UIGestureRecognizer 手势操作 iOS

iPhone 中处理手机触摸屏的手势操作在3.2版本以前是UIResponder，它是需要程序分辨不同的手势操作来做出相应的反应！而在3.2以后苹果公司提供了一种渐变快捷的方法：UIGestureResponder的方法；以下介绍以下UIGestureResponder方法的使用；

  手势：

          如果用户需要定义手势，需要 touchBegain   touchMove   touchEnd     touchCancle 这四个方法，系统重写这四个类方法，为我们提供了用户常见的手势， UIGestureRecognizer 系统所有手势的父类，  在这父类中为所有手势定义了， 初始化方法。

       - (instancetype)initWithTarget:(id)target action:(SEL)action;

 手势的状态，state

   当前手势响应的视图 view

   以及几个重要的方法

// 当前手势屏蔽另外的手势

- (void)requireGestureRecognizerToFail:(UIGestureRecognizer *)otherGestureRecognizer;

//  当前手势在view上的位置

- (CGPoint)locationInView:(UIView*)view;  

//  当前手势有多少个手指

- (NSUInteger)numberOfTouches;

系统定义了一些常见的手势

  UITapGestureRecognizer： 轻拍（单击或者双击）

  UIPinchGestureRecognizer： 捏合

 UIPanGestureRecognizer：拖动

 UILongPressGestureRecognizer：  长按

 UISwipeGestureRecognizer：  轻扫

 UIRotationGestureRecognizer： 旋转

 */

少废话，直接上代码

首先我们以对一个view视图来操作来实现手势的功能

定义一个视图

targetview=[[UIView alloc]initWithFrame:CGRectMake(100, 200, 200, 200)];

targetview.backgroundColor=[UIColor cyanColor];

[self.window addSubview:targetview];

//   实现单击响应事件

    //1.创建手势实例，并且连接tapAction来响应手势

    UITapGestureRecognizer *singletapGestureRecognizer=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapAction:)];

//  给手势添加辨认

   [targetview addGestureRecognizer:singletapGestureRecognizer];

//  实现双击响应点击事件  doubleTAP 来响应手势

UITapGestureRecognizer *doubleTap=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(doubleTAP:)];

    设置点击的次数实现双击

    doubleTap.numberOfTapsRequired=2;

//    单击入要执行，必须双击失效，实现互斥

[singletapGestureRecognizer requireGestureRecognizerToFail:doubleTap];

//给视图添加手势

 [targetview addGestureRecognizer:doubleTap];

添加捏合手势 pinchTap：   

UIPinchGestureRecognizer *pinch=[[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinchTap:)];

  [targetview addGestureRecognizer:pinch];

//手势拖动

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

     // 添加手势

[targetview addGestureRecognizer:pan];

 //长按添加事件

    UILongPresszGestureRecognizer *longP=

[[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longAction:)];

 // 给视图添加事件

  [targetview addGestureRecognizer:longP];

//    轻扫添加事件                                                                                                                                    

 UISwipeGestureRecognizer *swipe=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipe:)];

    swipe.direction=UISwipeGestureRecognizerDirectionLeft;

  //给视图添加拖动手势   

 [targetview addGestureRecognizer:swipe];

  //添加选装手势                                    

UIRotationGestureRecognizer *ratation=[[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotaA:)];

//给视图添加旋转的手势

    [targetview addGestureRecognizer:ratation];

  self.window.backgroundColor = [UIColor whiteColor];

 [self.window makeKeyAndVisible];

    return YES;

}

//旋转

-(void)rotaA:(UIRotationGestureRecognizer *)sender

{

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

}

//轻扫

-(void)swipe:(UISwipeGestureRecognizer *)sender

{

    switch (sender.direction) {

        case UISwipeGestureRecognizerDirectionLeft:

            NSLog(@" 左");

            break;

        case UISwipeGestureRecognizerDirectionRight:

            break;

        case UISwipeGestureRecognizerDirectionDown:

            break;

        case UISwipeGestureRecognizerDirectionUp:

            break;

        default:

            break;

    }

}

-(void)tapAction:(UITapGestureRecognizer *)sender

{

    NSLog(@"单击");

}

-(void)doubleTAP:(UITapGestureRecognizer *)sender

{

    NSLog(@"双击");

}

-(void)pinchTap:(UIPinchGestureRecognizer *)sender

{

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

}

-(void)pan:(UIPanGestureRecognizer *)sender

{

    CGPoint point=[sender translationInView:self.window];

    sender.view.center=CGPointMake(sender.view.center.x+point.x, sender.view.center.y+point.y);

    [sender setTranslation:CGPointZero inView:self.window ];

}

-(void)longAction:(UILongPressGestureRecognizer *)sender

{

//    根据手势的状态

 if (sender.state==UIGestureRecognizerStateEnded) {

//       

 UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"长按" message:@"长按" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"button1",@"button2", nil];

//      

  [alert dismissWithClickedButtonIndex:0 animated:YES];

//        UITextField *text=[alert textFieldAtIndex:3];

//        [alert show];

//        UIAlertView *alertview=[[UIAlertView alloc]initWithTitle:@"登陆" message:nil delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"登陆", nil];

//        [alertview setAlertViewStyle:UIAlertViewStyleLoginAndPasswordInput];

//        UITextField *text=[alertview textFieldAtIndex:0];

//         UITextField *text1=[alertview textFieldAtIndex:1];

//        [alertview show];

        UIActionSheet *actionSheet=[[UIActionSheet alloc]initWithTitle:@"title" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"1" otherButtonTitles:@"2",@"3", nil];

        [actionSheet showInView:self.window];     

    }

}

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex

{

    NSLog(@"buttonindex=%ld",buttonIndex);

    switch (buttonIndex) {

        case 0:

            NSLog(@"button");

            break;

        case 1:

            NSLog(@"button2");

            break;

        case 2:

            NSLog(@"取消");

            break;

        case 3:

            NSLog(@"hhh"); 

            break;

        default:

            break;

    }

}

//actionsheet

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex

{

    switch (buttonIndex) {

        case 0:

            NSLog(@"button");

            break;

        case 1:

            NSLog(@"button2");

            break;

        case 2:

            NSLog(@"取消");

            break;

        case 3:

            NSLog(@"hhh");          

            break;   

        default:

            break;

    }

}

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

    //手势取消！

}