IOS的手势的实现代码

// 初始化一个UIimageView 
UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(100, 100, 300, 300)]; 
imageView.image = [UIImage imageNamed:@"12.jpg"];
// UIImageView的用户交互是默认关闭的，要想使他可以处理触摸事件，我们得手动打开它 
[imageView setUserInteractionEnabled:YES]; 
[self.window addSubview:imageView];

//初始化一个视图（响应者）来承载手势 
UIView *gestureView = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)]; 
//当前视图放置到屏幕中央 
gestureView.center = self.window.center; 
gestureView.backgroundColor = [UIColor yellowColor];
 [self.window addSubview:gestureView];

1、轻拍手势

//创建轻拍手势 
UITapGestureRecognizer *tapGR = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction:)];

设置触控对象，和轻拍的次数

//设置触控对象的个数（几个手指） 
[tapGR setNumberOfTouchesRequired:1]; 
//设置轻拍次数 
[tapGR setNumberOfTapsRequired:2];

//给创建好的视图添加手势
[gestureView addGestureRecognizer:tapGR];

//轻拍手势的回调方法
- (void)tapAction:(UITapGestureRecognizer*)sender{ 
//可以根据手势得到它当前所作用的视图 
UIImageView *imageView = (UIImageView*)sender.view; 
//得到textfield viewWithTag此方法的返回值为UIView类型，但是UITextField为UIView的子类，父类对象不能直接指向子类对象，所以需要强制转换
 UITextField *textField = (UITextField*)[self.window viewWithTag:1000];
// //回收键盘，取消第一响应者
[textField resignFirstResponder]; 
NSLog(@"我轻拍了gestureView");}

2、捏合手势

//创建捏合手势 UIPinchGestureRecognizer* pinchGR = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchAction:)]; 
pinchGR.delegate = self; // 可以在同一个视图上实现多个手势

//捏合手势的回调方法
- (void)pinchAction:(UIPinchGestureRecognizer*)sender{ 
    //通过捏合手势的到缩放比率 
    float scale = sender.scale; 
    //得到该手势所作用的视图 
    UIView *view = sender.view; 
    //2D仿射变换函数中的缩放函数来实现视图的放大缩小 
    //是在原有基础上来改变当前的视图 
    //函数的第一个参数：现有的视图的transform值 
    //第二个参数：x轴上的缩放比率 
    //第三个参数:y轴上的缩放比率 
    //是在视图最初的transform状态上改变，不管执行多少次，都是以该视图最    初的transform状态为基础来改变 
    view.transform = CGAffineTransformMakeScale(2, 2);
    //view.transform = CGAffineTransformScale(view.transform, scale, scale);
     //每次捏合动作完毕之后，让此捏合值复原，使得它每次都是从100%开始缩放 
    sender.scale = 1;
}

3、旋转手势

//旋转手势 
UIRotationGestureRecognizer* rotaGR = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotaAction:)]; 
rotaGR.delegate = self;

//旋转手势回调方法
- (void)rotaAction:(UIRotationGestureRecognizer*)sender{ 
    //通过手势的到旋转角度 
    float rota = sender.rotation; 
    //得到该手势作用的视图 
    UIView *view = sender.view; 
    //通过2D仿射变换函数中的旋转函数来使得当前视图旋转
    view.transform = CGAffineTransformRotate(view.transform, rota); 
    //复原
    // sender.rotation = 0; sender.rotation = 0;
}

4、平移手势

//平移手势 
UIPanGestureRecognizer *panGP = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panAction:)];

//平移手势的回调方法
- (void)panAction:(UIPanGestureRecognizer*)sender{ 
    //得到当前手势所在视图 
    UIView *view = sender.view; 
    //得到我们在视图上移动的偏移量 
    CGPoint currentPoint = [sender translationInView:view.superview]; 
    //通过2D仿射变换函数中与位移有关的函数实现视图位置变化 
    view.transform = CGAffineTransformTranslate(view.transform,currentPoint.x, currentPoint.y); 
    //复原 
    // 每次都是从00点开始 
    [sender setTranslation:CGPointZero inView:view.superview];
}

5、边缘轻扫手势

//边缘轻扫手势 
UIScreenEdgePanGestureRecognizer *edgePanGR = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(edgePanAction:)]; 
edgePanGR.edges = UIRectEdgeAll;

//边缘轻扫手势回调方法
- (void)edgePanAction:(UIScreenEdgePanGestureRecognizer*)sender{         
    NSLog(@"我成功的触发了屏幕边缘手势");
}

6、长按手势

// 长按手势 
UILongPressGestureRecognizer *longPressPR = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressAction:)]; 
longPressPR.minimumPressDuration = 1;

//长按手势的回调方法
- (void)longPressAction:(UILongPressGestureRecognizer *)sender{
    if (sender.state == UIGestureRecognizerStateEnded) { 
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"看你麻痹" message:@"不服你咬死我" delegate:self cancelButtonTitle:@"取消"   otherButtonTitles:@"确定", nil]; 
    [alertView show]; 
}}

7、轻扫手势

// 轻扫手势 
UISwipeGestureRecognizer *swipeGR = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeAction:)];

// 轻扫手势的回调方法
- (void)swipeAction:(UISwipeGestureRecognizer *)sender{ 
    if (sender.state == UIGestureRecognizerStateEnded) { 
    UIActionSheet *actionSheet = [[UIActionSheet alloc]initWithTitle:@"槽尼玛" delegate:self cancelButtonTitle:@"纸张" destructiveButtonTitle:@"哈哈哈" otherButtonTitles:@"切毛毛", nil]; 
    [actionSheet showInView:self.window]; 
}}

给imageView视图添加手势

// 给图片添加手势 一个视图可以添加多种手势，但是一个手势，只能添加到一个视图上 
[imageView addGestureRecognizer:tapGR];
[imageView addGestureRecognizer:pinchGR];
[imageView addGestureRecognizer:rotaGR]; 
[imageView addGestureRecognizer:panGR]; 
[imageView addGestureRecognizer:edgePanGR]; 
[imageView addGestureRecognizer:longPressPR];
[imageView addGestureRecognizer:swipeGR];

当一个视图上想要添加多种手势的时候就要用到手势的代理(重点)

pragma mark ----手势的代理方法

// 使得多个手势可以同时响应
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{ 
// 返回值为YES的时候，当执行一个手势的操作的时候，也可以执行其他手势的操作 
    return YES;
}