如何为UIButton添加操作

我是iPhone技术的新手。 请任何人告诉我如何为UIButton添加操作。

UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect]; btn.frame = CGRectMake(0, 0, 100, 25); btn.backgroundColor = [UIColor clearColor]; [btn setTitle:@"Play" forState:UIControlStateNormal]; [btn addTarget:self action:(buttonClick:) forControlEvents:UIControlEventTouchUpInside]; btn.center = self.center; [self addSubview:btn]; 

Answer 1

您使用@selector（）指定select器。 所以， 动作参数看起来像，

 action:@selector(buttonClick:) 

Answer 2

用这个

  UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button addTarget:self action:@selector(aMethod:)forControlEvents:UIControlEventTouchDown]; [button setTitle:@"Show View" forState:UIControlStateNormal]; button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0); [view addSubview:button]; 

Answer 3

 action:@selector(buttonClick:) 

Answer 4

像这样使用

  UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect]; btn.frame = CGRectMake(0, 0, 100, 25); btn.backgroundColor = [UIColor clearColor]; [btn setTitle:@"Play" forState:UIControlStateNormal]; [btn addTarget:self action:@selector(btnTapped:) forControlEvents:UIControlEventTouchUpInside]; btn.center = self.center; [self addSubview:btn]; 

并添加你的select器方法

 -(IBAction)btnTapped:(id)sender{ } 

Answer 5

SWIFT代码：

 button.addTarget(self, action:"action_button", forControlEvents:.TouchUpInside) ... func action_button() { // implement me }