├── KVO演示.xcodeproj
├── xcuserdata
│ ├── _sheng.xcuserdatad
│ │ ├── xcdebugger
│ │ │ └── Breakpoints_v2.xcbkptlist
│ │ └── xcschemes
│ │ │ ├── xcschememanagement.plist
│ │ │ └── KVO演示.xcscheme
│ ├── sheng.xcuserdatad
│ │ └── xcschemes
│ │ │ └── xcschememanagement.plist
│ └── cws.xcuserdatad
│ │ └── xcschemes
│ │ └── xcschememanagement.plist
├── project.xcworkspace
│ ├── xcuserdata
│ │ ├── cws.xcuserdatad
│ │ │ └── UserInterfaceState.xcuserstate
│ │ ├── sheng.xcuserdatad
│ │ │ └── UserInterfaceState.xcuserstate
│ │ └── _sheng.xcuserdatad
│ │ │ └── UserInterfaceState.xcuserstate
│ ├── contents.xcworkspacedata
│ └── xcshareddata
│ │ └── IDEWorkspaceChecks.plist
└── project.pbxproj
├── KVO演示
├── MyKVOModel.m
├── AppDelegate.h
├── MyKVOModel.h
├── ViewController.h
├── main.m
├── Assets.xcassets
│ └── AppIcon.appiconset
│ │ └── Contents.json
├── Info.plist
├── Base.lproj
│ ├── LaunchScreen.storyboard
│ └── Main.storyboard
├── AppDelegate.m
└── ViewController.m
└── README.md
/KVO演示.xcodeproj/xcuserdata/_sheng.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist:
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/KVO演示.xcodeproj/project.xcworkspace/xcuserdata/cws.xcuserdatad/UserInterfaceState.xcuserstate:
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https://raw.githubusercontent.com/Azuo520/KVO-Demo/HEAD/KVO演示.xcodeproj/project.xcworkspace/xcuserdata/cws.xcuserdatad/UserInterfaceState.xcuserstate
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/KVO演示.xcodeproj/project.xcworkspace/xcuserdata/sheng.xcuserdatad/UserInterfaceState.xcuserstate:
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https://raw.githubusercontent.com/Azuo520/KVO-Demo/HEAD/KVO演示.xcodeproj/project.xcworkspace/xcuserdata/sheng.xcuserdatad/UserInterfaceState.xcuserstate
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/KVO演示.xcodeproj/project.xcworkspace/xcuserdata/_sheng.xcuserdatad/UserInterfaceState.xcuserstate:
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https://raw.githubusercontent.com/Azuo520/KVO-Demo/HEAD/KVO演示.xcodeproj/project.xcworkspace/xcuserdata/_sheng.xcuserdatad/UserInterfaceState.xcuserstate
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/KVO演示.xcodeproj/project.xcworkspace/contents.xcworkspacedata:
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/KVO演示/MyKVOModel.m:
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1 | //
2 | // MyKVOModel.m
3 | // KVO演示
4 | //
5 | // Created by cws on 2020/4/13.
6 | // Copyright © 2020 Azuo. All rights reserved.
7 | //
8 |
9 | #import "MyKVOModel.h"
10 |
11 | @implementation MyKVOModel
12 |
13 | @end
14 |
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/KVO演示.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist:
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2 |
3 |
4 |
5 | IDEDidComputeMac32BitWarning
6 |
7 |
8 |
9 |
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/README.md:
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1 | ## 前言
2 | KVO演示-Demo。
3 | ###本次开发环境
4 | Xcode: 7.2
5 | iOS Simulator: iphone6
6 | ### 内容
7 |
8 | iOS--KVO的实现原理与具体应用_Demo：
9 | 2个类之间的通信。
10 |
11 | ### 啊左的博客
12 |
13 | 博客园：http://www.cnblogs.com/azuo/
14 | ##
15 | 简书：http://www.jianshu.com/users/a46bde0697f4/latest_articles
16 | ##
17 | 啊左，稀罕iOS开发，也稀罕摄影。欢迎访问、欢迎交流~
18 |
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/KVO演示/AppDelegate.h:
--------------------------------------------------------------------------------
1 | //
2 | // AppDelegate.h
3 | // KVO演示
4 | //
5 | // Created by zuoA on 16/4/27.
6 | // Copyright © 2016年 Azuo. All rights reserved.
7 | //
8 |
9 | #import
10 |
11 | @interface AppDelegate : UIResponder
12 |
13 | @property (strong, nonatomic) UIWindow *window;
14 |
15 |
16 | @end
17 |
18 |
--------------------------------------------------------------------------------
/KVO演示/MyKVOModel.h:
--------------------------------------------------------------------------------
1 | //
2 | // MyKVOModel.h
3 | // KVO演示
4 | //
5 | // Created by cws on 2020/4/13.
6 | // Copyright © 2020 Azuo. All rights reserved.
7 | //
8 |
9 | #import
10 |
11 | NS_ASSUME_NONNULL_BEGIN
12 |
13 | @interface MyKVOModel : NSObject
14 |
15 | @property (nonatomic, assign) int num;
16 |
17 | @end
18 |
19 | NS_ASSUME_NONNULL_END
20 |
--------------------------------------------------------------------------------
/KVO演示/ViewController.h:
--------------------------------------------------------------------------------
1 | //
2 | // ViewController.h
3 | // KVO演示
4 | //
5 | // Created by zuoA on 16/4/27.
6 | // Copyright © 2016年 Azuo. All rights reserved.
7 | //
8 |
9 | #import
10 |
11 | @interface ViewController : UIViewController
12 |
13 | @property (weak, nonatomic) IBOutlet UILabel *label;
14 |
15 | - (IBAction)changeNum:(UIButton *)sender;
16 |
17 | @end
18 |
19 |
--------------------------------------------------------------------------------
/KVO演示/main.m:
--------------------------------------------------------------------------------
1 | //
2 | // main.m
3 | // KVO演示
4 | //
5 | // Created by zuoA on 16/4/27.
6 | // Copyright © 2016年 Azuo. All rights reserved.
7 | //
8 |
9 | #import
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 |
--------------------------------------------------------------------------------
/KVO演示.xcodeproj/xcuserdata/sheng.xcuserdatad/xcschemes/xcschememanagement.plist:
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1 |
2 |
3 |
4 |
5 | SchemeUserState
6 |
7 | KVO演示.xcscheme
8 |
9 | orderHint
10 | 0
11 |
12 |
13 |
14 |
15 |
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/KVO演示.xcodeproj/xcuserdata/cws.xcuserdatad/xcschemes/xcschememanagement.plist:
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1 |
2 |
3 |
4 |
5 | SchemeUserState
6 |
7 | KVO演示.xcscheme_^#shared#^_
8 |
9 | orderHint
10 | 0
11 |
12 |
13 |
14 |
15 |
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/KVO演示.xcodeproj/xcuserdata/_sheng.xcuserdatad/xcschemes/xcschememanagement.plist:
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1 |
2 |
3 |
4 |
5 | SchemeUserState
6 |
7 | KVO演示.xcscheme
8 |
9 | orderHint
10 | 0
11 |
12 |
13 | SuppressBuildableAutocreation
14 |
15 | 9F4359AD1CD0B8C1002B116F
16 |
17 | primary
18 |
19 |
20 |
21 |
22 |
23 |
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/KVO演示/Assets.xcassets/AppIcon.appiconset/Contents.json:
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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 | "idiom" : "ipad",
35 | "size" : "29x29",
36 | "scale" : "1x"
37 | },
38 | {
39 | "idiom" : "ipad",
40 | "size" : "29x29",
41 | "scale" : "2x"
42 | },
43 | {
44 | "idiom" : "ipad",
45 | "size" : "40x40",
46 | "scale" : "1x"
47 | },
48 | {
49 | "idiom" : "ipad",
50 | "size" : "40x40",
51 | "scale" : "2x"
52 | },
53 | {
54 | "idiom" : "ipad",
55 | "size" : "76x76",
56 | "scale" : "1x"
57 | },
58 | {
59 | "idiom" : "ipad",
60 | "size" : "76x76",
61 | "scale" : "2x"
62 | }
63 | ],
64 | "info" : {
65 | "version" : 1,
66 | "author" : "xcode"
67 | }
68 | }
--------------------------------------------------------------------------------
/KVO演示/Info.plist:
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1 |
2 |
3 |
4 |
5 | CFBundleDevelopmentRegion
6 | en
7 | CFBundleExecutable
8 | $(EXECUTABLE_NAME)
9 | CFBundleIdentifier
10 | $(PRODUCT_BUNDLE_IDENTIFIER)
11 | CFBundleInfoDictionaryVersion
12 | 6.0
13 | CFBundleName
14 | $(PRODUCT_NAME)
15 | CFBundlePackageType
16 | APPL
17 | CFBundleShortVersionString
18 | 1.0
19 | CFBundleSignature
20 | ????
21 | CFBundleVersion
22 | 1
23 | LSRequiresIPhoneOS
24 |
25 | UILaunchStoryboardName
26 | LaunchScreen
27 | UIMainStoryboardFile
28 | Main
29 | UIRequiredDeviceCapabilities
30 |
31 | armv7
32 |
33 | UISupportedInterfaceOrientations
34 |
35 | UIInterfaceOrientationPortrait
36 | UIInterfaceOrientationLandscapeLeft
37 | UIInterfaceOrientationLandscapeRight
38 |
39 | UISupportedInterfaceOrientations~ipad
40 |
41 | UIInterfaceOrientationPortrait
42 | UIInterfaceOrientationPortraitUpsideDown
43 | UIInterfaceOrientationLandscapeLeft
44 | UIInterfaceOrientationLandscapeRight
45 |
46 |
47 |
48 |
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/KVO演示/Base.lproj/LaunchScreen.storyboard:
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/KVO演示/AppDelegate.m:
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1 | //
2 | // AppDelegate.m
3 | // KVO演示
4 | //
5 | // Created by zuoA on 16/4/27.
6 | // Copyright © 2016年 Azuo. 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 |
--------------------------------------------------------------------------------
/KVO演示/ViewController.m:
--------------------------------------------------------------------------------
1 | //
2 | // ViewController.m
3 | // KVO演示
4 | //
5 | // Created by zuoA on 16/4/27.
6 | // Copyright © 2016年 Azuo. All rights reserved.
7 | //
8 |
9 | #import "ViewController.h"
10 | #import "MyKVOModel.h"
11 |
12 | @interface ViewController ()
13 |
14 | @property (nonatomic, strong) MyKVOModel *myObject;
15 |
16 | @end
17 |
18 | @implementation ViewController
19 |
20 |
21 | - (void)viewDidLoad {
22 | [super viewDidLoad];
23 |
24 | // 初始化待观察类对象
25 | self.myObject = [[MyKVOModel alloc]init];
26 |
27 | // 1.注册对象myKVO为被观察者。
28 | // option中：
29 | // NSKeyValueObservingOptionOld 以字典的形式提供 “初始对象数据”;
30 | // NSKeyValueObservingOptionNew 以字典的形式提供 “更新后新的数据”;
31 | [self.myObject addObserver:self
32 | forKeyPath:@"num"
33 | options:NSKeyValueObservingOptionOld|NSKeyValueObservingOptionNew
34 | context:nil];
35 |
36 | }
37 |
38 | #pragma mark - KVO
39 | /**
40 | 2.只要object的keyPath属性发生变化，就会调用此回调方法，进行相应的处理：UI更
41 |
42 | @param keyPath 属性名称
43 | @param object 被观察的对象
44 | @param change 变化前后的值都存储在 change 字典中
45 | @param context 注册观察者时，context 传过来的值
46 | */
47 | -(void)observeValueForKeyPath:(NSString *)keyPath
48 | ofObject:(id)object
49 | change:(NSDictionary *)change
50 | context:(void *)context {
51 | if([keyPath isEqualToString:@"num"] && object == self.myObject) {
52 | // 响应变化处理：UI更新（label文本改变）
53 | self.label.text = [NSString stringWithFormat:@"当前的num值为：%@",
54 | [change valueForKey:@"new"]];
55 |
56 | //上文注册时，枚举为2个，因此可以提取change字典中的新、旧值的这两个方法
57 | NSLog(@"\noldnum:%@ newnum:%@",
58 | [change valueForKey:@"old"],
59 | [change valueForKey:@"new"]);
60 | }
61 | }
62 |
63 | #pragma mark - Event Click
64 |
65 | /**
66 | 按钮事件
67 |
68 | @param sender button
69 | */
70 | - (IBAction)changeNum:(UIButton *)sender {
71 | //按一次，使num的值+1
72 | self.myObject.num = self.myObject.num + 1;
73 | }
74 |
75 | /**
76 | 3.移除KVO
77 | */
78 | - (void)dealloc {
79 | [self removeObserver:self
80 | forKeyPath:@"num"
81 | context:nil];
82 | }
83 |
84 | @end
85 |
86 |
--------------------------------------------------------------------------------
/KVO演示.xcodeproj/xcuserdata/_sheng.xcuserdatad/xcschemes/KVO演示.xcscheme:
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/KVO演示/Base.lproj/Main.storyboard:
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/KVO演示.xcodeproj/project.pbxproj:
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1 | // !$*UTF8*$!
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