├── README.md
└── UIImageDemon
    ├── UIImageDemon.xcodeproj
        └── project.pbxproj
    └── UIImageDemon
        ├── AppDelegate.swift
        ├── Assets.xcassets
            ├── AccentColor.colorset
            │   └── Contents.json
            ├── AppIcon.appiconset
            │   └── Contents.json
            └── Contents.json
        ├── Base.lproj
            ├── LaunchScreen.storyboard
            └── Main.storyboard
        ├── Info.plist
        ├── SceneDelegate.swift
        ├── UIImage+.swift
        ├── UIImage+SubjectColor.h
        ├── UIImage+SubjectColor.m
        ├── UIImageDemon-Bridging-Header.h
        └── ViewController.swift


/README.md:
--------------------------------------------------------------------------------
1 | # UIImageSubjectColor
2 | Get the theme color of the image (OC and swift)
3 | 


--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
/UIImageDemon/UIImageDemon/AppDelegate.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.swift
 3 | //  UIImageDemon
 4 | //
 5 | //  Created by lzwk_lanlin on 2021/11/24.
 6 | //
 7 | 
 8 | import UIKit
 9 | 
10 | @main
11 | class AppDelegate: UIResponder, UIApplicationDelegate {
12 | 
13 | 
14 | 
15 |     func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
16 |         // Override point for customization after application launch.
17 |         return true
18 |     }
19 | 
20 |     // MARK: UISceneSession Lifecycle
21 | 
22 |     func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
23 |         // Called when a new scene session is being created.
24 |         // Use this method to select a configuration to create the new scene with.
25 |         return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)
26 |     }
27 | 
28 |     func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>) {
29 |         // Called when the user discards a scene session.
30 |         // If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.
31 |         // Use this method to release any resources that were specific to the discarded scenes, as they will not return.
32 |     }
33 | 
34 | 
35 | }
36 | 
37 | 


--------------------------------------------------------------------------------
/UIImageDemon/UIImageDemon/Assets.xcassets/AccentColor.colorset/Contents.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "colors" : [
 3 |     {
 4 |       "idiom" : "universal"
 5 |     }
 6 |   ],
 7 |   "info" : {
 8 |     "author" : "xcode",
 9 |     "version" : 1
10 |   }
11 | }
12 | 


--------------------------------------------------------------------------------
/UIImageDemon/UIImageDemon/Assets.xcassets/AppIcon.appiconset/Contents.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "images" : [
 3 |     {
 4 |       "idiom" : "iphone",
 5 |       "scale" : "2x",
 6 |       "size" : "20x20"
 7 |     },
 8 |     {
 9 |       "idiom" : "iphone",
10 |       "scale" : "3x",
11 |       "size" : "20x20"
12 |     },
13 |     {
14 |       "idiom" : "iphone",
15 |       "scale" : "2x",
16 |       "size" : "29x29"
17 |     },
18 |     {
19 |       "idiom" : "iphone",
20 |       "scale" : "3x",
21 |       "size" : "29x29"
22 |     },
23 |     {
24 |       "idiom" : "iphone",
25 |       "scale" : "2x",
26 |       "size" : "40x40"
27 |     },
28 |     {
29 |       "idiom" : "iphone",
30 |       "scale" : "3x",
31 |       "size" : "40x40"
32 |     },
33 |     {
34 |       "idiom" : "iphone",
35 |       "scale" : "2x",
36 |       "size" : "60x60"
37 |     },
38 |     {
39 |       "idiom" : "iphone",
40 |       "scale" : "3x",
41 |       "size" : "60x60"
42 |     },
43 |     {
44 |       "idiom" : "ipad",
45 |       "scale" : "1x",
46 |       "size" : "20x20"
47 |     },
48 |     {
49 |       "idiom" : "ipad",
50 |       "scale" : "2x",
51 |       "size" : "20x20"
52 |     },
53 |     {
54 |       "idiom" : "ipad",
55 |       "scale" : "1x",
56 |       "size" : "29x29"
57 |     },
58 |     {
59 |       "idiom" : "ipad",
60 |       "scale" : "2x",
61 |       "size" : "29x29"
62 |     },
63 |     {
64 |       "idiom" : "ipad",
65 |       "scale" : "1x",
66 |       "size" : "40x40"
67 |     },
68 |     {
69 |       "idiom" : "ipad",
70 |       "scale" : "2x",
71 |       "size" : "40x40"
72 |     },
73 |     {
74 |       "idiom" : "ipad",
75 |       "scale" : "1x",
76 |       "size" : "76x76"
77 |     },
78 |     {
79 |       "idiom" : "ipad",
80 |       "scale" : "2x",
81 |       "size" : "76x76"
82 |     },
83 |     {
84 |       "idiom" : "ipad",
85 |       "scale" : "2x",
86 |       "size" : "83.5x83.5"
87 |     },
88 |     {
89 |       "idiom" : "ios-marketing",
90 |       "scale" : "1x",
91 |       "size" : "1024x1024"
92 |     }
93 |   ],
94 |   "info" : {
95 |     "author" : "xcode",
96 |     "version" : 1
97 |   }
98 | }
99 | 


--------------------------------------------------------------------------------
/UIImageDemon/UIImageDemon/Assets.xcassets/Contents.json:
--------------------------------------------------------------------------------
1 | {
2 |   "info" : {
3 |     "author" : "xcode",
4 |     "version" : 1
5 |   }
6 | }
7 | 


--------------------------------------------------------------------------------
/UIImageDemon/UIImageDemon/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" 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" xcode11CocoaTouchSystemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>
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 | 


--------------------------------------------------------------------------------
/UIImageDemon/UIImageDemon/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="13122.16" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
 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="tne-QT-ifu">
11 |             <objects>
12 |                 <viewController id="BYZ-38-t0r" customClass="ViewController" customModuleProvider="target" sceneMemberID="viewController">
13 |                     <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
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" xcode11CocoaTouchSystemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>
17 |                         <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
18 |                     </view>
19 |                 </viewController>
20 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
21 |             </objects>
22 |         </scene>
23 |     </scenes>
24 | </document>
25 | 


--------------------------------------------------------------------------------
/UIImageDemon/UIImageDemon/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>UIApplicationSceneManifest</key>
 6 | 	<dict>
 7 | 		<key>UIApplicationSupportsMultipleScenes</key>
 8 | 		<false/>
 9 | 		<key>UISceneConfigurations</key>
10 | 		<dict>
11 | 			<key>UIWindowSceneSessionRoleApplication</key>
12 | 			<array>
13 | 				<dict>
14 | 					<key>UISceneConfigurationName</key>
15 | 					<string>Default Configuration</string>
16 | 					<key>UISceneDelegateClassName</key>
17 | 					<string>$(PRODUCT_MODULE_NAME).SceneDelegate</string>
18 | 					<key>UISceneStoryboardFile</key>
19 | 					<string>Main</string>
20 | 				</dict>
21 | 			</array>
22 | 		</dict>
23 | 	</dict>
24 | </dict>
25 | </plist>
26 | 


--------------------------------------------------------------------------------
/UIImageDemon/UIImageDemon/SceneDelegate.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  SceneDelegate.swift
 3 | //  UIImageDemon
 4 | //
 5 | //  Created by lzwk_lanlin on 2021/11/24.
 6 | //
 7 | 
 8 | import UIKit
 9 | 
10 | class SceneDelegate: UIResponder, UIWindowSceneDelegate {
11 | 
12 |     var window: UIWindow?
13 | 
14 | 
15 |     func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
16 |         // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
17 |         // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
18 |         // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
19 |         guard let _ = (scene as? UIWindowScene) else { return }
20 |     }
21 | 
22 |     func sceneDidDisconnect(_ scene: UIScene) {
23 |         // Called as the scene is being released by the system.
24 |         // This occurs shortly after the scene enters the background, or when its session is discarded.
25 |         // Release any resources associated with this scene that can be re-created the next time the scene connects.
26 |         // The scene may re-connect later, as its session was not necessarily discarded (see `application:didDiscardSceneSessions` instead).
27 |     }
28 | 
29 |     func sceneDidBecomeActive(_ scene: UIScene) {
30 |         // Called when the scene has moved from an inactive state to an active state.
31 |         // Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
32 |     }
33 | 
34 |     func sceneWillResignActive(_ scene: UIScene) {
35 |         // Called when the scene will move from an active state to an inactive state.
36 |         // This may occur due to temporary interruptions (ex. an incoming phone call).
37 |     }
38 | 
39 |     func sceneWillEnterForeground(_ scene: UIScene) {
40 |         // Called as the scene transitions from the background to the foreground.
41 |         // Use this method to undo the changes made on entering the background.
42 |     }
43 | 
44 |     func sceneDidEnterBackground(_ scene: UIScene) {
45 |         // Called as the scene transitions from the foreground to the background.
46 |         // Use this method to save data, release shared resources, and store enough scene-specific state information
47 |         // to restore the scene back to its current state.
48 |     }
49 | 
50 | 
51 | }
52 | 
53 | 


--------------------------------------------------------------------------------
/UIImageDemon/UIImageDemon/UIImage+.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  UIImage+.swift
 3 | //  UIImageDemon
 4 | //
 5 | //  Created by lzwk_lanlin on 2021/11/24.
 6 | //
 7 | 
 8 | import Foundation
 9 | import UIKit
10 | 
11 | public extension UIImage {
12 |     func subjectColor(_ completion: @escaping (_ color: UIColor?) -> Void){
13 |       DispatchQueue.global().async {
14 |         if self.cgImage == nil {
15 |             DispatchQueue.main.async {
16 |                 return completion(nil)
17 |             }
18 |         }
19 |         let bitmapInfo = CGBitmapInfo(rawValue: 0).rawValue | CGImageAlphaInfo.premultipliedLast.rawValue
20 |           
21 |         // 第一步 先把图片缩小 加快计算速度. 但越小结果误差可能越大
22 |         let thumbSize = CGSize(width: 40 , height: 40)
23 |         let colorSpace = CGColorSpaceCreateDeviceRGB()
24 |         guard let context = CGContext(data: nil,
25 |                                       width: Int(thumbSize.width),
26 |                                       height: Int(thumbSize.height),
27 |                                       bitsPerComponent: 8,
28 |                                       bytesPerRow: Int(thumbSize.width) * 4 ,
29 |                                       space: colorSpace,
30 |                                       bitmapInfo: bitmapInfo) else { return completion(nil) }
31 |           
32 |         let drawRect = CGRect(x: 0, y: 0, width: thumbSize.width, height: thumbSize.height)
33 |         context.draw(self.cgImage! , in: drawRect)
34 |           
35 |         // 第二步 取每个点的像素值
36 |         if context.data == nil{ return completion(nil)}
37 |         let countedSet = NSCountedSet(capacity: Int(thumbSize.width * thumbSize.height))
38 |         for x in 0 ..< Int(thumbSize.width) {
39 |             for y in 0 ..< Int(thumbSize.height){
40 |                 let offset = 4 * x * y
41 |                 let red = context.data!.load(fromByteOffset: offset, as: UInt8.self)
42 |                 let green = context.data!.load(fromByteOffset: offset + 1, as: UInt8.self)
43 |                 let blue = context.data!.load(fromByteOffset: offset + 2, as: UInt8.self)
44 |                 let alpha = context.data!.load(fromByteOffset: offset + 3, as: UInt8.self)
45 |                 // 过滤透明的、基本白色、基本黑色
46 |                 if alpha > 0 && (red < 250 && green < 250 && blue < 250) && (red > 5 && green > 5 && blue > 5) {
47 |                     let array = [red,green,blue,alpha]
48 |                     countedSet.add(array)
49 |                 }
50 |             }
51 |         }
52 |           
53 |         //第三步 找到出现次数最多的那个颜色
54 |         let enumerator = countedSet.objectEnumerator()
55 |         var maxColor: [Int] = []
56 |         var maxCount = 0
57 |         while let curColor = enumerator.nextObject() as? [Int] , !curColor.isEmpty {
58 |             let tmpCount = countedSet.count(for: curColor)
59 |             if tmpCount < maxCount { continue }
60 |             maxCount = tmpCount
61 |             maxColor = curColor
62 |         }
63 |         let color = UIColor(red: CGFloat(maxColor[0]) / 255.0, green: CGFloat(maxColor[1]) / 255.0, blue: CGFloat(maxColor[2]) / 255.0, alpha: CGFloat(maxColor[3]) / 255.0)
64 |         DispatchQueue.main.async { return completion(color) }
65 |       }
66 |    }
67 | }
68 | 


--------------------------------------------------------------------------------
/UIImageDemon/UIImageDemon/UIImage+SubjectColor.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  UIImage+SubjectColor.h
 3 | //  WatermarkAPP
 4 | //
 5 | //  Created by lzwk_lanlin on 2021/11/24.
 6 | //
 7 | 
 8 | #import <UIKit/UIKit.h>
 9 | 
10 | @interface UIImage (SubjectColor)
11 | 
12 | -(void)getSubjectColor:(void(^)(UIColor*))callBack;
13 | @end
14 | 
15 | 
16 | 


--------------------------------------------------------------------------------
/UIImageDemon/UIImageDemon/UIImage+SubjectColor.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  UIImage+SubjectColor.m
 3 | //  WatermarkAPP
 4 | //
 5 | //  Created by lzwk_lanlin on 2021/11/24.
 6 | //
 7 | 
 8 | #import "UIImage+SubjectColor.h"
 9 | 
10 | @implementation UIImage (SubjectColor)
11 | //根据图片获取图片的主色调
12 | -(void)getSubjectColor:(void(^)(UIColor*))callBack {
13 |     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
14 |         // 第一步 先把图片缩小 加快计算速度. 但越小结果误差可能越大
15 |         int bitmapInfo = kCGBitmapByteOrderDefault | kCGImageAlphaPremultipliedLast;
16 |         CGSize thumbSize = CGSizeMake(40, 40);
17 |         CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
18 |         CGContextRef context = CGBitmapContextCreate(NULL,thumbSize.width,thumbSize.height, 8, thumbSize.width*4, colorSpace,bitmapInfo);
19 |         CGRect drawRect = CGRectMake(0, 0, thumbSize.width, thumbSize.height);
20 |         CGContextDrawImage(context, drawRect, self.CGImage);
21 |         CGColorSpaceRelease(colorSpace);
22 |         
23 |         // 第二步 取每个点的像素值
24 |         unsigned char* data = CGBitmapContextGetData (context);
25 |         if (data == NULL) {
26 |             dispatch_async(dispatch_get_main_queue(), ^{
27 |                 callBack(nil);
28 |             });
29 |         };
30 |         NSCountedSet* cls = [NSCountedSet setWithCapacity: thumbSize.width * thumbSize.height];
31 |         for (int x = 0; x < thumbSize.width; x++) {
32 |             for (int y = 0; y < thumbSize.height; y++) {
33 |                 int offset = 4 * (x * y);
34 |                 int red = data[offset];
35 |                 int green = data[offset + 1];
36 |                 int blue = data[offset + 2];
37 |                 int alpha =  data[offset + 3];
38 |                 // 过滤透明的、基本白色、基本黑色
39 |                 if (alpha > 0 && (red < 250 && green < 250 && blue < 250) && (red > 5 && green > 5 && blue > 5)) {
40 |                     NSArray *clr = @[@(red),@(green),@(blue),@(alpha)];
41 |                     [cls addObject:clr];
42 |                 }
43 |             }
44 |         }
45 |         CGContextRelease(context);
46 |         
47 |         //第三步 找到出现次数最多的那个颜色
48 |         NSEnumerator *enumerator = [cls objectEnumerator];
49 |         NSArray *curColor = nil;
50 |         NSArray *MaxColor = nil;
51 |         NSUInteger MaxCount = 0;
52 |         while ((curColor = [enumerator nextObject]) != nil){
53 |             NSUInteger tmpCount = [cls countForObject:curColor];
54 |             if ( tmpCount < MaxCount ) continue;
55 |             MaxCount = tmpCount;
56 |             MaxColor = curColor;
57 |         }
58 |         UIColor * subjectColor = [UIColor colorWithRed:([MaxColor[0] intValue]/255.0f) green:([MaxColor[1] intValue]/255.0f) blue:([MaxColor[2] intValue]/255.0f) alpha:([MaxColor[3] intValue]/255.0f)];
59 |         dispatch_async(dispatch_get_main_queue(), ^{
60 |             callBack(subjectColor);
61 |         });
62 |     });
63 | }
64 | 
65 | 
66 | @end
67 | 


--------------------------------------------------------------------------------
/UIImageDemon/UIImageDemon/UIImageDemon-Bridging-Header.h:
--------------------------------------------------------------------------------
1 | //
2 | //  Use this file to import your target's public headers that you would like to expose to Swift.
3 | //
4 | 
5 | #import "UIImage+SubjectColor.h"
6 | 


--------------------------------------------------------------------------------
/UIImageDemon/UIImageDemon/ViewController.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  ViewController.swift
 3 | //  UIImageDemon
 4 | //
 5 | //  Created by lzwk_lanlin on 2021/11/24.
 6 | //
 7 | 
 8 | import UIKit
 9 | 
10 | class ViewController: UIViewController, UIImagePickerControllerDelegate , UINavigationControllerDelegate {
11 |     
12 |     var imagePicker: UIImagePickerController = UIImagePickerController()
13 |     
14 |     var imageView = UIImageView()
15 |     
16 |     override func viewDidLoad() {
17 |         super.viewDidLoad()
18 |         let button = UIButton(type: .system)
19 |         view.addSubview(button)
20 |         button.setTitle("选择照片", for: .normal)
21 |         button.addTarget(self, action: #selector(buttonClick), for: .touchUpInside)
22 |         button.frame = CGRect(x: 10, y: 100, width: 100, height: 20)
23 |   
24 |         view.addSubview(imageView)
25 |         imageView.frame = CGRect(x: 100, y: 150, width: 150, height: 150)
26 |         
27 |         
28 |         imagePicker.delegate = self
29 |         imagePicker.sourceType = .photoLibrary
30 |      
31 |     }
32 |     
33 |     @objc func buttonClick(){
34 |         /// 4. 点击选图片时，展示这个 picker controller
35 |            present(imagePicker, animated: true) {
36 |                print("UIImagePickerController: presented")
37 |            }
38 |     }
39 |     
40 |     func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
41 |         guard let selectedImage = info[UIImagePickerController.InfoKey.originalImage] as? UIImage else { return }
42 |         picker.dismiss(animated: true) { [unowned self] in
43 |             self.imageView.image = selectedImage
44 |             
45 |             // Swift
46 |             selectedImage.subjectColor({[unowned self] color in
47 |                 guard let subjectColor = color else { return }
48 |                     self.view.backgroundColor = subjectColor
49 |             })
50 |             
51 | //            // OC
52 | //            selectedImage.getSubjectColor {[unowned self] color in
53 | //                guard let subjectColor = color else { return }
54 | //                self.view.backgroundColor = subjectColor
55 | //            }
56 |         }
57 |     }
58 | }
59 | 


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