iOS项目笔记<一>

1.手势操作，单击双击的区分

记得在作为delegate的view的头文件加上<UIGestureRecognizerDelegate>

tapRecognizer.maximumNumberOfTouches = 1;//设定次数

[A requireGestureRecognizerToFail：B]函数，它可以指定当A手势发生时，即便A已经滿足条件了，也不会立刻触发，会等到指定的手势B确定失败之后才触发。

第二种方式：

-(void)touchesEnded:(NSSet*)touches withEvent:(UIEvent*)event{

UITouch*touch=[touches anyObject];

if(touch.tapCount==1){

[UIViewanimateWithDuration:0.3animations:^{

UIImage*image=[UIImageimageNamed:@"view1.png"];

imageView.image=image;

[self.view addSubview:imageView];

}completion:nil];}

elseif(touch.tapCount==2){

[UIViewanimateWithDuration:0.3animations:^{

UIImage*image=[UIImageimageNamed:@"view2.png"];

imageView.image=image;

[self.view addSubview:imageView];

}completion:nil];}

}