IOS-TargetAction

Posted 2020-07-10

创建一个UIButton 并用Target - Action来监听它的点击事件

Target -- self控制器 

Action -- 具体动作，self控制器中的某个方法

forControlEvents:UIControlEventTouchUpInside -- 表示监听的事件

 1 - (void)btnclick:(id)sender
 2 {
 3     NSLog(@"点击%@" , [sender class]);
 4 }
 5 
 6 - (void)viewDidLoad {
 7     [super viewDidLoad];
 8     // Do any additional setup after loading the view, typically from a nib.
 9     
10     UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
11     btn.frame = CGRectMake(100, 100, 100, 100);
12     [btn setTitle:@"点击" forState:UIControlStateNormal];
13     
14     [btn addTarget:self action:@selector(btnclick:) forControlEvents:UIControlEventTouchUpInside];
15     
16     [self.view addSubview:btn];
17 }