├── README.md
├── RJDownloaderDemo.xcodeproj
    ├── project.pbxproj
    ├── project.xcworkspace
    │   ├── contents.xcworkspacedata
    │   └── xcuserdata
    │   │   ├── Ryan.xcuserdatad
    │   │       └── UserInterfaceState.xcuserstate
    │   │   └── Rylan.xcuserdatad
    │   │       └── UserInterfaceState.xcuserstate
    └── xcuserdata
    │   ├── Ryan.xcuserdatad
    │       └── xcschemes
    │       │   ├── RJDownloaderDemo.xcscheme
    │       │   └── xcschememanagement.plist
    │   └── Rylan.xcuserdatad
    │       ├── xcdebugger
    │           └── Breakpoints_v2.xcbkptlist
    │       └── xcschemes
    │           ├── RJDownloaderDemo.xcscheme
    │           └── xcschememanagement.plist
└── RJDownloaderDemo
    ├── AppDelegate.h
    ├── AppDelegate.m
    ├── Assets.xcassets
        └── AppIcon.appiconset
        │   └── Contents.json
    ├── Base.lproj
        ├── LaunchScreen.storyboard
        └── Main.storyboard
    ├── Info.plist
    ├── RJHTTPDownloader
        ├── RJHTTPDownloader.h
        └── RJHTTPDownloader.m
    ├── ViewController.h
    ├── ViewController.m
    └── main.m


/README.md:
--------------------------------------------------------------------------------
1 | # RJHTTPDownloader
2 | Sample project for blog post.
3 | 
4 | Demonstrated and illustrated the implementation of NSOperation with Concurrency Programming.
5 | 
6 | This is the code repository associated with blog post, please check out http://www.jianshu.com/p/ebb3e42049fd to view this article.
7 | 


--------------------------------------------------------------------------------
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56 |          <BuildableReference
57 |             BuildableIdentifier = "primary"
58 |             BlueprintIdentifier = "EE12923E1BFA0A91001C5E4B"
59 |             BuildableName = "RJDownloaderDemo.app"
60 |             BlueprintName = "RJDownloaderDemo"
61 |             ReferencedContainer = "container:RJDownloaderDemo.xcodeproj">
62 |          </BuildableReference>
63 |       </BuildableProductRunnable>
64 |       <AdditionalOptions>
65 |       </AdditionalOptions>
66 |    </LaunchAction>
67 |    <ProfileAction
68 |       buildConfiguration = "Release"
69 |       shouldUseLaunchSchemeArgsEnv = "YES"
70 |       savedToolIdentifier = ""
71 |       useCustomWorkingDirectory = "NO"
72 |       debugDocumentVersioning = "YES">
73 |       <BuildableProductRunnable
74 |          runnableDebuggingMode = "0">
75 |          <BuildableReference
76 |             BuildableIdentifier = "primary"
77 |             BlueprintIdentifier = "EE12923E1BFA0A91001C5E4B"
78 |             BuildableName = "RJDownloaderDemo.app"
79 |             BlueprintName = "RJDownloaderDemo"
80 |             ReferencedContainer = "container:RJDownloaderDemo.xcodeproj">
81 |          </BuildableReference>
82 |       </BuildableProductRunnable>
83 |    </ProfileAction>
84 |    <AnalyzeAction
85 |       buildConfiguration = "Debug">
86 |    </AnalyzeAction>
87 |    <ArchiveAction
88 |       buildConfiguration = "Release"
89 |       revealArchiveInOrganizer = "YES">
90 |    </ArchiveAction>
91 | </Scheme>
92 | 


--------------------------------------------------------------------------------
/RJDownloaderDemo.xcodeproj/xcuserdata/Ryan.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>RJDownloaderDemo.xcscheme</key>
 8 | 		<dict>
 9 | 			<key>orderHint</key>
10 | 			<integer>0</integer>
11 | 		</dict>
12 | 	</dict>
13 | 	<key>SuppressBuildableAutocreation</key>
14 | 	<dict>
15 | 		<key>EE12923E1BFA0A91001C5E4B</key>
16 | 		<dict>
17 | 			<key>primary</key>
18 | 			<true/>
19 | 		</dict>
20 | 	</dict>
21 | </dict>
22 | </plist>
23 | 


--------------------------------------------------------------------------------
/RJDownloaderDemo.xcodeproj/xcuserdata/Rylan.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <Bucket
3 |    type = "1"
4 |    version = "2.0">
5 | </Bucket>
6 | 


--------------------------------------------------------------------------------
/RJDownloaderDemo.xcodeproj/xcuserdata/Rylan.xcuserdatad/xcschemes/RJDownloaderDemo.xcscheme:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <Scheme
 3 |    LastUpgradeVersion = "0710"
 4 |    version = "1.3">
 5 |    <BuildAction
 6 |       parallelizeBuildables = "YES"
 7 |       buildImplicitDependencies = "YES">
 8 |       <BuildActionEntries>
 9 |          <BuildActionEntry
10 |             buildForTesting = "YES"
11 |             buildForRunning = "YES"
12 |             buildForProfiling = "YES"
13 |             buildForArchiving = "YES"
14 |             buildForAnalyzing = "YES">
15 |             <BuildableReference
16 |                BuildableIdentifier = "primary"
17 |                BlueprintIdentifier = "EE12923E1BFA0A91001C5E4B"
18 |                BuildableName = "RJDownloaderDemo.app"
19 |                BlueprintName = "RJDownloaderDemo"
20 |                ReferencedContainer = "container:RJDownloaderDemo.xcodeproj">
21 |             </BuildableReference>
22 |          </BuildActionEntry>
23 |       </BuildActionEntries>
24 |    </BuildAction>
25 |    <TestAction
26 |       buildConfiguration = "Debug"
27 |       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
28 |       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
29 |       shouldUseLaunchSchemeArgsEnv = "YES">
30 |       <Testables>
31 |       </Testables>
32 |       <MacroExpansion>
33 |          <BuildableReference
34 |             BuildableIdentifier = "primary"
35 |             BlueprintIdentifier = "EE12923E1BFA0A91001C5E4B"
36 |             BuildableName = "RJDownloaderDemo.app"
37 |             BlueprintName = "RJDownloaderDemo"
38 |             ReferencedContainer = "container:RJDownloaderDemo.xcodeproj">
39 |          </BuildableReference>
40 |       </MacroExpansion>
41 |       <AdditionalOptions>
42 |       </AdditionalOptions>
43 |    </TestAction>
44 |    <LaunchAction
45 |       buildConfiguration = "Debug"
46 |       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
47 |       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
48 |       launchStyle = "0"
49 |       useCustomWorkingDirectory = "NO"
50 |       ignoresPersistentStateOnLaunch = "NO"
51 |       debugDocumentVersioning = "YES"
52 |       debugServiceExtension = "internal"
53 |       allowLocationSimulation = "YES">
54 |       <BuildableProductRunnable
55 |          runnableDebuggingMode = "0">
56 |          <BuildableReference
57 |             BuildableIdentifier = "primary"
58 |             BlueprintIdentifier = "EE12923E1BFA0A91001C5E4B"
59 |             BuildableName = "RJDownloaderDemo.app"
60 |             BlueprintName = "RJDownloaderDemo"
61 |             ReferencedContainer = "container:RJDownloaderDemo.xcodeproj">
62 |          </BuildableReference>
63 |       </BuildableProductRunnable>
64 |       <AdditionalOptions>
65 |       </AdditionalOptions>
66 |    </LaunchAction>
67 |    <ProfileAction
68 |       buildConfiguration = "Release"
69 |       shouldUseLaunchSchemeArgsEnv = "YES"
70 |       savedToolIdentifier = ""
71 |       useCustomWorkingDirectory = "NO"
72 |       debugDocumentVersioning = "YES">
73 |       <BuildableProductRunnable
74 |          runnableDebuggingMode = "0">
75 |          <BuildableReference
76 |             BuildableIdentifier = "primary"
77 |             BlueprintIdentifier = "EE12923E1BFA0A91001C5E4B"
78 |             BuildableName = "RJDownloaderDemo.app"
79 |             BlueprintName = "RJDownloaderDemo"
80 |             ReferencedContainer = "container:RJDownloaderDemo.xcodeproj">
81 |          </BuildableReference>
82 |       </BuildableProductRunnable>
83 |    </ProfileAction>
84 |    <AnalyzeAction
85 |       buildConfiguration = "Debug">
86 |    </AnalyzeAction>
87 |    <ArchiveAction
88 |       buildConfiguration = "Release"
89 |       revealArchiveInOrganizer = "YES">
90 |    </ArchiveAction>
91 | </Scheme>
92 | 


--------------------------------------------------------------------------------
/RJDownloaderDemo.xcodeproj/xcuserdata/Rylan.xcuserdatad/xcschemes/xcschememanagement.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>SchemeUserState</key>
 6 | 	<dict>
 7 | 		<key>RJDownloaderDemo.xcscheme</key>
 8 | 		<dict>
 9 | 			<key>orderHint</key>
10 | 			<integer>0</integer>
11 | 		</dict>
12 | 	</dict>
13 | 	<key>SuppressBuildableAutocreation</key>
14 | 	<dict>
15 | 		<key>EE12923E1BFA0A91001C5E4B</key>
16 | 		<dict>
17 | 			<key>primary</key>
18 | 			<true/>
19 | 		</dict>
20 | 	</dict>
21 | </dict>
22 | </plist>
23 | 


--------------------------------------------------------------------------------
/RJDownloaderDemo/AppDelegate.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.h
 3 | //  RJDownloaderDemo
 4 | //
 5 | //  Created by Ryan Jin on 11/16/15.
 6 | //  Copyright © 2015 ArcSoft. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | @interface AppDelegate : UIResponder <UIApplicationDelegate>
12 | 
13 | @property (strong, nonatomic) UIWindow *window;
14 | 
15 | 
16 | @end
17 | 
18 | 


--------------------------------------------------------------------------------
/RJDownloaderDemo/AppDelegate.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.m
 3 | //  RJDownloaderDemo
 4 | //
 5 | //  Created by Ryan Jin on 11/16/15.
 6 | //  Copyright © 2015 ArcSoft. All rights reserved.
 7 | //
 8 | 
 9 | #import "AppDelegate.h"
10 | 
11 | @interface AppDelegate ()
12 | 
13 | @end
14 | 
15 | @implementation AppDelegate
16 | 
17 | 
18 | - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
19 |     // Override point for customization after application launch.
20 |     return YES;
21 | }
22 | 
23 | - (void)applicationWillResignActive:(UIApplication *)application {
24 |     // 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.
25 |     // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
26 | }
27 | 
28 | - (void)applicationDidEnterBackground:(UIApplication *)application {
29 |     // 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.
30 |     // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
31 | }
32 | 
33 | - (void)applicationWillEnterForeground:(UIApplication *)application {
34 |     // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
35 | }
36 | 
37 | - (void)applicationDidBecomeActive:(UIApplication *)application {
38 |     // 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.
39 | }
40 | 
41 | - (void)applicationWillTerminate:(UIApplication *)application {
42 |     // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
43 | }
44 | 
45 | @end
46 | 


--------------------------------------------------------------------------------
/RJDownloaderDemo/Assets.xcassets/AppIcon.appiconset/Contents.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "images" : [
 3 |     {
 4 |       "idiom" : "iphone",
 5 |       "size" : "29x29",
 6 |       "scale" : "2x"
 7 |     },
 8 |     {
 9 |       "idiom" : "iphone",
10 |       "size" : "29x29",
11 |       "scale" : "3x"
12 |     },
13 |     {
14 |       "idiom" : "iphone",
15 |       "size" : "40x40",
16 |       "scale" : "2x"
17 |     },
18 |     {
19 |       "idiom" : "iphone",
20 |       "size" : "40x40",
21 |       "scale" : "3x"
22 |     },
23 |     {
24 |       "idiom" : "iphone",
25 |       "size" : "60x60",
26 |       "scale" : "2x"
27 |     },
28 |     {
29 |       "idiom" : "iphone",
30 |       "size" : "60x60",
31 |       "scale" : "3x"
32 |     }
33 |   ],
34 |   "info" : {
35 |     "version" : 1,
36 |     "author" : "xcode"
37 |   }
38 | }


--------------------------------------------------------------------------------
/RJDownloaderDemo/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="8150" systemVersion="15A204g" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" initialViewController="01J-lp-oVM">
 3 |     <dependencies>
 4 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="8122"/>
 5 |     </dependencies>
 6 |     <scenes>
 7 |         <!--View Controller-->
 8 |         <scene sceneID="EHf-IW-A2E">
 9 |             <objects>
10 |                 <viewController id="01J-lp-oVM" sceneMemberID="viewController">
11 |                     <layoutGuides>
12 |                         <viewControllerLayoutGuide type="top" id="Llm-lL-Icb"/>
13 |                         <viewControllerLayoutGuide type="bottom" id="xb3-aO-Qok"/>
14 |                     </layoutGuides>
15 |                     <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
16 |                         <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
17 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
18 |                         <animations/>
19 |                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
20 |                     </view>
21 |                 </viewController>
22 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
23 |             </objects>
24 |             <point key="canvasLocation" x="53" y="375"/>
25 |         </scene>
26 |     </scenes>
27 | </document>
28 | 


--------------------------------------------------------------------------------
/RJDownloaderDemo/Base.lproj/Main.storyboard:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="9059" systemVersion="15B42" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" initialViewController="BYZ-38-t0r">
 3 |     <dependencies>
 4 |         <deployment identifier="iOS"/>
 5 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="9049"/>
 6 |     </dependencies>
 7 |     <scenes>
 8 |         <!--View Controller-->
 9 |         <scene sceneID="tne-QT-ifu">
10 |             <objects>
11 |                 <viewController id="BYZ-38-t0r" customClass="ViewController" sceneMemberID="viewController">
12 |                     <layoutGuides>
13 |                         <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
14 |                         <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
15 |                     </layoutGuides>
16 |                     <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
17 |                         <rect key="frame" x="0.0" y="0.0" width="320" height="568"/>
18 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
19 |                         <subviews>
20 |                             <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="tCG-2a-lBf">
21 |                                 <rect key="frame" x="110" y="170" width="100" height="30"/>
22 |                                 <animations/>
23 |                                 <constraints>
24 |                                     <constraint firstAttribute="width" constant="100" id="ctk-az-8QX"/>
25 |                                 </constraints>
26 |                                 <state key="normal" title="Download"/>
27 |                                 <connections>
28 |                                     <action selector="buttonAction:" destination="BYZ-38-t0r" eventType="touchUpInside" id="GM0-bx-ZTw"/>
29 |                                 </connections>
30 |                             </button>
31 |                             <progressView opaque="NO" contentMode="scaleToFill" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="odB-HM-rKD">
32 |                                 <rect key="frame" x="35" y="300" width="250" height="2"/>
33 |                                 <animations/>
34 |                                 <constraints>
35 |                                     <constraint firstAttribute="width" constant="250" id="hkD-gE-AUq"/>
36 |                                 </constraints>
37 |                             </progressView>
38 |                         </subviews>
39 |                         <animations/>
40 |                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
41 |                         <constraints>
42 |                             <constraint firstItem="tCG-2a-lBf" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="GRC-gR-2dX"/>
43 |                             <constraint firstItem="tCG-2a-lBf" firstAttribute="top" secondItem="y3c-jy-aDJ" secondAttribute="bottom" constant="150" id="Kvi-2P-tWw"/>
44 |                             <constraint firstItem="odB-HM-rKD" firstAttribute="top" secondItem="tCG-2a-lBf" secondAttribute="bottom" constant="100" id="auN-hX-Soy"/>
45 |                             <constraint firstItem="odB-HM-rKD" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="fsr-Jp-TZw"/>
46 |                         </constraints>
47 |                     </view>
48 |                     <connections>
49 |                         <outlet property="button" destination="tCG-2a-lBf" id="Ua0-Wb-V1c"/>
50 |                         <outlet property="progress" destination="odB-HM-rKD" id="mwb-0l-kcr"/>
51 |                     </connections>
52 |                 </viewController>
53 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
54 |             </objects>
55 |             <point key="canvasLocation" x="232" y="406"/>
56 |         </scene>
57 |     </scenes>
58 | </document>
59 | 


--------------------------------------------------------------------------------
/RJDownloaderDemo/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>en</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>CFBundleSignature</key>
20 | 	<string>????</string>
21 | 	<key>CFBundleVersion</key>
22 | 	<string>1</string>
23 | 	<key>LSRequiresIPhoneOS</key>
24 | 	<true/>
25 | 	<key>NSAppTransportSecurity</key>
26 | 	<dict>
27 | 		<key>NSAllowsArbitraryLoads</key>
28 | 		<true/>
29 | 	</dict>
30 | 	<key>UILaunchStoryboardName</key>
31 | 	<string>LaunchScreen</string>
32 | 	<key>UIMainStoryboardFile</key>
33 | 	<string>Main</string>
34 | 	<key>UIRequiredDeviceCapabilities</key>
35 | 	<array>
36 | 		<string>armv7</string>
37 | 	</array>
38 | 	<key>UISupportedInterfaceOrientations</key>
39 | 	<array>
40 | 		<string>UIInterfaceOrientationPortrait</string>
41 | 	</array>
42 | </dict>
43 | </plist>
44 | 


--------------------------------------------------------------------------------
/RJDownloaderDemo/RJHTTPDownloader/RJHTTPDownloader.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  RJHTTPDownloader.h
 3 | //  RJDownloaderDemo
 4 | //
 5 | //  Created by Ryan Jin on 11/2/15.
 6 | //  Copyright (c) 2015 ArcSoft. All rights reserved.
 7 | //
 8 | 
 9 | #import <Foundation/Foundation.h>
10 | 
11 | @class RJHTTPDownloader;
12 | 
13 | @protocol RJHTTPDownloaderDelegate<NSObject>
14 | 
15 | @optional
16 | 
17 | - (void)RJHTTPDownloader:(RJHTTPDownloader *)downloader downloadProgress:(double)progress;
18 | - (void)RJHTTPDownloader:(RJHTTPDownloader *)downloader didFinishWithData:(NSData *)data;
19 | - (void)RJHTTPDownloader:(RJHTTPDownloader *)downloader didFailWithError:(NSError *)error;
20 | 
21 | @end
22 | 
23 | @interface RJHTTPDownloader : NSOperation
24 | 
25 | - (id)initWithRequestURL:(NSURL *)URL delegate:(id<RJHTTPDownloaderDelegate>)delegate;
26 | - (id)initWithRequestURL:(NSURL *)URL
27 |                 progress:(void (^)(float percent))progress
28 |               completion:(void (^)(id response, NSError *error))completion;
29 | 
30 | @end
31 | 


--------------------------------------------------------------------------------
/RJDownloaderDemo/RJHTTPDownloader/RJHTTPDownloader.m:
--------------------------------------------------------------------------------
  1 | //
  2 | //  RJHTTPDownloader.m
  3 | //  RJDownloaderDemo
  4 | //
  5 | //  Created by Ryan Jin on 11/2/15.
  6 | //  Copyright (c) 2015 ArcSoft. All rights reserved.
  7 | //
  8 | 
  9 | #import "RJHTTPDownloader.h"
 10 | 
 11 | #define DELEGATE_HAS_METHOD(delegate, method) delegate && [delegate respondsToSelector:@selector(method)]
 12 | 
 13 | typedef NS_ENUM(NSInteger, RJRequestState) {
 14 |     RJRequestStateReady     = 0,
 15 |     RJRequestStateExecuting = 1,
 16 |     RJRequestStateFinished  = 2,
 17 | };
 18 | 
 19 | static const NSTimeInterval kRequestTimeout = 20.f;
 20 | 
 21 | @interface RJHTTPDownloader ()
 22 | 
 23 | @property (nonatomic, strong) NSMutableData *fileData;
 24 | @property (nonatomic, strong) NSMutableURLRequest *request;
 25 | @property (nonatomic, strong) NSURLConnection *connection;
 26 | 
 27 | @property (nonatomic, assign) float expectedLength;
 28 | @property (nonatomic, assign) float receivedLength;
 29 | @property (nonatomic, assign) RJRequestState state;
 30 | @property (nonatomic, assign) CFRunLoopRef operationRunLoop;
 31 | 
 32 | @property (nonatomic, weak) id <RJHTTPDownloaderDelegate> delegate;
 33 | @property (nonatomic, copy) void (^completion)(id response, NSError *error);
 34 | @property (nonatomic, copy) void (^progress)(float percent);
 35 | 
 36 | @end
 37 | 
 38 | @implementation RJHTTPDownloader
 39 | @synthesize state = _state;
 40 | 
 41 | #pragma mark - Initialize Methods
 42 | - (id)initWithRequestURL:(NSURL *)URL delegate:(id<RJHTTPDownloaderDelegate>)delegate
 43 | {
 44 |     return [self initWithRequestURL:URL delegate:delegate progress:nil completion:nil];
 45 | }
 46 | 
 47 | - (id)initWithRequestURL:(NSURL *)URL
 48 |                 progress:(void (^)(float percent))progress
 49 |               completion:(void (^)(id response, NSError *error))completion
 50 | {
 51 |     return [self initWithRequestURL:URL delegate:nil progress:progress completion:completion];
 52 | }
 53 | 
 54 | - (id)initWithRequestURL:(NSURL *)URL
 55 |                 delegate:(id<RJHTTPDownloaderDelegate>)delegate
 56 |                 progress:(void (^)(float percent))progress
 57 |               completion:(void (^)(id response, NSError *error))completion
 58 | {
 59 |     if (self = [super init]) {
 60 |         self.delegate   = delegate;
 61 |         self.progress   = progress;
 62 |         self.completion = completion;
 63 |         
 64 |         self.request = [NSMutableURLRequest requestWithURL:URL
 65 |                                                cachePolicy:NSURLRequestReloadIgnoringCacheData
 66 |                                            timeoutInterval:kRequestTimeout];
 67 |     }
 68 |     return self;
 69 | }
 70 | 
 71 | - (void)dealloc
 72 | {
 73 |     [self.connection cancel];
 74 | }
 75 | 
 76 | #pragma mark - NSOperation Methods
 77 | - (void)start
 78 | {
 79 |     if (self.isCancelled) { [self finish]; return; }
 80 |     
 81 |     /*
 82 |     if (![NSThread isMainThread])
 83 |     {
 84 |         [self performSelectorOnMainThread:@selector(start)
 85 |                                withObject:nil
 86 |                             waitUntilDone:NO];
 87 |         return;
 88 |     }
 89 |     
 90 |     or
 91 |      
 92 |     [[NSOperationQueue mainQueue] addOperationWithBlock:^{
 93 |         self.connection = [NSURLConnection connectionWithRequest:self.request delegate:self];
 94 |     }];
 95 |     */
 96 |     
 97 |     [self willChangeValueForKey:@"isExecuting"];
 98 |     self.state = RJRequestStateExecuting;
 99 |     [self didChangeValueForKey:@"isExecuting"];
100 |     
101 |     self.connection = [[NSURLConnection alloc] initWithRequest:self.request
102 |                                                       delegate:self
103 |                                               startImmediately:NO];
104 |     
105 |     NSOperationQueue *currentQueue = [NSOperationQueue currentQueue];
106 |     BOOL backgroundQueue           = (currentQueue != nil && currentQueue != [NSOperationQueue mainQueue]);
107 |     NSRunLoop *targetRunLoop       = (backgroundQueue)?[NSRunLoop currentRunLoop]:[NSRunLoop mainRunLoop];
108 | 
109 |     [self.connection scheduleInRunLoop:targetRunLoop forMode:NSRunLoopCommonModes];
110 |     [self.connection start];
111 | 
112 |     // make NSRunLoop stick around until operation is finished
113 |     if (backgroundQueue) {
114 |         self.operationRunLoop = CFRunLoopGetCurrent(); CFRunLoopRun();
115 |     }
116 | }
117 | 
118 | - (void)cancel
119 | {
120 |     if (![self isExecuting]) return;
121 |     
122 |     [super cancel]; [self finish];
123 | }
124 | 
125 | - (BOOL)isConcurrent
126 | {
127 |     return YES;
128 | }
129 | 
130 | - (BOOL)isFinished
131 | {
132 |     return self.state == RJRequestStateFinished;
133 | }
134 | 
135 | - (BOOL)isExecuting
136 | {
137 |     return self.state == RJRequestStateExecuting;
138 | }
139 | 
140 | #pragma mark - Request Status
141 | - (void)finish
142 | {
143 |     [self.connection cancel]; self.connection = nil;
144 |     
145 |     [self willChangeValueForKey:@"isExecuting"];
146 |     [self willChangeValueForKey:@"isFinished"];
147 |     self.state = RJRequestStateFinished;
148 |     [self didChangeValueForKey:@"isExecuting"];
149 |     [self didChangeValueForKey:@"isFinished"];
150 | }
151 | 
152 | - (RJRequestState)state
153 | {
154 |     @synchronized(self) {
155 |         return _state;
156 |     }
157 | }
158 | 
159 | - (void)setState:(RJRequestState)newState
160 | {
161 |     @synchronized(self) {
162 |         [self willChangeValueForKey:@"state"];
163 |         _state = newState;
164 |         [self didChangeValueForKey:@"state"];
165 |     }
166 | }
167 | 
168 | #pragma mark - NSURLConnectionDelegate
169 | - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
170 | {
171 |     self.expectedLength = response.expectedContentLength;
172 |     self.receivedLength = 0;
173 |     self.fileData       = [NSMutableData data];
174 | }
175 | 
176 | - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
177 | {
178 |     [self.fileData appendData:data]; self.receivedLength += data.length;
179 | 
180 |     float percent = self.receivedLength / self.expectedLength;
181 |     
182 |     if (self.progress) self.progress(percent);
183 |     
184 |     if (DELEGATE_HAS_METHOD(self.delegate, RJHTTPDownloader:downloadProgress:)) {
185 |         [self.delegate RJHTTPDownloader:self downloadProgress:percent];
186 |     }
187 | }
188 | 
189 | - (void)connectionDidFinishLoading:(NSURLConnection *)connection
190 | {
191 |     [self downloadFinishedWithResponse:self.fileData error:nil];
192 | }
193 | 
194 | - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
195 | {
196 |     [self downloadFinishedWithResponse:nil error:error];
197 | }
198 | 
199 | #pragma mark - Download Finished
200 | - (void)downloadFinishedWithResponse:(id)response error:(NSError *)error
201 | {
202 |     if (self.operationRunLoop) CFRunLoopStop(self.operationRunLoop);
203 | 
204 |     if (self.isCancelled) return;
205 |     
206 |     if (self.completion) self.completion(self.fileData, error);
207 | 
208 |     if (response && DELEGATE_HAS_METHOD(self.delegate, RJHTTPDownloader:didFinishWithData:))
209 |     {
210 |         [self.delegate RJHTTPDownloader:self didFinishWithData:response];
211 |     }
212 |     else if (!response && DELEGATE_HAS_METHOD(self.delegate, RJHTTPDownloader:didFailWithError:))
213 |     {
214 |         [self.delegate RJHTTPDownloader:self didFailWithError:error];
215 |     }
216 | 
217 |     [self finish];
218 | }
219 | 
220 | @end
221 | 


--------------------------------------------------------------------------------
/RJDownloaderDemo/ViewController.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  ViewController.h
 3 | //  RJDownloaderDemo
 4 | //
 5 | //  Created by Ryan Jin on 11/16/15.
 6 | //  Copyright © 2015 ArcSoft. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | @interface ViewController : UIViewController
12 | 
13 | 
14 | @end
15 | 
16 | 


--------------------------------------------------------------------------------
/RJDownloaderDemo/ViewController.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  ViewController.m
 3 | //  RJDownloaderDemo
 4 | //
 5 | //  Created by Ryan Jin on 11/16/15.
 6 | //  Copyright © 2015 ArcSoft. All rights reserved.
 7 | //
 8 | 
 9 | #import "ViewController.h"
10 | #import "RJHTTPDownloader.h"
11 | 
12 | NSString * const URL_STRING = @"http://sanjosetransit.com/extras/SJTransit_Icons.zip";
13 | 
14 | @interface ViewController ()
15 | 
16 | @property (nonatomic, strong) RJHTTPDownloader *downloader;
17 | @property (nonatomic, strong) NSOperationQueue *operationQueue;
18 | 
19 | @property (nonatomic, weak) IBOutlet UIButton *button;
20 | @property (nonatomic, weak) IBOutlet UIProgressView *progress;
21 | 
22 | @end
23 | 
24 | @implementation ViewController
25 | 
26 | - (void)viewDidLoad
27 | {
28 |     [super viewDidLoad];
29 |     // Do any additional setup after loading the view, typically from a nib.
30 |     self.operationQueue = [[NSOperationQueue alloc] init];
31 |     self.operationQueue.maxConcurrentOperationCount = 1;
32 |     
33 | }
34 | 
35 | - (IBAction)buttonAction:(UIButton *)sender
36 | {
37 |     if ([sender.titleLabel.text isEqualToString:@"Download"]) {
38 |         [self.button setTitle:@"Cancel" forState:UIControlStateNormal];
39 |         self.progress.progress = 0.f;
40 | 
41 |         NSURL *URL = [NSURL URLWithString:URL_STRING];
42 |         self.downloader = [[RJHTTPDownloader alloc] initWithRequestURL:URL progress:^(float percent) {
43 |             dispatch_async(dispatch_get_main_queue(), ^{
44 |                 self.progress.progress = percent;
45 |             });
46 |         } completion:^(id response, NSError *error) {
47 |             dispatch_async(dispatch_get_main_queue(), ^{
48 |                 [self.button setTitle:@"Download" forState:UIControlStateNormal];
49 |                 if (error) self.progress.progress = 0.f;
50 |             });
51 |         }];
52 |         
53 |         [self.operationQueue addOperation:self.downloader];
54 |         [self.operationQueue addOperationWithBlock:^{
55 |             NSLog(@"next operation");
56 |         }];
57 |     }
58 |     else {
59 |         [self.button setTitle:@"Download" forState:UIControlStateNormal];
60 |         self.progress.progress = 0.f; [self.downloader cancel];
61 |     }
62 | }
63 | 
64 | - (void)didReceiveMemoryWarning {
65 |     [super didReceiveMemoryWarning];
66 |     // Dispose of any resources that can be recreated.
67 | }
68 | 
69 | @end
70 | 


--------------------------------------------------------------------------------
/RJDownloaderDemo/main.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  main.m
 3 | //  RJDownloaderDemo
 4 | //
 5 | //  Created by Ryan Jin on 11/16/15.
 6 | //  Copyright © 2015 ArcSoft. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | #import "AppDelegate.h"
11 | 
12 | int main(int argc, char * argv[]) {
13 |     @autoreleasepool {
14 |         return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
15 |     }
16 | }
17 | 


--------------------------------------------------------------------------------