├── DDColorExplorer.xcodeproj
    ├── project.pbxproj
    ├── project.xcworkspace
    │   ├── contents.xcworkspacedata
    │   └── xcuserdata
    │   │   └── admin.xcuserdatad
    │   │       └── UserInterfaceState.xcuserstate
    └── xcuserdata
    │   └── admin.xcuserdatad
    │       ├── xcdebugger
    │           └── Breakpoints_v2.xcbkptlist
    │       └── xcschemes
    │           ├── DDColorExplorer.xcscheme
    │           └── xcschememanagement.plist
├── DDColorExplorer
    ├── AppDelegate.swift
    ├── Assets.xcassets
    │   └── AppIcon.appiconset
    │   │   └── Contents.json
    ├── Base.lproj
    │   ├── LaunchScreen.storyboard
    │   └── Main.storyboard
    ├── Info.plist
    ├── ViewController.swift
    └── test.png
├── README.md
├── Sources
    └── DDColorExplorer.swift
└── demo.gif


/DDColorExplorer.xcodeproj/project.pbxproj:
--------------------------------------------------------------------------------
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/DDColorExplorer/AppDelegate.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.swift
 3 | //  DDColorExplorer
 4 | //
 5 | //  Created by Carrl on 16/1/21.
 6 | //  Copyright © 2016年 monk-studio. All rights reserved.
 7 | //
 8 | 
 9 | import UIKit
10 | 
11 | @UIApplicationMain
12 | class AppDelegate: UIResponder, UIApplicationDelegate {
13 | 
14 |     var window: UIWindow?
15 | 
16 | 
17 |     func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
18 |         // Override point for customization after application launch.
19 |         return true
20 |     }
21 | 
22 |     func applicationWillResignActive(application: UIApplication) {
23 |         // 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.
24 |         // 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.
25 |     }
26 | 
27 |     func applicationDidEnterBackground(application: UIApplication) {
28 |         // 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.
29 |         // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
30 |     }
31 | 
32 |     func applicationWillEnterForeground(application: UIApplication) {
33 |         // 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.
34 |     }
35 | 
36 |     func applicationDidBecomeActive(application: UIApplication) {
37 |         // 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.
38 |     }
39 | 
40 |     func applicationWillTerminate(application: UIApplication) {
41 |         // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
42 |     }
43 | 
44 | 
45 | }
46 | 
47 | 


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/DDColorExplorer/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 | }


--------------------------------------------------------------------------------
/DDColorExplorer/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 | 


--------------------------------------------------------------------------------
/DDColorExplorer/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="6211" systemVersion="14A298i" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
 3 |     <dependencies>
 4 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6204"/>
 5 |     </dependencies>
 6 |     <scenes>
 7 |         <!--View Controller-->
 8 |         <scene sceneID="tne-QT-ifu">
 9 |             <objects>
10 |                 <viewController id="BYZ-38-t0r" customClass="ViewController" customModuleProvider="target" sceneMemberID="viewController">
11 |                     <layoutGuides>
12 |                         <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
13 |                         <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
14 |                     </layoutGuides>
15 |                     <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
16 |                         <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
17 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
18 |                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
19 |                     </view>
20 |                 </viewController>
21 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
22 |             </objects>
23 |         </scene>
24 |     </scenes>
25 | </document>
26 | 


--------------------------------------------------------------------------------
/DDColorExplorer/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>UILaunchStoryboardName</key>
26 | 	<string>LaunchScreen</string>
27 | 	<key>UIMainStoryboardFile</key>
28 | 	<string>Main</string>
29 | 	<key>UIRequiredDeviceCapabilities</key>
30 | 	<array>
31 | 		<string>armv7</string>
32 | 	</array>
33 | 	<key>UISupportedInterfaceOrientations</key>
34 | 	<array>
35 | 		<string>UIInterfaceOrientationPortrait</string>
36 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
37 | 		<string>UIInterfaceOrientationLandscapeRight</string>
38 | 	</array>
39 | </dict>
40 | </plist>
41 | 


--------------------------------------------------------------------------------
/DDColorExplorer/ViewController.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  ViewController.swift
 3 | //  DDColorExplorer
 4 | //
 5 | //  Created by Carrl on 16/1/21.
 6 | //  Copyright © 2016年 monk-studio. All rights reserved.
 7 | //
 8 | 
 9 | import UIKit
10 | 
11 | class ViewController: UIViewController {
12 |     let presentationView = UIView(frame: CGRectMake(0, 20, 50, 50))
13 |     
14 |     let labelRed = UILabel(frame: CGRectMake(0, 70, 100, 20))
15 |     let labelGreen = UILabel(frame: CGRectMake(0, 90, 100, 20))
16 |     let labelBlue = UILabel(frame: CGRectMake(0, 110, 100, 20))
17 |     override func viewDidLoad() {
18 |         super.viewDidLoad()
19 |         let explorerView = DDColorExplorerView(image: UIImage(named: "test.png"))
20 |         explorerView.backgroundColor = UIColor.whiteColor()
21 |         explorerView.frame = self.view.frame
22 |         explorerView.delegate = self
23 |         self.view.addSubview(explorerView)
24 |         
25 |         self.presentationView.layer.zPosition = 100
26 |         presentationView.center.x = self.view.center.x
27 |         self.view.addSubview(presentationView)
28 |         
29 |         for member in [labelRed,labelBlue,labelGreen]{
30 |             member.textColor = UIColor.grayColor()
31 |             member.center.x = self.view.center.x
32 |             member.textAlignment = NSTextAlignment.Center
33 |             self.view.addSubview(member)
34 |         }
35 |     }
36 | 
37 | }
38 | extension ViewController: DDColorExplorerViewDelegate{
39 |     func DDColorExplorerDidDetectColor(color: UIColor) {
40 |         self.presentationView.backgroundColor = color
41 |         self.labelRed.text = "red:\(color.red)"
42 |         self.labelGreen.text = "green:\(color.green)"
43 |         self.labelBlue.text = "blue:\(color.blue)"
44 |     }
45 | }
46 | 
47 | extension UIColor{
48 |     
49 |     var red: Int{
50 |         return Int(CGColorGetComponents(self.CGColor)[0] * 255.0)
51 |     }
52 |     
53 |     var green: Int{
54 |         return Int(CGColorGetComponents(self.CGColor)[1] * 255.0)
55 |     }
56 |     
57 |     var blue: Int{
58 |         return Int(CGColorGetComponents(self.CGColor)[2] * 255.0)
59 |     }
60 |     
61 | }
62 | 


--------------------------------------------------------------------------------
/DDColorExplorer/test.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/wddwycc/DDColorExplorer/1652ad4dd11aa3060d778816273bc8bbab9be9f4/DDColorExplorer/test.png


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | DDColorExplorer
 2 | ---
 3 | 
 4 | ### Demo
 5 | ![demo](https://raw.githubusercontent.com/wddwycc/DDColorExplorer/master/demo.gif)
 6 | 
 7 | 
 8 | ### How To Use
 9 | 1. Copy the file `DDColorExplorer.swift` into your project.
10 | 
11 | 2. Use `DDColorExplorerView` to get the control and `DDColorExplorerViewDelegate` to retrieve color data.
12 | 


--------------------------------------------------------------------------------
/Sources/DDColorExplorer.swift:
--------------------------------------------------------------------------------
  1 | //
  2 | //  DDColorExplorer.swift
  3 | //  DDColorExplorer
  4 | //
  5 | //  Created by Carrl on 16/1/21.
  6 | //  Copyright © 2016年 monk-studio. All rights reserved.
  7 | //
  8 | 
  9 | import UIKit
 10 | 
 11 | protocol DDColorExplorerViewDelegate:class{
 12 |     func DDColorExplorerDidDetectColor(color:UIColor)
 13 | }
 14 | class DDColorExplorerView:UIImageView{
 15 |     
 16 |     private let picker = UIView(frame: CGRectMake(0, 0, 80, 80))
 17 |     private let pickerPresentationLayer = CAShapeLayer()
 18 |     var pickerColor:CGColorRef?{
 19 |         get{
 20 |             return self.pickerPresentationLayer.strokeColor
 21 |         }
 22 |         set(newValue){
 23 |             self.pickerPresentationLayer.strokeColor = newValue
 24 |         }
 25 |     }
 26 |     
 27 |     var context:CGContextRef?
 28 |     
 29 |     let pickerDisappearDuration = 0.6 as Double
 30 |     
 31 |     
 32 |     weak var delegate:DDColorExplorerViewDelegate?
 33 |     
 34 |     override init(image:UIImage?){
 35 |         super.init(image: image)
 36 |         self.contentMode = UIViewContentMode.ScaleAspectFit
 37 |         self.activateColorExploration()
 38 |         if(self.image != nil){
 39 |             self.context = self.createARGBBitmapContext(self.image!.CGImage!)
 40 |         }
 41 |         
 42 |     }
 43 | 
 44 |     required init?(coder aDecoder: NSCoder) {
 45 |         fatalError("init(coder:) has not been implemented")
 46 |     }
 47 |     private func activateColorExploration(){
 48 |         self.userInteractionEnabled = true
 49 |         let panGesture = UIPanGestureRecognizer(target: self, action: "colorExplorerHandlePan:")
 50 |         let tapGesture = UITapGestureRecognizer(target: self, action: "colorExplorerHandleTap:")
 51 |         self.addGestureRecognizer(panGesture)
 52 |         self.addGestureRecognizer(tapGesture)
 53 |         
 54 |         pickerPresentationLayer.frame = self.picker.frame
 55 |         self.picker.layer.addSublayer(pickerPresentationLayer)
 56 |         let pickerPath = CGPathCreateMutable()
 57 |         CGPathAddEllipseInRect(pickerPath, nil, pickerPresentationLayer.frame)
 58 |         pickerPresentationLayer.path = pickerPath
 59 |         pickerPresentationLayer.fillColor = UIColor.clearColor().CGColor
 60 |         pickerPresentationLayer.strokeColor = UIColor.grayColor().CGColor
 61 |         pickerPresentationLayer.lineWidth = 10
 62 |         
 63 |         let centerPointLayer = CAShapeLayer()
 64 |         let centerPointLayerPath = CGPathCreateMutable()
 65 |         CGPathAddEllipseInRect(centerPointLayerPath, nil, CGRectMake(0, 0, 4, 4))
 66 |         centerPointLayer.path = centerPointLayerPath
 67 |         centerPointLayer.strokeColor = UIColor.clearColor().CGColor
 68 |         centerPointLayer.fillColor = UIColor(white: 172.0/255.0, alpha: 1).CGColor
 69 |         centerPointLayer.frame = CGRectMake(80/2 - 2, 80/2 - 2, 4, 4)
 70 |         self.picker.layer.addSublayer(centerPointLayer)
 71 |         
 72 |         self.picker.alpha = 0
 73 |         self.addSubview(self.picker)
 74 |     }
 75 |     func colorExplorerHandlePan(gesture:UIPanGestureRecognizer){
 76 |         let locationInImage = self.covertTouchPositionToImagePixelPosition(gesture.locationInView(self))
 77 |         let color = self.getPixelColorAtLocation(locationInImage)
 78 |         self.pickerColor = color!.CGColor
 79 |         if(color != nil){
 80 |             self.delegate?.DDColorExplorerDidDetectColor(color!)
 81 |         }
 82 |         
 83 |         switch gesture.state{
 84 |         case .Began:
 85 |             self.picker.alpha = 1
 86 |             self.picker.center = gesture.locationInView(self)
 87 |         case .Changed:
 88 |             self.picker.center = gesture.locationInView(self)
 89 |             
 90 |         case .Cancelled, .Ended:
 91 |             UIView.animateWithDuration(self.pickerDisappearDuration, animations: { () -> Void in
 92 |                 self.picker.alpha = 0
 93 |             })
 94 |         default:
 95 |             break
 96 |         }
 97 |     }
 98 |     func colorExplorerHandleTap(gesture:UITapGestureRecognizer){
 99 |         if(gesture.state == .Ended){
100 |             let locationInImage = self.covertTouchPositionToImagePixelPosition(gesture.locationInView(self))
101 |             let color = self.getPixelColorAtLocation(locationInImage)
102 |             self.pickerColor = color!.CGColor
103 |             if(color != nil){
104 |                 self.delegate?.DDColorExplorerDidDetectColor(color!)
105 |             }
106 | 
107 |             
108 |             
109 |             self.picker.center = gesture.locationInView(self)
110 |             self.picker.alpha = 1
111 |             UIView.animateWithDuration(self.pickerDisappearDuration, animations: { () -> Void in
112 |                 self.picker.alpha = 0
113 |             })
114 |         }
115 |     }
116 |     
117 |     func covertTouchPositionToImagePixelPosition(touchPosition:CGPoint)->CGPoint?{
118 |         let imageSize = CGSizeMake(CGFloat(CGImageGetWidth(self.image!.CGImage)), CGFloat(CGImageGetHeight(self.image!.CGImage)))
119 |         
120 |         let explorerViewSize = self.bounds.size
121 |         let presentationRatio = (imageSize.width / explorerViewSize.width > imageSize.height / explorerViewSize.width) ? (imageSize.width / explorerViewSize.width) : (imageSize.height / explorerViewSize.height)
122 |         let presentationSize = CGSizeMake(imageSize.width / presentationRatio, imageSize.height / presentationRatio)
123 |         
124 | 
125 |         if(touchPosition.x < (explorerViewSize.width - presentationSize.width)/2 || touchPosition.x > (explorerViewSize.width + presentationSize.width)/2){
126 |             return nil
127 |         }
128 |         if(touchPosition.y < (explorerViewSize.height - presentationSize.height)/2 || touchPosition.y > (explorerViewSize.height + presentationSize.height)/2){
129 |             return nil
130 |         }
131 |         let leftInset = (explorerViewSize.width - presentationSize.width)/2
132 |         let topInset = (explorerViewSize.height - presentationSize.height)/2
133 |         let targetPositionInExplorerView = CGPointMake(touchPosition.x - leftInset, touchPosition.y - topInset)
134 |         
135 |         let positionInImage = CGPointMake(targetPositionInExplorerView.x * presentationRatio, targetPositionInExplorerView.y * presentationRatio)
136 |         
137 |         return positionInImage
138 |     }
139 |     
140 |     
141 |     private func createARGBBitmapContext(inImage: CGImageRef) -> CGContext {
142 |         
143 |         let pixelsWide = CGImageGetWidth(inImage)
144 |         let pixelsHigh = CGImageGetHeight(inImage)
145 |         
146 |         let bitmapBytesPerRow = Int(pixelsWide) * 4
147 | 
148 |         let colorSpace = CGColorSpaceCreateDeviceRGB()
149 |         
150 |         let bitmapData = UnsafeMutablePointer<UInt8>()
151 |         let bitmapInfo = CGImageAlphaInfo.PremultipliedFirst.rawValue
152 |         
153 |         let context = CGBitmapContextCreate(bitmapData, pixelsWide, pixelsHigh, 8, bitmapBytesPerRow, colorSpace, bitmapInfo)!
154 |         
155 |         return context
156 |     }
157 |     
158 |     private func getPixelColorAtLocation(point:CGPoint?)->UIColor? {
159 |         if(point == nil){
160 |             return self.backgroundColor
161 |         }
162 |         let inImage:CGImageRef = self.image!.CGImage!
163 |         
164 |         let pixelsWide = CGImageGetWidth(inImage)
165 |         let pixelsHigh = CGImageGetHeight(inImage)
166 |         let rect = CGRect(x:0, y:0, width:Int(pixelsWide), height:Int(pixelsHigh))
167 |         
168 |         CGContextClearRect(context, rect)
169 |         
170 |         CGContextDrawImage(context, rect, inImage)
171 |         
172 |         let data = CGBitmapContextGetData(context)
173 |         let dataType = UnsafePointer<UInt8>(data)
174 |         
175 |         let offset = 4*((Int(pixelsWide) * Int(point!.y)) + Int(point!.x))
176 |         let alphaValue = dataType[offset]
177 |         let redColor = dataType[offset+1]
178 |         let greenColor = dataType[offset+2]
179 |         let blueColor = dataType[offset+3]
180 |         
181 |         let redFloat = CGFloat(redColor)/255.0
182 |         let greenFloat = CGFloat(greenColor)/255.0
183 |         let blueFloat = CGFloat(blueColor)/255.0
184 |         let alphaFloat = CGFloat(alphaValue)/255.0
185 |         
186 |         return UIColor(red: redFloat, green: greenFloat, blue: blueFloat, alpha: alphaFloat)
187 |         
188 |         // When finished, release the context
189 |         // Free image data memory for the context
190 |     }
191 | 
192 |     
193 |     
194 | }
195 | 
196 | 
197 | 


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/demo.gif:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/wddwycc/DDColorExplorer/1652ad4dd11aa3060d778816273bc8bbab9be9f4/demo.gif


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