IOS中的七种手势小结

// 初始化一个UIimageViewUIImageView *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];

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

//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");}

//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;}

//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;}

//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];}

//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UILongPressGestureRecognizer *longPressPR = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressAction:)];longPressPR.minimumPressDuration = 1;// ⑥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UISwipeGestureRecognizer *swipeGR = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeAction:)];// ⑦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];}}

// 3.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];

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;}