mark

runtime在类别category中增加属性的简单方法；

UIView的tap事件快速获取；

UIButton的touchUpInside事件快速获取；

优点是方便快捷，缺点是需要注意block的使用；

内容简单实用，，，仅供初学者参考。。。

#import "UIView+DKView.h"

.h

//
//  UIView+DKView.h
//  DEMOKING
//
//  Created by 王亚振 on 2021/4/25.
//

#import <UIKit/UIKit.h>
typedef void (^DKTapBlock)(void);

@interface UIView (DKView)

/// 调用tapBlock简单的单击事件回调
@property (copy, nonatomic) DKTapBlock tapBlock;

@end

.m

//
//  UIView+DKView.m
//  DEMOKING
//
//  Created by 王亚振 on 2021/4/25.
//

#import "UIView+DKView.h"
#import <objc/runtime.h>

static char kDKTapBlock;

@implementation UIView (DKView)

/// runtime构建属性
/// @param tapBlock 点击回调
- (void)setTapBlock:(DKTapBlock)tapBlock {
    // OBJC_ASSOCIATION_COPY 的选取根据属性选择不同的类型
    objc_setAssociatedObject(self, &kDKTapBlock, tapBlock, OBJC_ASSOCIATION_COPY);
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapMethod:)];
    [self addGestureRecognizer:tap];
}
- (DKTapBlock)tapBlock {
    return objc_getAssociatedObject(self, &kDKTapBlock);
}
- (void)tapMethod:(UIGestureRecognizer *)tap {
    if (self.tapBlock) {
        self.tapBlock();
    }
}

@end

#import "UIButton+DKButton.h"

.h

//
//  UIButton+DKButton.h
//  DEMOKING
//
//  Created by 王亚振 on 2021/4/25.
//

#import <UIKit/UIKit.h>

typedef void (^DKTouchBlock)(void);

@interface UIButton (DKButton)

/// 调用tapBlock简单的单击事件回调
@property (copy, nonatomic) DKTouchBlock touchBlock;

@end

.m

//
//  UIButton+DKButton.m
//  DEMOKING
//
//  Created by 王亚振 on 2021/4/25.
//

#import "UIButton+DKButton.h"
#import <objc/runtime.h>

static char kDKTouchBlock;

@implementation UIButton (DKButton)

/// runtime构建属性
/// @param touchBlock 点击回调
- (void)setTouchBlock:(DKTouchBlock)touchBlock {
    objc_setAssociatedObject(self, &kDKTouchBlock, touchBlock, OBJC_ASSOCIATION_COPY);
    [self addTarget:self
             action:@selector(touchMethod)
   forControlEvents:UIControlEventTouchUpInside];
}
- (DKTouchBlock)touchBlock {
    return objc_getAssociatedObject(self, &kDKTouchBlock);
}
- (void)touchMethod {
    if (self.touchBlock) {
        self.touchBlock();
    }
}

@end

使用方法

    self.view.tapBlock = ^{
        NSLog(@"这里点击了view");
    };
    self.test2.touchBlock = ^{
        NSLog(@"这里点击了button");
    };

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