自己做了一个九宫格，里面的图标都是由多张图片重叠构成，然后包装成一个button来使用；
遇到的问题是如何给这个“button”增加点击事件？
解决思路1：网友提示在该“button”上增加一个真正的透明button，这样就可以顺利执行点击事件了；但是本人尝试发现，如果我调整了button的透明度后，点击是没有效果的！可能是我操作错误，待再次验证。
解决思路2：为UIImageView增加手势
[ImageView addGestureRecognizer:我们自己的手势recognizer];
如何创建一个手势？看看UITapGestureRecognizer 的用法吧
//单指单击
UITapGestureRecognizer *singleFingerOne = [[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(handleSingleFingerEvent:)];
singleFingerOne.numberOfTouchesRequired = 1; //手指数
singleFingerOne.numberOfTapsRequired = 1; //tap次数
singleFingerOne.delegate= self;
//单指双击
UITapGestureRecognizer *singleFingerTwo = [[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(handleSingleFingerEvent:)];
singleFingerTwo.numberOfTouchesRequired = 1;
singleFingerTwo.numberOfTapsRequired = 2;
singleFingerTwo.delegate= self;
//双指单击
UITapGestureRecognizer *doubleFingerOne = [[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(handleDoubleFingerEvent:)];
doubleFingerOne.numberOfTouchesRequired = 2;
doubleFingerOne.numberOfTapsRequired = 1;
doubleFingerOne.delegate= self;
UITapGestureRecognizer *doubleFingerTwo = [[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(handleDoubleFingerEvent:)];
doubleFingerTwo.numberOfTouchesRequired = 2;
doubleFingerTwo.numberOfTapsRequired = 2;
doubleFingerTwo.delegate= self;
//如果不加下面的话，当单指双击时，会先调用单指单击中的处理，再调用单指双击中的处理
[singleFingerOne requireGestureRecognizerToFail:singleFingerTwo];
//同理双指亦是如此
[doubleFingerOne requireGestureRecognizerToFail:doubleFingerTwo];
[self.view addGestureRecognizer:singleFingerOne];
[self.view addGestureRecognizer:singleFingerTwo];
[self.view addGestureRecognizer:doubleFingerOne];
[self.view addGestureRecognizer:doubleFingerTwo];
[singleFingerOne release];
[singleFingerTwo release];
[doubleFingerOne release];
[doubleFingerTwo release];
处理事件的方法，代码：
//处理单指事件
- (void)handleSingleFingerEvent:(UITapGestureRecognizer *)sender
{
if(sender.numberOfTapsRequired == 1) {
//单指单击
NSLog(@"单指单击");
}elseif(sender.numberOfTapsRequired == 2){
//单指双击
NSLog(@"单指双击");
}
}
//处理双指事件
- (void)handleDoubleFingerEvent:(UITapGestureRecognizer *)sender
{
if(sender.numberOfTapsRequired == 1) {
//双指单击
NSLog(@"双指单击");
}elseif(sender.numberOfTapsRequired == 2){
//双指双击
NSLog(@"双指双击");
}
}