UIGestureRecognizer 手势操作 iOS

来源：互联网发布：得力指纹考勤软件编辑：程序博客网时间：2024/05/16 03:26

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！
}

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