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！

}