UIday05_zy02: 代理设计模式

最新推荐文章于 2024-04-23 20:50:51 发布

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最新推荐文章于 2024-04-23 20:50:51 发布

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分类专栏： OC学习笔记 IOS_UI学习笔记文章标签： UI IOS objective-c OC

本文链接：https://blog.youkuaiyun.com/tiebanshao/article/details/48110575

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本文详细阐述了代理设计模式在iOS应用中的具体实现，通过实例展示了如何使用代理模式来实现对象间的松耦合，并通过RootViewController、RootView和MyButtonView之间的交互，深入探讨了代理模式的应用场景和优势。

代理设计模式

AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    
    RootViewController * rootVC = [[RootViewController alloc]init];
    self.window.rootViewController = rootVC;    

    return YES;
}

RootViewController.m

#import "RootViewController.h"

@interface RootViewController ()<MyButtonViewDelegate>

@property(nonatomic,strong)RootView *rv;

@end

@implementation RootViewController

-(void)loadView{
    self.rv = [[RootView alloc]initWithFrame:[UIScreen mainScreen].bounds];
    self.view = _rv;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    //设置代理
    self.rv.myButton.delegate = self;
    
}

//实现代理方法
-(void)myButtonAction:(MyButtonView *)sender{
    NSLog(@"delegate");
}

@end

RootView.h

#import <UIKit/UIKit.h>
#import "MyButtonView.h"

@interface RootView : UIView

@property(nonatomic,strong)MyButtonView * myButton;

@end

RootView.m

#import "RootView.h"

@implementation RootView

- (instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self p_setupViews];
    }
    return self;
}
-(void)p_setupViews{
    self.backgroundColor = [UIColor yellowColor];
    
    self.myButton = [[MyButtonView alloc]initWithFrame:CGRectMake(50, 50, 100, 100)];
    self.myButton.backgroundColor = [UIColor blueColor];
    [self addSubview:_myButton];
}

@end

MyButtonView.h

#import <UIKit/UIKit.h>

@class MyButtonView;

// 添加一个协议
@protocol MyButtonViewDelegate <NSObject>
//  声明一个协议的方法
-(void)myButtonAction:(MyButtonView *)sender;

@end

@interface MyButtonView : UIView

// 根据遵循协议添加一个代理   (注意代理属性定义要用assign)
@property(nonatomic,assign)id<MyButtonViewDelegate> delegate;

@property(nonatomic,strong)MyButtonView * button;

@end

MyButtonView.m

#import "MyButtonView.h"

@implementation MyButtonView

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    // 让代理去执行代理方法
    [_delegate myButtonAction:self];
}

@end