iOS 各种手势用法

原文标题是，IOS UIScrollview UIImageView点击事件处理

原文出自：http://blog.sina.com.cn/s/blog_bd98ffe20101bz7z.html

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:selfaction:@selector(handlePinchGesture:)];

[self.imageViewaddGestureRecognizer: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:selfaction:@selector(handleRotateGesture:)];

[self.imageView addGestureRecognizer:rotateGesture];

[rotateGesture release];

//4、拖手势

UIPanGestureRecognizer *panGesture=[[UIPanGestureRecognizer alloc]initWithTarget:selfaction:@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:selfaction:@selector(handleSwipeGesture:)];

[self.imageView addGestureRecognizer:swipeGesture];

[swipeGesture release];

//左划

UISwipeGestureRecognizer *swipeLeftGesture=[[UISwipeGestureRecognizer alloc]initWithTarget:selfaction:@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*)sendertranslationInView: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_ = [CABasicAnimationanimationWithKeyPath:@"transform.rotation.z"];

//角度转弧度

rotationAnimation_.fromValue =[NSNumbernumberWithFloat:(-0.02)];

rotationAnimation_.toValue =[NSNumbernumberWithFloat:(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 =[CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionEaseInEaseOut];

[[sender.view layer]

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