ios多手势事件

开发ios应用时我们经常用到多手势来处理事情，如给scrollView增加点击事件，scrollView不能响应view的touch事件,但有时候却要用到多手势事件，那么我们可以给这个scrollView增加自己的手指事件。给imageView增加点击、放大、旋转等都可以通过多手势来完成。
下面就介绍下各种的手势的使用方法，及注意事项。
- (void)viewDidLoad

{
[super viewDidLoad];
//为了能响应多手势事件，imageView的userInteractionEnabled属性要设为YES.
self.imageView.userInteractionEnabled=YES;

//1、手指点击事件
//单指单击
UITapGestureRecognizer *singleFingerOne = [[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(fingerIncident:)];
//手指数
singleFingerOne.numberOfTouchesRequired = 1;
//点击次数
singleFingerOne.numberOfTapsRequired = 1;
//设置代理方法
singleFingerOne.delegate= self;
//增加事件者响应者，
[self.imageView addGestureRecognizer:singleFingerOne];

//单指双击
UITapGestureRecognizer *singleFingerTwo = [[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(fingerIncident:)];
singleFingerTwo.numberOfTouchesRequired = 1;
singleFingerTwo.numberOfTapsRequired = 2;
singleFingerTwo.delegate= self;
[self.imageView addGestureRecognizer:singleFingerTwo];

//双指单击
UITapGestureRecognizer *doubleFingerOne = [[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(fingerIncident:)];
doubleFingerOne.numberOfTouchesRequired = 2;
doubleFingerOne.numberOfTapsRequired = 1;
doubleFingerOne.delegate= self;
[self.imageView addGestureRecognizer:doubleFingerOne];

//双指双击
UITapGestureRecognizer *doubleFingerTwo = [[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(fingerIncident:)];
doubleFingerTwo.numberOfTouchesRequired = 2;
doubleFingerTwo.numberOfTapsRequired = 2;
doubleFingerTwo.delegate= self;
[self.imageView addGestureRecognizer:doubleFingerTwo];

//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];
//同理双指也是如此
[doubleFingerOne requireGestureRecognizerToFail:doubleFingerTwo];

//2、手势为捏的姿势:按住option按钮配合鼠标来做这个动作在虚拟器上
UIPinchGestureRecognizer *pinchGesture=[[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(handlePinchGesture:)];
[self.imageView addGestureRecognizer:pinchGesture];//imageView添加手势识别
[pinchGesture release];

//3、旋转手势:按住option按钮配合鼠标来做这个动作在虚拟器上
UIRotationGestureRecognizer *rotateGesture=[[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(handleRotateGesture:)];
[self.imageView addGestureRecognizer:rotateGesture];
[rotateGesture release];

//4、拖手势
UIPanGestureRecognizer *panGesture=[[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(handlePanGesture:)];
[self.imageView addGestureRecognizer:panGesture];
[panGesture release];

//当实现上面拖手势（UIPanGestureRecognizer）后将不能响应下面的左右划（UISwipeGestureRecognizer）事件，事件会被拖手势栏截，所以左右划和拖手势只能选其一
//右划
UISwipeGestureRecognizer *swipeGesture=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeGesture:)];
[self.imageView addGestureRecognizer:swipeGesture];
[swipeGesture release];
//左划
UISwipeGestureRecognizer *swipeLeftGesture=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeGesture:)];
swipeGesture.direction=UISwipeGestureRecognizerDirectionLeft;//不设置黑夜是右
[self.imageView addGestureRecognizer:swipeLeftGesture];
[swipeLeftGesture release];

UILongPressGestureRecognizer *longpressGesutre=[[UILongPressGestureRecognizer alloc]initWithTarget:self
action:@selector(handleLongpressGesture:)];
//长按时间为1秒
longpressGesutre.minimumPressDuration=0.5;
//允许15秒中运动
longpressGesutre.allowableMovement=3;
//所需触摸1次
longpressGesutre.numberOfTouchesRequired=1;
[self.imageView addGestureRecognizer:longpressGesutre];
[longpressGesutre release];
}

//手指点击事件
- (void)fingerIncident:(UITapGestureRecognizer *)sender
{
if (sender.numberOfTouchesRequired==1) {
//单指点击事件
if(sender.numberOfTapsRequired == 1) {
//单指单击
NSLog(@"单指单击");
[sender.view.layer removeAllAnimations];
}
else if(sender.numberOfTapsRequired ==2 ){
//单指双击
NSLog(@"单指双击");
}
}
else if (sender.numberOfTouchesRequired==2) {
//双指点击事件
if(sender.numberOfTapsRequired == 1) {
//双指单击
NSLog(@"双指单击");
}
else if(sender.numberOfTapsRequired ==2 ){
//双指双击
NSLog(@"双指双击");
}
}
}

//手指左右滑动事件
-(void)handleSwipeGesture:(UISwipeGestureRecognizer *)sender{
if (sender.direction==UISwipeGestureRecognizerDirectionLeft) {
NSLog(@"左滑");
}
else{
NSLog(@"右滑");
}
}

//手指捏事件
-(void)handlePinchGesture:(UIPinchGestureRecognizer *)sender{
NSLog(@"捏");

if([sender state] == UIGestureRecognizerStateEnded) {
lastScale = 1.0;
return;
}

CGFloat scale = 1.0 - (lastScale - [(UIPinchGestureRecognizer*)sender scale]);

CGAffineTransform newTransform = CGAffineTransformScale(sender.view.transform, scale, scale);

[sender.view setTransform:newTransform];
lastScale = [sender scale];
}

//手指旋转事件
-(void)handleRotateGesture:(UIRotationGestureRecognizer *)sender{
NSLog(@"旋转");

NSLog(@"sender.scale=%f",sender.rotation);
NSLog(@"sender.velocity=%f",sender.velocity);

sender.view.transform=CGAffineTransformRotate(sender.view.transform, sender.rotation);
sender.rotation=0;
}

//手指拖事件
-(void)handlePanGesture:(UIPanGestureRecognizer *)sender{
NSLog(@"拖");
NSLog(@"sender＝%@",sender);
CGPoint translation=[(UIPanGestureRecognizer*)sender translationInView:self.view];

//开始
if (sender.state==UIGestureRecognizerStateBegan) {
x=sender.view.center.x;
y=sender.view.center.y;
}
//进行中
if (sender.state==UIGestureRecognizerStateChanged) {
sender.view.center=CGPointMake(x+translation.x, y+translation.y);
}
//结束
if (sender.state==UIGestureRecognizerStateEnded) {
sender.view.center=CGPointMake(x+translation.x, y+translation.y);
}
}

//手指长按事件
-(void)handleLongpressGesture:(UILongPressGestureRecognizer *)sender{
NSLog(@"长按");
if (sender.state==UIGestureRecognizerStateBegan) {
CABasicAnimation* rotationAnimation_ = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
//角度转弧度
rotationAnimation_.fromValue = [NSNumber numberWithFloat:(-0.02)];
rotationAnimation_.toValue = [NSNumber numberWithFloat:(0.02)];
//动画时间
rotationAnimation_.duration = 0.1f;
//动画次数
rotationAnimation_.repeatCount=FLT_MAX;
//回退动画
rotationAnimation_.autoreverses = YES;
//动画开始结束的快慢，设置为加速
rotationAnimation_.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
[[sender.view layer] addAnimation:rotationAnimation_ forKey:@"revItUpAnimation"];
}
}