├── CarRepos.xcodeproj
    ├── project.pbxproj
    ├── project.xcworkspace
    │   ├── contents.xcworkspacedata
    │   └── xcuserdata
    │   │   └── priyankapote.xcuserdatad
    │   │       └── UserInterfaceState.xcuserstate
    └── xcuserdata
    │   └── priyankapote.xcuserdatad
    │       └── xcschemes
    │           └── xcschememanagement.plist
├── CarRepos
    ├── AppDelegate.swift
    ├── Assets.xcassets
    │   └── AppIcon.appiconset
    │   │   └── Contents.json
    ├── Base.lproj
    │   ├── LaunchScreen.storyboard
    │   └── Main.storyboard
    ├── CarRepos.xcdatamodeld
    │   ├── .xccurrentversion
    │   └── CarRepos.xcdatamodel
    │   │   └── contents
    ├── CoreDataStack.swift
    ├── HomeViewController.swift
    ├── Images
    │   └── carImage.jpg
    ├── Info.plist
    ├── MyVehicleViewController.swift
    ├── Service
    │   └── CarService.swift
    └── cars.json
└── README.md


/CarRepos.xcodeproj/project.pbxproj:
--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
/CarRepos.xcodeproj/project.xcworkspace/contents.xcworkspacedata:
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1 | <?xml version="1.0" encoding="UTF-8"?>
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6 |    </FileRef>
7 | </Workspace>
8 | 


--------------------------------------------------------------------------------
/CarRepos.xcodeproj/project.xcworkspace/xcuserdata/priyankapote.xcuserdatad/UserInterfaceState.xcuserstate:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/VamshiIITBHU14/BackgroundCoreData/f8f0aa2158e9014877d921ada701c3e5bb501d24/CarRepos.xcodeproj/project.xcworkspace/xcuserdata/priyankapote.xcuserdatad/UserInterfaceState.xcuserstate


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/CarRepos.xcodeproj/xcuserdata/priyankapote.xcuserdatad/xcschemes/xcschememanagement.plist:
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 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>SchemeUserState</key>
 6 | 	<dict>
 7 | 		<key>CarRepos.xcscheme</key>
 8 | 		<dict>
 9 | 			<key>orderHint</key>
10 | 			<integer>0</integer>
11 | 		</dict>
12 | 	</dict>
13 | </dict>
14 | </plist>
15 | 


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/CarRepos/AppDelegate.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.swift
 3 | //  CarRepos
 4 | //
 5 | //  Created by Vamshi Krishna on 08/11/17.
 6 | //  Copyright © 2017 VamshiKrishna. All rights reserved.
 7 | //
 8 | 
 9 | import UIKit
10 | import CoreData
11 | 
12 | @UIApplicationMain
13 | class AppDelegate: UIResponder, UIApplicationDelegate {
14 | 
15 |     var window: UIWindow?
16 |     var coreData = CoreDataStack()
17 |     var managedObjectContext : NSManagedObjectContext!
18 | 
19 | 
20 |     func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
21 |         // Override point for customization after application launch.
22 |         managedObjectContext = coreData.persistentContainer.viewContext
23 |         let sourceController = self.window?.rootViewController as! HomeViewController
24 |         sourceController.managedObjectContext = managedObjectContext
25 |         
26 |         let carService = CarService(managedObjectContext: managedObjectContext)
27 |         carService.deleteVehicleData()
28 |         carService.loadVehicleData()
29 |         
30 |         return true
31 |     }
32 | 
33 |     func applicationWillResignActive(_ application: UIApplication) {
34 |         // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
35 |         // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
36 |     }
37 | 
38 |     func applicationDidEnterBackground(_ application: UIApplication) {
39 |         // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
40 |         // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
41 |     }
42 | 
43 |     func applicationWillEnterForeground(_ application: UIApplication) {
44 |         // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
45 |     }
46 | 
47 |     func applicationDidBecomeActive(_ application: UIApplication) {
48 |         // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
49 |     }
50 | 
51 |     func applicationWillTerminate(_ application: UIApplication) {
52 |         // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
53 |         // Saves changes in the application's managed object context before the application terminates.
54 |     }
55 |     
56 | 
57 | }
58 | 
59 | 


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/CarRepos/Assets.xcassets/AppIcon.appiconset/Contents.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "images" : [
 3 |     {
 4 |       "idiom" : "iphone",
 5 |       "size" : "20x20",
 6 |       "scale" : "2x"
 7 |     },
 8 |     {
 9 |       "idiom" : "iphone",
10 |       "size" : "20x20",
11 |       "scale" : "3x"
12 |     },
13 |     {
14 |       "idiom" : "iphone",
15 |       "size" : "29x29",
16 |       "scale" : "2x"
17 |     },
18 |     {
19 |       "idiom" : "iphone",
20 |       "size" : "29x29",
21 |       "scale" : "3x"
22 |     },
23 |     {
24 |       "idiom" : "iphone",
25 |       "size" : "40x40",
26 |       "scale" : "2x"
27 |     },
28 |     {
29 |       "idiom" : "iphone",
30 |       "size" : "40x40",
31 |       "scale" : "3x"
32 |     },
33 |     {
34 |       "idiom" : "iphone",
35 |       "size" : "60x60",
36 |       "scale" : "2x"
37 |     },
38 |     {
39 |       "idiom" : "iphone",
40 |       "size" : "60x60",
41 |       "scale" : "3x"
42 |     },
43 |     {
44 |       "idiom" : "ipad",
45 |       "size" : "20x20",
46 |       "scale" : "1x"
47 |     },
48 |     {
49 |       "idiom" : "ipad",
50 |       "size" : "20x20",
51 |       "scale" : "2x"
52 |     },
53 |     {
54 |       "idiom" : "ipad",
55 |       "size" : "29x29",
56 |       "scale" : "1x"
57 |     },
58 |     {
59 |       "idiom" : "ipad",
60 |       "size" : "29x29",
61 |       "scale" : "2x"
62 |     },
63 |     {
64 |       "idiom" : "ipad",
65 |       "size" : "40x40",
66 |       "scale" : "1x"
67 |     },
68 |     {
69 |       "idiom" : "ipad",
70 |       "size" : "40x40",
71 |       "scale" : "2x"
72 |     },
73 |     {
74 |       "idiom" : "ipad",
75 |       "size" : "76x76",
76 |       "scale" : "1x"
77 |     },
78 |     {
79 |       "idiom" : "ipad",
80 |       "size" : "76x76",
81 |       "scale" : "2x"
82 |     },
83 |     {
84 |       "idiom" : "ipad",
85 |       "size" : "83.5x83.5",
86 |       "scale" : "2x"
87 |     }
88 |   ],
89 |   "info" : {
90 |     "version" : 1,
91 |     "author" : "xcode"
92 |   }
93 | }


--------------------------------------------------------------------------------
/CarRepos/Base.lproj/LaunchScreen.storyboard:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" systemVersion="17A277" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
 3 |     <dependencies>
 4 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
 5 |         <capability name="Safe area layout guides" minToolsVersion="9.0"/>
 6 |         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
 7 |     </dependencies>
 8 |     <scenes>
 9 |         <!--View Controller-->
10 |         <scene sceneID="EHf-IW-A2E">
11 |             <objects>
12 |                 <viewController id="01J-lp-oVM" sceneMemberID="viewController">
13 |                     <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
14 |                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
15 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
16 |                         <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
17 |                         <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
18 |                     </view>
19 |                 </viewController>
20 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
21 |             </objects>
22 |             <point key="canvasLocation" x="53" y="375"/>
23 |         </scene>
24 |     </scenes>
25 | </document>
26 | 


--------------------------------------------------------------------------------
/CarRepos/Base.lproj/Main.storyboard:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13529" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="NzX-6p-0pu">
 3 |     <device id="retina4_7" orientation="portrait">
 4 |         <adaptation id="fullscreen"/>
 5 |     </device>
 6 |     <dependencies>
 7 |         <deployment identifier="iOS"/>
 8 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13527"/>
 9 |         <capability name="Aspect ratio constraints" minToolsVersion="5.1"/>
10 |         <capability name="Constraints with non-1.0 multipliers" minToolsVersion="5.1"/>
11 |         <capability name="Safe area layout guides" minToolsVersion="9.0"/>
12 |         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
13 |     </dependencies>
14 |     <scenes>
15 |         <!--Home View Controller-->
16 |         <scene sceneID="QVL-UQ-X0R">
17 |             <objects>
18 |                 <viewController id="NzX-6p-0pu" customClass="HomeViewController" customModule="CarRepos" customModuleProvider="target" sceneMemberID="viewController">
19 |                     <view key="view" contentMode="scaleToFill" id="b4H-cg-ca5">
20 |                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
21 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
22 |                         <subviews>
23 |                             <imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="carImage.jpg" translatesAutoresizingMaskIntoConstraints="NO" id="IB2-B3-e5v">
24 |                                 <rect key="frame" x="0.0" y="0.0" width="375" height="333.5"/>
25 |                             </imageView>
26 |                             <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="Ifh-36-lSh">
27 |                                 <rect key="frame" x="0.0" y="340" width="375" height="51.5"/>
28 |                                 <constraints>
29 |                                     <constraint firstAttribute="width" secondItem="Ifh-36-lSh" secondAttribute="height" multiplier="29:4" id="unc-cE-iqt"/>
30 |                                 </constraints>
31 |                                 <fontDescription key="fontDescription" type="system" pointSize="18"/>
32 |                                 <state key="normal" title="Fetch Cars"/>
33 |                                 <connections>
34 |                                     <action selector="fetchCarsClicked:" destination="NzX-6p-0pu" eventType="touchUpInside" id="cRe-YA-MRM"/>
35 |                                     <segue destination="mqy-Vy-gNb" kind="show" identifier="segueMyVehicles" id="0I5-bs-orf"/>
36 |                                 </connections>
37 |                             </button>
38 |                         </subviews>
39 |                         <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
40 |                         <constraints>
41 |                             <constraint firstItem="Ifh-36-lSh" firstAttribute="leading" secondItem="IB2-B3-e5v" secondAttribute="leading" id="4Ly-oc-PpI"/>
42 |                             <constraint firstItem="IB2-B3-e5v" firstAttribute="top" secondItem="b4H-cg-ca5" secondAttribute="top" id="C7y-n0-3Bl"/>
43 |                             <constraint firstItem="Ifh-36-lSh" firstAttribute="trailing" secondItem="IB2-B3-e5v" secondAttribute="trailing" id="FDz-tJ-vtT"/>
44 |                             <constraint firstItem="IB2-B3-e5v" firstAttribute="leading" secondItem="jUD-yX-ew6" secondAttribute="leading" id="VEL-wm-7QH"/>
45 |                             <constraint firstItem="IB2-B3-e5v" firstAttribute="height" secondItem="b4H-cg-ca5" secondAttribute="height" multiplier="0.5" id="Ylx-L1-zq6"/>
46 |                             <constraint firstItem="IB2-B3-e5v" firstAttribute="trailing" secondItem="jUD-yX-ew6" secondAttribute="trailing" id="cgd-Rp-xvo"/>
47 |                             <constraint firstItem="Ifh-36-lSh" firstAttribute="top" secondItem="IB2-B3-e5v" secondAttribute="bottom" multiplier="1.02" id="lAH-My-u7L"/>
48 |                         </constraints>
49 |                         <viewLayoutGuide key="safeArea" id="jUD-yX-ew6"/>
50 |                     </view>
51 |                 </viewController>
52 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="k2H-Hg-SAe" userLabel="First Responder" sceneMemberID="firstResponder"/>
53 |             </objects>
54 |             <point key="canvasLocation" x="140" y="119.1904047976012"/>
55 |         </scene>
56 |         <!--My Vehicle View Controller-->
57 |         <scene sceneID="00x-Ye-tv1">
58 |             <objects>
59 |                 <viewController id="mqy-Vy-gNb" customClass="MyVehicleViewController" customModule="CarRepos" customModuleProvider="target" sceneMemberID="viewController">
60 |                     <view key="view" contentMode="scaleToFill" id="yEW-th-HbJ">
61 |                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
62 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
63 |                         <subviews>
64 |                             <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="dVl-U1-j78">
65 |                                 <rect key="frame" x="167" y="318.5" width="41" height="30"/>
66 |                                 <state key="normal" title="Home"/>
67 |                                 <connections>
68 |                                     <action selector="backToHome:" destination="mqy-Vy-gNb" eventType="touchUpInside" id="jQA-xA-u80"/>
69 |                                 </connections>
70 |                             </button>
71 |                         </subviews>
72 |                         <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
73 |                         <constraints>
74 |                             <constraint firstItem="dVl-U1-j78" firstAttribute="centerY" secondItem="yEW-th-HbJ" secondAttribute="centerY" id="CF4-8Q-Kh5"/>
75 |                             <constraint firstItem="dVl-U1-j78" firstAttribute="centerX" secondItem="yEW-th-HbJ" secondAttribute="centerX" id="ePa-Ov-hbN"/>
76 |                         </constraints>
77 |                         <viewLayoutGuide key="safeArea" id="tnV-WW-L9E"/>
78 |                     </view>
79 |                 </viewController>
80 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="tcZ-G8-tQK" userLabel="First Responder" sceneMemberID="firstResponder"/>
81 |             </objects>
82 |             <point key="canvasLocation" x="806" y="119"/>
83 |         </scene>
84 |     </scenes>
85 |     <resources>
86 |         <image name="carImage.jpg" width="590" height="350"/>
87 |     </resources>
88 | </document>
89 | 


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/CarRepos/CarRepos.xcdatamodeld/.xccurrentversion:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
3 | <plist version="1.0">
4 | <dict>
5 | 	<key>_XCCurrentVersionName</key>
6 | 	<string>CarRepos.xcdatamodel</string>
7 | </dict>
8 | </plist>
9 | 


--------------------------------------------------------------------------------
/CarRepos/CarRepos.xcdatamodeld/CarRepos.xcdatamodel/contents:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 2 | <model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="13533" systemVersion="16G29" minimumToolsVersion="Automatic" sourceLanguage="Swift" userDefinedModelVersionIdentifier="">
 3 |     <entity name="AutoMaker" representedClassName="AutoMaker" syncable="YES" codeGenerationType="class">
 4 |         <attribute name="make" optional="YES" attributeType="String" syncable="YES"/>
 5 |         <relationship name="autoModel" optional="YES" toMany="YES" deletionRule="Nullify" destinationEntity="AutoModel" inverseName="autoMaker" inverseEntity="AutoModel" syncable="YES"/>
 6 |     </entity>
 7 |     <entity name="AutoModel" representedClassName="AutoModel" syncable="YES" codeGenerationType="class">
 8 |         <attribute name="model" optional="YES" attributeType="String" syncable="YES"/>
 9 |         <relationship name="autoMaker" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="AutoMaker" inverseName="autoModel" inverseEntity="AutoMaker" syncable="YES"/>
10 |         <relationship name="autoYear" optional="YES" toMany="YES" deletionRule="Nullify" destinationEntity="AutoYear" inverseName="autoModel" inverseEntity="AutoYear" syncable="YES"/>
11 |     </entity>
12 |     <entity name="AutoYear" representedClassName="AutoYear" syncable="YES" codeGenerationType="class">
13 |         <attribute name="year" optional="YES" attributeType="Integer 16" defaultValueString="0" usesScalarValueType="YES" syncable="YES"/>
14 |         <relationship name="autoModel" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="AutoModel" inverseName="autoYear" inverseEntity="AutoModel" syncable="YES"/>
15 |     </entity>
16 |     <entity name="Car" representedClassName="Car" syncable="YES" codeGenerationType="class">
17 |         <attribute name="image" optional="YES" attributeType="Binary" syncable="YES"/>
18 |         <attribute name="make" optional="YES" attributeType="String" syncable="YES"/>
19 |         <attribute name="model" optional="YES" attributeType="String" syncable="YES"/>
20 |         <attribute name="name" optional="YES" attributeType="String" syncable="YES"/>
21 |         <attribute name="year" optional="YES" attributeType="Integer 16" defaultValueString="0" usesScalarValueType="YES" syncable="YES"/>
22 |     </entity>
23 |     <elements>
24 |         <element name="AutoMaker" positionX="-342" positionY="-207" width="128" height="73"/>
25 |         <element name="AutoModel" positionX="-180" positionY="-34" width="128" height="88"/>
26 |         <element name="AutoYear" positionX="-128" positionY="-252" width="128" height="73"/>
27 |         <element name="Car" positionX="-18" positionY="27" width="128" height="120"/>
28 |     </elements>
29 | </model>


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/CarRepos/CoreDataStack.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  CoreDataStack.swift
 3 | //  CarRepos
 4 | //
 5 | //  Created by Vamshi Krishna on 08/11/17.
 6 | //  Copyright © 2017 VamshiKrishna. All rights reserved.
 7 | //
 8 | 
 9 | import Foundation
10 | import CoreData
11 | 
12 | class CoreDataStack {
13 |     lazy var persistentContainer: NSPersistentContainer = {
14 |         /*
15 |          The persistent container for the application. This implementation
16 |          creates and returns a container, having loaded the store for the
17 |          application to it. This property is optional since there are legitimate
18 |          error conditions that could cause the creation of the store to fail.
19 |          */
20 |         let container = NSPersistentContainer(name: "CarRepos")
21 |         container.loadPersistentStores(completionHandler: { (storeDescription, error) in
22 |             if let error = error as NSError? {
23 |                 // Replace this implementation with code to handle the error appropriately.
24 |                 // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
25 |                 
26 |                 /*
27 |                  Typical reasons for an error here include:
28 |                  * The parent directory does not exist, cannot be created, or disallows writing.
29 |                  * The persistent store is not accessible, due to permissions or data protection when the device is locked.
30 |                  * The device is out of space.
31 |                  * The store could not be migrated to the current model version.
32 |                  Check the error message to determine what the actual problem was.
33 |                  */
34 |                 fatalError("Unresolved error \(error), \(error.userInfo)")
35 |             }
36 |         })
37 |         return container
38 |     }()
39 |     
40 |     // MARK: - Core Data Saving support
41 |     
42 |     func saveContext () {
43 |         let context = persistentContainer.viewContext
44 |         if context.hasChanges {
45 |             do {
46 |                 try context.save()
47 |             } catch {
48 |                 // Replace this implementation with code to handle the error appropriately.
49 |                 // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
50 |                 let nserror = error as NSError
51 |                 fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
52 |             }
53 |         }
54 |     }
55 | }
56 | 


--------------------------------------------------------------------------------
/CarRepos/HomeViewController.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  HomeViewController.swift
 3 | //  CarRepos
 4 | //
 5 | //  Created by Vamshi Krishna on 08/11/17.
 6 | //  Copyright © 2017 VamshiKrishna. All rights reserved.
 7 | //
 8 | 
 9 | import UIKit
10 | import CoreData
11 | 
12 | class HomeViewController: UIViewController {
13 |     
14 |     var managedObjectContext:NSManagedObjectContext!
15 | 
16 |     override func viewDidLoad() {
17 |         super.viewDidLoad()
18 |     }
19 | 
20 |     @IBAction func fetchCarsClicked(_ sender: Any) {
21 |         
22 |     }
23 |     
24 |     override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
25 |         if (segue.identifier == "segueMyVehicles"){
26 |             let controller = segue.destination as! MyVehicleViewController
27 |             controller.managedObjectContext = managedObjectContext
28 |         }
29 |     }
30 | }
31 | 
32 | 


--------------------------------------------------------------------------------
/CarRepos/Images/carImage.jpg:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/VamshiIITBHU14/BackgroundCoreData/f8f0aa2158e9014877d921ada701c3e5bb501d24/CarRepos/Images/carImage.jpg


--------------------------------------------------------------------------------
/CarRepos/Info.plist:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>CFBundleDevelopmentRegion</key>
 6 | 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 7 | 	<key>CFBundleExecutable</key>
 8 | 	<string>$(EXECUTABLE_NAME)</string>
 9 | 	<key>CFBundleIdentifier</key>
10 | 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
11 | 	<key>CFBundleInfoDictionaryVersion</key>
12 | 	<string>6.0</string>
13 | 	<key>CFBundleName</key>
14 | 	<string>$(PRODUCT_NAME)</string>
15 | 	<key>CFBundlePackageType</key>
16 | 	<string>APPL</string>
17 | 	<key>CFBundleShortVersionString</key>
18 | 	<string>1.0</string>
19 | 	<key>CFBundleVersion</key>
20 | 	<string>1</string>
21 | 	<key>LSRequiresIPhoneOS</key>
22 | 	<true/>
23 | 	<key>UILaunchStoryboardName</key>
24 | 	<string>LaunchScreen</string>
25 | 	<key>UIMainStoryboardFile</key>
26 | 	<string>Main</string>
27 | 	<key>UIRequiredDeviceCapabilities</key>
28 | 	<array>
29 | 		<string>armv7</string>
30 | 	</array>
31 | 	<key>UISupportedInterfaceOrientations</key>
32 | 	<array>
33 | 		<string>UIInterfaceOrientationPortrait</string>
34 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
35 | 		<string>UIInterfaceOrientationLandscapeRight</string>
36 | 	</array>
37 | 	<key>UISupportedInterfaceOrientations~ipad</key>
38 | 	<array>
39 | 		<string>UIInterfaceOrientationPortrait</string>
40 | 		<string>UIInterfaceOrientationPortraitUpsideDown</string>
41 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
42 | 		<string>UIInterfaceOrientationLandscapeRight</string>
43 | 	</array>
44 | </dict>
45 | </plist>
46 | 


--------------------------------------------------------------------------------
/CarRepos/MyVehicleViewController.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  MyVehicleViewController.swift
 3 | //  CarRepos
 4 | //
 5 | //  Created by Vamshi Krishna on 08/11/17.
 6 | //  Copyright © 2017 VamshiKrishna. All rights reserved.
 7 | //
 8 | 
 9 | import UIKit
10 | import CoreData
11 | 
12 | class MyVehicleViewController: UIViewController {
13 | 
14 |     var managedObjectContext:NSManagedObjectContext!
15 |     
16 |     override func viewDidLoad() {
17 |         super.viewDidLoad()
18 |         let carService = CarService(managedObjectContext: managedObjectContext)
19 |         carService.showVehicle()
20 |     }
21 | 
22 |     @IBAction func backToHome(_ sender:AnyObject){
23 |         dismiss(animated: true, completion: nil)
24 |     }
25 |    
26 | 
27 | }
28 | 


--------------------------------------------------------------------------------
/CarRepos/Service/CarService.swift:
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  1 | //
  2 | //  CarService.swift
  3 | //  CarRepos
  4 | //
  5 | //  Created by Vamshi Krishna on 08/11/17.
  6 | //  Copyright © 2017 VamshiKrishna. All rights reserved.
  7 | //
  8 | 
  9 | import Foundation
 10 | import CoreData
 11 | 
 12 | class CarService{
 13 |     
 14 |     internal var managedObjectContext: NSManagedObjectContext!
 15 |     
 16 |     internal init(managedObjectContext: NSManagedObjectContext) {
 17 |         self.managedObjectContext = managedObjectContext
 18 |     }
 19 |     
 20 |     deinit {
 21 |         self.managedObjectContext = nil
 22 |     }
 23 |     
 24 |     internal func getMyVehicles() -> [Car] {
 25 |         var cars = [Car]()
 26 |         
 27 |         let request: NSFetchRequest<Car> = Car.fetchRequest()
 28 |         
 29 |         do {
 30 |             cars = try managedObjectContext.fetch(request)
 31 |         }
 32 |         catch {
 33 |             fatalError("Error loading cars")
 34 |         }
 35 |         
 36 |         return cars
 37 |     }
 38 |     
 39 |     internal func deleteVehicle(_ car: Car) {
 40 |         managedObjectContext.delete(car)
 41 |         saveState()
 42 |     }
 43 |     
 44 |     fileprivate func saveState() {
 45 |         do {
 46 |             try self.managedObjectContext.save()
 47 |         }
 48 |         catch {
 49 |             fatalError("Error inserting service record")
 50 |         }
 51 |     }
 52 |     
 53 |     func loadVehicleData() {
 54 |         
 55 |         let url = Bundle.main.url(forResource: "cars", withExtension: "json")
 56 |         let data = NSData(contentsOf: url!)
 57 |         
 58 |                 self.managedObjectContext.perform({
 59 |                     do {
 60 |                         
 61 |                         let jsonResult =  try JSONSerialization.jsonObject(with: data! as Data, options: JSONSerialization.ReadingOptions.mutableContainers) as! NSDictionary
 62 |                         let jsonArray = jsonResult.value(forKey: "makes") as! NSArray
 63 |                         
 64 |                         for json in jsonArray {
 65 |                             let carData = json as! [String: AnyObject]
 66 |                             
 67 |                             guard let makeName = carData["name"] else { return }
 68 |                             let autoMaker = AutoMaker(context: self.managedObjectContext)
 69 |                             autoMaker.make = makeName as? String
 70 |                             
 71 |                             // Get the current AutoModels under the current AutoMaker
 72 |                             let autoModels = autoMaker.autoModel!.mutableCopy() as! NSMutableSet
 73 |                             
 74 |                             // Get the available AutoModel in JSON object for the current AutoMaker
 75 |                             guard let arrModelNames = carData["models"] as? NSArray else { return }
 76 |                             for modelName in arrModelNames {
 77 |                                 let jsonModel = modelName as! [String: AnyObject]
 78 |                                 let modelName = jsonModel["name"] as? String
 79 |                                 
 80 |                                 let autoModel = AutoModel(context: self.managedObjectContext)
 81 |                                 autoModel.model = modelName
 82 |                                 
 83 |                                 let autoYears = autoModel.autoYear!.mutableCopy() as! NSMutableSet
 84 |                                 
 85 |                                 guard let arrModelYears = jsonModel["years"] as? NSArray else { return }
 86 |                                 for modelYear in arrModelYears {
 87 |                                     let jsonYear = modelYear as! [String: AnyObject]
 88 |                                     let year = jsonYear["year"] as? NSNumber
 89 |                                     
 90 |                                     let autoYear = AutoYear(context: self.managedObjectContext)
 91 |                                     autoYear.year = (year?.int16Value)!
 92 |                                     autoYears.add(autoYear)
 93 |                                 }
 94 |                                 
 95 |                                 // Set AutoYear into AutoModel for CoreData
 96 |                                 autoModel.autoYear = autoYears.copy() as? NSSet
 97 |                                 
 98 |                                 autoModels.add(autoModel)
 99 |                             }
100 |                             
101 |                             // Set the AutoModel into AutoMaker for CoreData
102 |                             autoMaker.autoModel = autoModels.copy() as? NSSet
103 |                         }
104 |                         
105 |                         try self.managedObjectContext.save()
106 |                     }
107 |                     catch let error as NSError {
108 |                         print("Error in parsing JSON data: \(error.localizedDescription)")
109 |                     }
110 |                 })
111 |                 self.showVehicle()
112 |     }
113 |     
114 |     
115 |     func deleteVehicleData() {
116 |         let makerRequest: NSFetchRequest<AutoMaker> = AutoMaker.fetchRequest()
117 |         let modelRequest: NSFetchRequest<AutoModel> = AutoModel.fetchRequest()
118 |         let yearRequest: NSFetchRequest<AutoYear> = AutoYear.fetchRequest()
119 |         
120 |         do {
121 |             let makerResult = try self.managedObjectContext.fetch(makerRequest)
122 |             
123 |             for maker in makerResult {
124 |                 self.managedObjectContext.delete(maker)
125 |             }
126 |             
127 |             let modelResult = try self.managedObjectContext.fetch(modelRequest)
128 |             for model in modelResult {
129 |                 self.managedObjectContext.delete(model)
130 |             }
131 |             
132 |             let yearResult = try self.managedObjectContext.fetch(yearRequest)
133 |             for year in yearResult {
134 |                 self.managedObjectContext.delete(year)
135 |             }
136 |             
137 |             try self.managedObjectContext.save()
138 |         }
139 |         catch {
140 |             fatalError("Error deleting objects")
141 |         }
142 |     }
143 |     
144 |     func showVehicle() {
145 |         let request: NSFetchRequest<AutoMaker> = AutoMaker.fetchRequest()
146 |         request.predicate = NSPredicate(format: "make = 'Acura'")
147 |         
148 |         do {
149 |             let results = try managedObjectContext.fetch(request)
150 |             let autoMaker = results.first
151 |             print("Automaker: \(String(describing: autoMaker?.make))")
152 |         }
153 |         catch {
154 |             fatalError()
155 |         }
156 |     }
157 | }
158 | 


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/CarRepos/cars.json:
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1 | {"makes":[{"id":200347864,"name":"AM General","niceName":"am-general","models":[{"id":"AM_General_Hummer","name":"Hummer","niceName":"hummer","years":[{"id":3407,"year":1998},{"id":1140,"year":1999},{"id":305,"year":2000}]}]},{"id":200002038,"name":"Acura","niceName":"acura","models":[{"id":"Acura_CL","name":"CL","niceName":"cl","years":[{"id":3265,"year":1997},{"id":3266,"year":1998},{"id":960,"year":1999},{"id":100000010,"year":2001},{"id":100000456,"year":2002},{"id":100502607,"year":2003}]},{"id":"Acura_ILX","name":"ILX","niceName":"ilx","years":[{"id":100538929,"year":2013},{"id":200471908,"year":2014},{"id":200701415,"year":2015},{"id":200713715,"year":2016},{"id":401640361,"year":2017},{"id":401738519,"year":2018}]},{"id":"Acura_ILX_Hybrid","name":"ILX Hybrid","niceName":"ilx-hybrid","years":[{"id":200493809,"year":2014}]},{"id":"Acura_Integra","name":"Integra","niceName":"integra","years":[{"id":3268,"year":1990},{"id":890,"year":1991},{"id":3269,"year":1992},{"id":3270,"year":1993},{"id":891,"year":1994},{"id":3271,"year":1995},{"id":3272,"year":1996},{"id":892,"year":1997},{"id":3273,"year":1998},{"id":3411,"year":1999},{"id":1080,"year":2000},{"id":100000008,"year":2001}]},{"id":"Acura_Legend","name":"Legend","niceName":"legend","years":[{"id":3275,"year":1990},{"id":893,"year":1991},{"id":3276,"year":1992},{"id":3277,"year":1993},{"id":894,"year":1994},{"id":3278,"year":1995}]},{"id":"Acura_MDX","name":"MDX","niceName":"mdx","years":[{"id":100000009,"year":2001},{"id":100000530,"year":2002},{"id":100502711,"year":2003},{"id":100503653,"year":2004},{"id":100504946,"year":2005},{"id":100506940,"year":2006},{"id":100507584,"year":2007},{"id":100524172,"year":2008},{"id":100525749,"year":2009},{"id":100530869,"year":2010},{"id":100533210,"year":2011},{"id":100538329,"year":2012},{"id":200434553,"year":2013},{"id":200465929,"year":2014},{"id":200698434,"year":2015},{"id":200726800,"year":2016},{"id":200781960,"year":2017},{"id":401734378,"year":2018}]},{"id":"Acura_NSX","name":"NSX","niceName":"nsx","years":[{"id":100000366,"year":1991},{"id":3279,"year":1992},{"id":3280,"year":1993},{"id":3281,"year":1994},{"id":3282,"year":1995},{"id":3283,"year":1996},{"id":3284,"year":1997},{"id":3285,"year":1998},{"id":3412,"year":1999},{"id":953,"year":2000},{"id":100000011,"year":2001},{"id":100000573,"year":2002},{"id":100502712,"year":2003},{"id":100503652,"year":2004},{"id":100504947,"year":2005},{"id":200779937,"year":2017}]},{"id":"Acura_RDX","name":"RDX","niceName":"rdx","years":[{"id":100505131,"year":2007},{"id":100523811,"year":2008},{"id":100525429,"year":2009},{"id":100528669,"year":2010},{"id":100533372,"year":2011},{"id":100537229,"year":2012},{"id":100538949,"year":2013},{"id":200467168,"year":2014},{"id":200693511,"year":2015},{"id":200727186,"year":2016},{"id":401640362,"year":2017},{"id":401720010,"year":2018}]},{"id":"Acura_RL","name":"RL","niceName":"rl","years":[{"id":3286,"year":1996},{"id":3410,"year":1997},{"id":3287,"year":1998},{"id":3413,"year":1999},{"id":397,"year":2000},{"id":100000012,"year":2001},{"id":100000322,"year":2002},{"id":100502713,"year":2003},{"id":100502994,"year":2004},{"id":100503143,"year":2005},{"id":100506663,"year":2006},{"id":100519602,"year":2007},{"id":100523569,"year":2008},{"id":100525535,"year":2009},{"id":100528489,"year":2010},{"id":100534129,"year":2011},{"id":100524991,"year":2012}]},{"id":"Acura_RLX","name":"RLX","niceName":"rlx","years":[{"id":100539511,"year":2014},{"id":200706522,"year":2015},{"id":200729233,"year":2016},{"id":401676770,"year":2017}]},{"id":"Acura_RSX","name":"RSX","niceName":"rsx","years":[{"id":100000367,"year":2002},{"id":100502714,"year":2003},{"id":100503651,"year":2004},{"id":100504943,"year":2005},{"id":100506564,"year":2006}]},{"id":"Acura_SLX","name":"SLX","niceName":"slx","years":[{"id":3288,"year":1996},{"id":3289,"year":1997},{"id":3290,"year":1998},{"id":961,"year":1999}]},{"id":"Acura_TL","name":"TL","niceName":"tl","years":[{"id":100000368,"year":1995},{"id":3291,"year":1996},{"id":3408,"year":1997},{"id":895,"year":1998},{"id":3414,"year":1999},{"id":1067,"year":2000},{"id":100000013,"year":2001},{"id":100000321,"year":2002},{"id":100502606,"year":2003},{"id":100502993,"year":2004},{"id":100504945,"year":2005},{"id":100506840,"year":2006},{"id":100519601,"year":2007},{"id":100523753,"year":2008},{"id":100524030,"year":2009},{"id":100529409,"year":2010},{"id":100532894,"year":2011},{"id":100533455,"year":2012},{"id":200433190,"year":2013},{"id":200488448,"year":2014}]},{"id":"Acura_TLX","name":"TLX","niceName":"tlx","years":[{"id":200673634,"year":2015},{"id":401583109,"year":2016},{"id":401658802,"year":2017},{"id":401715719,"year":2018}]},{"id":"Acura_TSX","name":"TSX","niceName":"tsx","years":[{"id":100503100,"year":2004},{"id":100504944,"year":2005},{"id":100507159,"year":2006},{"id":100520228,"year":2007},{"id":100523478,"year":2008},{"id":100507581,"year":2009},{"id":100527369,"year":2010},{"id":100530509,"year":2011},{"id":100537769,"year":2012},{"id":200437325,"year":2013},{"id":200490517,"year":2014}]},{"id":"Acura_TSX_Sport_Wagon","name":"TSX Sport Wagon","niceName":"tsx-sport-wagon","years":[{"id":100533969,"year":2011},{"id":100537789,"year":2012},{"id":200440520,"year":2013},{"id":200673755,"year":2014}]},{"id":"Acura_Vigor","name":"Vigor","niceName":"vigor","years":[{"id":3292,"year":1992},{"id":3293,"year":1993},{"id":896,"year":1994}]},{"id":"Acura_ZDX","name":"ZDX","niceName":"zdx","years":[{"id":100527650,"year":2010},{"id":100534109,"year":2011},{"id":100537249,"year":2012},{"id":200441835,"year":2013}]}]},{"id":200464140,"name":"Alfa Romeo","niceName":"alfa-romeo","models":[{"id":"Alfa_Romeo_4C","name":"4C","niceName":"4c","years":[{"id":200700684,"year":2015},{"id":401630278,"year":2016},{"id":401665445,"year":2017},{"id":401733574,"year":2018}]},{"id":"Alfa_Romeo_Giulia","name":"Giulia","niceName":"giulia","years":[{"id":200741082,"year":2017},{"id":401724804,"year":2018}]},{"id":"Alfa_Romeo_Stelvio","name":"Stelvio","niceName":"stelvio","years":[{"id":401717892,"year":2018}]}]},{"id":200001769,"name":"Aston Martin","niceName":"aston-martin","models":[{"id":"Aston_Martin_DB11","name":"DB11","niceName":"db11","years":[{"id":401696107,"year":2017}]},{"id":"Aston_Martin_DB7","name":"DB7","niceName":"db7","years":[{"id":100000269,"year":2001},{"id":100000548,"year":2002},{"id":100503076,"year":2003}]},{"id":"Aston_Martin_DB9","name":"DB9","niceName":"db9","years":[{"id":100503551,"year":2005},{"id":100516903,"year":2006},{"id":100516886,"year":2007},{"id":100524869,"year":2008},{"id":100526129,"year":2009},{"id":100531569,"year":2010},{"id":100532429,"year":2011},{"id":100537350,"year":2012},{"id":200473435,"year":2013},{"id":200473436,"year":2014},{"id":401632427,"year":2015}]},{"id":"Aston_Martin_DB9_GT","name":"DB9 GT","niceName":"db9-gt","years":[{"id":401630246,"year":2016}]},{"id":"Aston_Martin_DBS","name":"DBS","niceName":"dbs","years":[{"id":100519044,"year":2008},{"id":100527534,"year":2009},{"id":100524969,"year":2010},{"id":100531250,"year":2011},{"id":100532430,"year":2012}]},{"id":"Aston_Martin_Rapide","name":"Rapide","niceName":"rapide","years":[{"id":100507321,"year":2010},{"id":100533509,"year":2011},{"id":100537349,"year":2012}]},{"id":"Aston_Martin_Rapide_S","name":"Rapide S","niceName":"rapide-s","years":[{"id":200460643,"year":2014},{"id":401632296,"year":2015},{"id":401632439,"year":2016},{"id":401698011,"year":2017}]},{"id":"Aston_Martin_V12_Vanquish","name":"V12 Vanquish","niceName":"v12-vanquish","years":[{"id":100502589,"year":2002},{"id":100503077,"year":2003},{"id":100504522,"year":2004},{"id":100504682,"year":2005},{"id":100516904,"year":2006}]},{"id":"Aston_Martin_V12_Vantage","name":"V12 Vantage","niceName":"v12-vantage","years":[{"id":100531969,"year":2011},{"id":100537351,"year":2012}]},{"id":"Aston_Martin_V12_Vantage_S","name":"V12 Vantage S","niceName":"v12-vantage-s","years":[{"id":200693539,"year":2015},{"id":401633296,"year":2016},{"id":401699716,"year":2017}]},{"id":"Aston_Martin_V8_Vantage","name":"V8 Vantage","niceName":"v8-vantage","years":[{"id":100503104,"year":2006},{"id":100524569,"year":2007},{"id":100512807,"year":2008},{"id":100527609,"year":2009},{"id":100531550,"year":2010},{"id":100533549,"year":2011},{"id":100537352,"year":2012},{"id":200472001,"year":2013},{"id":200472947,"year":2014},{"id":401627346,"year":2015},{"id":401627333,"year":2016}]},{"id":"Aston_Martin_Vanquish","name":"Vanquish","niceName":"vanquish","years":[{"id":200431313,"year":2014},{"id":401631543,"year":2015},{"id":401631544,"year":2016},{"id":401696095,"year":2017}]},{"id":"Aston_Martin_Vanquish_S","name":"Vanquish S","niceName":"vanquish-s","years":[{"id":401710084,"year":2018}]},{"id":"Aston_Martin_Virage","name":"Virage","niceName":"virage","years":[{"id":100535109,"year":2011},{"id":100534789,"year":2012}]}]},{"id":200000001,"name":"Audi","niceName":"audi","models":[{"id":"Audi_100","name":"100","niceName":"100","years":[{"id":3295,"year":1990},{"id":897,"year":1991},{"id":3296,"year":1992},{"id":3297,"year":1993},{"id":3298,"year":1994}]},{"id":"Audi_200","name":"200","niceName":"200","years":[{"id":3300,"year":1990},{"id":3301,"year":1991}]},{"id":"Audi_80","name":"80","niceName":"80","years":[{"id":3303,"year":1990},{"id":3304,"year":1991},{"id":898,"year":1992}]},{"id":"Audi_90","name":"90","niceName":"90","years":[{"id":3306,"year":1990},{"id":899,"year":1991},{"id":3307,"year":1993},{"id":3308,"year":1994},{"id":900,"year":1995}]}]}],"makesCount":5}
2 | 


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/README.md:
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1 | # CoreDataBGThread
2 | This Project looks like nothing in the UI but it covers an important and complex topic in CoreData , i.e, writing data to Database in background thread so that UI does not get blocked. It uses Swift4 with a lot of reduction in boilerplate code. It also implements using a single managedobjectcontext. 
3 | Also implements:
4 | 1) Writing complext JSON to CoreData
5 | 2) Using OneToOne and OneToMany relationships among entities
6 | 


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