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uibutton用block实现点击事件

admin 11月 13, 2020 0

就走两步路，有必要开飞机去吗？有很多傻逼，想把UIButton的点击事件和创建放到一块，导入了RAC。导入一个类库，一个项目就用到了三五个地方，大材小用，且ipa瞬间增大，何必呢？

效果

使用

#import "UIControl+Ext.h"
@interface  ()
@end
@implementation 
- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
    [self.view  addSubview:btn];
    btn.frame = CGRectMake(0, 0, 200, 200);
    btn.center = self.view.center;
    btn.backgroundColor = [UIColor greenColor];
    
    [btn clickWithHandler:^{
        NSLog(@"点击了按钮");
    }];
}
@end

UIControl+Ext.h

#import <UIKit/UIKit.h>
typedef void(^HH_ClickBlock)();
@interface UIControl (Ext)
- (void)clickWithHandler:(HH_ClickBlock)block;
@end

UIControl+Ext.m

#import "UIControl+Ext.h"
#import <objc/runtime.h>
@implementation UIControl (Ext)
- (void)clickWithHandler:(HH_ClickBlock)block
{
    
    objc_setAssociatedObject(self, "hhclickBlock", block, OBJC_ASSOCIATION_COPY);
    [self addTarget:self action:@selector(handleAction:) forControlEvents:UIControlEventTouchUpInside];
}
- (void)handleAction:(id)sender
{
    HH_ClickBlock block =  objc_getAssociatedObject(self, "hhclickBlock");
    if (block) {
        block();
    }
}
@end

demo 下载