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我正在尝试将以下代码精简为一个方法。目前，八种相同的方法用于处理对八个UIButton实例的点击。理想情况下，我只想将UIButton作为参数传递给，@selector这样我就可以避免需要八个相同的方法。我正在努力将参数传递给选择器的语法。如果可能的话，我想要一个handleTap: onButton:方法。目前，在按钮 1 到 8 上，有八种方法（handleTap1通过）可以进行相同的操作。handleTap8

UITapGestureRecognizer *tap1 = [[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(handleTap1:)];
UITapGestureRecognizer *tap2 = [[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(handleTap2:)];
UITapGestureRecognizer *tap3 = [[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(handleTap3:)];
UITapGestureRecognizer *tap4 = [[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(handleTap4:)];
UITapGestureRecognizer *tap5 = [[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(handleTap5:)];
UITapGestureRecognizer *tap6 = [[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(handleTap6:)];
UITapGestureRecognizer *tap7 = [[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(handleTap7:)];
UITapGestureRecognizer *tap8 = [[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(handleTap8:)];
[let1Button addGestureRecognizer: tap1];
[let2Button addGestureRecognizer: tap2];
[let3Button addGestureRecognizer: tap3];
[let4Button addGestureRecognizer: tap4];
[let5Button addGestureRecognizer: tap5];
[let6Button addGestureRecognizer: tap6];
[let7Button addGestureRecognizer: tap7];
[let8Button addGestureRecognizer: tap8];

这是其中一种方法的示例，显然我想let1Button用传入的参数替换来表示任何按钮。

- (void) handleTap1: (UITapGestureRecognizer *) recognizer
{
    [_box setText: [_box.text stringByAppendingString: [let1Button titleForState: UIControlStateNormal]]];
    [let1Button setUserInteractionEnabled:NO];
    [let1Button setTitleColor: [UIColor blackColor] forState: UIControlStateNormal];

}
4

3 回答 3

4

UIView（UIButton是一个子类UIView）有一个属性view。这是手势识别器附加到的视图

UITapGestureRecognizer *tap1 = [[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(handleTap:)];
[let1Button addGestureRecognizer: tap1];

- (void) handleTap: (UITapGestureRecognizer *) recognizer
{
    UIButton *button = (UIButton *)recognizer.view;
    [_box setText: [_box.text stringByAppendingString: [UIButton titleForState: UIControlStateNormal]]];
    [UIButton  setUserInteractionEnabled:NO];
    [UIButton setTitleColor: [UIColor blackColor] forState: UIControlStateNormal];

}
于 2012-11-24T16:00:21.697 回答
1

手势识别器有一个属性视图。您可以检查以找出在哪个按钮上执行了手势。

于 2012-11-24T15:52:37.327 回答
1

手势识别器作为参数传递给动作。在 action 方法中，您可以访问视图。

UIView myView = recognizer.view
if (myView isKindOfClass:[UIButton class])
{
   ...
}
于 2012-11-24T16:01:44.987 回答