Question

嗨，我正在尝试为'UIButton'添加手势识别器。当我这样做时：

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTap:)];
[self.LeftBottomSpaceBtn addGestureRecognizer:singleTap];
[singleTap requireGestureRecognizerToFail:doubleTap];
[singleTap release];

它工作正常，但当我尝试将此手势添加到多个按钮时，它无法正常工作：

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTap:)];
[self.LeftBottomSpaceBtn addGestureRecognizer:singleTap];
[self.LeftUpSpaceBtn addGestureRecognizer:singleTap];
[self.RightBUpSpaceBtn addGestureRecognizer:singleTap];
[self.LeftReturnBtn addGestureRecognizer:singleTap];
[self.RightReturnBtn addGestureRecognizer:singleTap];
[self.DeleteBtn addGestureRecognizer:singleTap];
[self.CapsBtn addGestureRecognizer:singleTap];
[singleTap requireGestureRecognizerToFail:doubleTap];
[singleTap release];

那么如何以与添加'longPress'和'doubleTap'相同的方式将相同的手势添加到多个按钮？

Answer 1

我建议如下：

NSMutableSet *buttons = [[NSMutableSet alloc] init];

[buttons addObject: self.LeftBottomSpaceBtn];
[buttons addObject: self.LeftUpSpaceBtn];
[buttons addObject: self.RightBUpSpaceBtn];
[buttons addObject: self.LeftReturnBtn];
[buttons addObject: self.RightReturnBtn];
[buttons addObject: self.DeleteBtn];
[buttons addObject: self.CapsBtn];

for(UIButton *button in buttons)
{
    UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTap:)];
    [button addGestureRecognizer:singleTap];
    [singleTap requireGestureRecognizerToFail:doubleTap];
    [singleTap release];
}

如果将该集保存为变量，您也可以为所有按钮执行其他操作，例如全部释放它们并更改所有backgroundColors，而无需单独调用它们。

您可能还需要为每个按钮制作单独的双重识别。

Answer 2

您可以单独向一个视图添加一个手势识别器。如果将其添加到多个视图中，则最后添加的视图将与识别器一起添加。

创建手势识别器的不同实例并将其添加到各个视图中。

如何将手势识别器添加到多个按钮？

2 个答案: