ios - UIButton - 当调用触摸重复时防止调用触摸事件

Question

我有一个按钮，当用户点击它时，它以一种方式运行，当用户双击它时，它以另一种方式运行。如果用户双击按钮，我不希望发生单击行为。

如果双击被识别，我如何阻止调用触地事件？

Answer 1

您可以使用目标操作；对于 UIControlEvents，您可以使用“UIControlEventTouchDown”和“UIControlEventTouchDownRepeat”，如下所示:

UIButton * button = [UIButton buttonWithType:UIButtonTypeContactAdd];
button.frame = CGRectMake(150, 200, 50, 50);
[button addTarget:self action:@selector(buttonSingleTap:) forControlEvents:UIControlEventTouchDown];
[button addTarget:self action:@selector(buttonMutipleTap:) forControlEvents:UIControlEventTouchDownRepeat];
[self.view addSubview:button];

- (void)buttonSingleTap:(UIButton *)btn{
    [self performSelector:@selector(buttonAction:) withObject:btn afterDelay:0.5];
}

- (void)buttonAction:(UIButton *)sender{
    NSLog(@"single tap");
}

- (void)buttonMutipleTap:(UIButton *)btn{
    [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(buttonAction:) object:btn];
    NSLog(@"mutiple tap!");
}

但是会有0.5秒的延迟!