Iphone 如何为UIButton添加操作

我不熟悉iPhone技术。请告诉我如何为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];

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您可以使用@selector（）指定选择器。动作参数看起来像

action:@selector(buttonClick:)

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];

Swift代码：

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

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];

并添加选择器方法

-(IBAction)btnTapped:(id)sender{

}

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不是关于这个问题，但你这里有内存泄漏。如果以后不调用释放按钮，则不要调用保留按钮。不需要retain，因为该按钮不是ivar并且是自动释放的。已删除内存泄漏。

-(IBAction)btnTapped:(id)sender{

}