视图的单击，双击，捏合，扫动，旋转，长按等。

-(void)loadView
{
[super loadView];
self.view = [[[UIView alloc] initWithFrame:[UIScreen mainScreen].bounds] autorelease];
self.view.backgroundColor = [UIColor lightGrayColor];

UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(60, 184, 200, 200)];
imageView.image = [UIImage imageNamed:@"1.png"];
//打开图片的交互(不打开不能手势操作)  ps:很重要的细节
imageView.userInteractionEnabled = YES;
imageView.multipleTouchEnabled = YES;
imageView.tag = 100;
[self.view addSubview:imageView];
[imageView release];

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc]
initWithTarget:self
action:@selector(handleTapAction:)];

// 点击，双击
singleTap.numberOfTapsRequired = 1;
[imageView addGestureRecognizer:singleTap];

UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc]
initWithTarget:self
action:@selector(handleTapAction:)];
doubleTap.numberOfTapsRequired = 2;
[imageView addGestureRecognizer:doubleTap];

[singleTap requireGestureRecognizerToFail:doubleTap];

UITapGestureRecognizer *threeTap = [[UITapGestureRecognizer alloc]
initWithTarget:self
action:@selector(handleTapAction:)];
threeTap.numberOfTapsRequired = 3;
[imageView addGestureRecognizer:threeTap];

[doubleTap requireGestureRecognizerToFail:threeTap];

[singleTap release];
[doubleTap release];
[threeTap release];

// 捏合
UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinch:)];
[imageView addGestureRecognizer:pinch];
[pinch release];

// 旋转
UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(handleRotationAction:)];
[imageView addGestureRecognizer:rotation];
[rotation release];

// 横扫
UISwipeGestureRecognizer *swipeR = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeAction:)];
swipeR.numberOfTouchesRequired = 1;
swipeR.direction = UISwipeGestureRecognizerDirectionRight;
[imageView addGestureRecognizer:swipeR];
[swipeR release];

UISwipeGestureRecognizer *swipeL = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeAction:)];
swipeL.numberOfTouchesRequired = 1;
swipeL.direction = UISwipeGestureRecognizerDirectionLeft;
[imageView addGestureRecognizer:swipeL];
[swipeL release];

// 长按
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPressAction:)];
[imageView addGestureRecognizer:longPress];
[longPress release];

// 拖动
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePanAction:)];

[imageView addGestureRecognizer:pan];
[pan release];
}

-(void)handleTapAction:(UITapGestureRecognizer *)sender
{
if (sender.numberOfTapsRequired == 1)
{
NSLog(@"这是单击");
// insert code here...
}
if (sender.numberOfTapsRequired == 2)
{
NSLog(@"这是双击");
// insert code here...
}
if (sender.numberOfTapsRequired == 3)
{
NSLog(@"这是三击");
// insert code here...
}
if (sender.numberOfTapsRequired == 4)
{
NSLog(@"这是四击");
// insert code here...
}

}

-(void)handlePinch:(UIPinchGestureRecognizer *)sender
{
UIImageView *imageV = (UIImageView *)[self.view viewWithTag:100];
CGRect rect = imageV.frame;

rect.size.width = sender.scale*imageV.image.size.width;
rect.size.height = sender.scale*imageV.image.size.height;
imageV.frame = rect;
imageV.center = self.view.center;
//    sender.scale
}

-(void)handleRotationAction:(UIRotationGestureRecognizer *)sender
{
UIImageView *imageV = (UIImageView *)[self.view viewWithTag:100];
imageV.transform = CGAffineTransformRotate(imageV.transform, sender.rotation);
sender.rotation = 0;
//    if (sender.state == UIGestureRecognizerStateEnded)
//    {
//        sender.rotation = 0;
//        return;
//    }
// imageV.transform 参考的那个点(当前点) sender.rotation 旋转一定的角度
// 第一个参数是当前倾斜度，第二个参数是需要转动得倾斜度
//CGAffineTransform transform = CGAffineTransformRotate(imageV.transform, sender.rotation);

//imageV.transform = transform;
}

-(void)handleSwipeAction:(UISwipeGestureRecognizer *)sender
{
NSLog(@"改变颜色了");
if (sender.direction ==  UISwipeGestureRecognizerDirectionRight )
{
self.view.backgroundColor = [UIColor blackColor];
}
if (sender.direction == UISwipeGestureRecognizerDirectionLeft)
{
self.view.backgroundColor = [UIColor grayColor];
}
}

-(void)handleLongPressAction:(UILongPressGestureRecognizer *)sender
{
for (id type in [self.view subviews])
{
if ([type isKindOfClass:[UIActionSheet class]])
{
return;
}
}
UIActionSheet *actionsheet = [[UIActionSheet alloc] initWithTitle:@"提示"
delegate:nil
cancelButtonTitle:@"取消"
destructiveButtonTitle:nil
otherButtonTitles:@"下载到本地", nil];
[actionsheet showInView:self.view];
[actionsheet release];

}

-(void)handlePanAction:(UIPanGestureRecognizer *)sender
{
UIImageView *imageV = (UIImageView *)[self.view viewWithTag:100];

/*
CGPoint startPoint;
if (sender.state == UIGestureRecognizerStateBegan)
{
startPoint = [sender locationInView:imageV];
}
CGPoint currentPoint;
if (sender.state == UIGestureRecognizerStateChanged)
{
currentPoint = [sender locationInView:imageV];
}
float diaX = currentPoint.x - startPoint.x;
float diaY = currentPoint.y - startPoint.y;
CGPoint p =imageV.center;
p.x + = diaX;
p.y + = diaY;

imageV.center = p;
*/
// 老师的方法
/*
UIImageView * myView = (UIImageView *)[self.view viewWithTag:1000];
// 获得相对移动量
CGPoint p = [sender translationInView:myView];
// 改变中心点
myView.center = CGPointMake(myView.center.x + p.x, myView.center.y + p.y);
// 重置坐标零点
[sender setTranslation:CGPointZero inView:myView];
*/

//CGPoint stratPoint = imageV.frame.origin;
CGPoint point = [sender translationInView:imageV];

CGPoint p =
9f6b
imageV.center;
p.x += point.x;
p.y += point.y ;
imageV.center = p;

[sender setTranslation:CGPointZero inView:imageV];
//imageV.frame = CGRectMake(p.x, p.y, imageV.frame.size.width, imageV.frame.size.height);

}