// 初始化一個UIimageView
UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(100, 100, 300, 300)];
imageView.image = [UIImage imageNamed:@"12.jpg"];
// UIImageView的用戶交互是默認(rèn)關(guān)閉的，要想使他可以處理觸摸事件，我們得手動打開它
[imageView setUserInteractionEnabled:YES];
[self.window addSubview:imageView];
//初始化一個視圖（響應(yīng)者）來承載手勢
/*UIView *gestureView = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
//當(dāng)前視圖放置到屏幕中央
gestureView.center = self.window.center;
gestureView.backgroundColor = [UIColor yellowColor];
[self.window addSubview:gestureView];

//創(chuàng)建輕拍手勢
UITapGestureRecognizer *tapGR = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction:)];

//設(shè)置觸控對象的個數(shù)（幾個手指）
[tapGR setNumberOfTouchesRequired:1];
//設(shè)置輕拍次數(shù)
[tapGR setNumberOfTapsRequired:2];
//給創(chuàng)建好的視圖添加手勢
[gestureView addGestureRecognizer:tapGR];
//輕拍手勢的回調(diào)方法
- (void)tapAction:(UITapGestureRecognizer*)sender{
//可以根據(jù)手勢得到它當(dāng)前所作用的視圖
UIImageView *imageView = (UIImageView*)sender.view;
//得到textfield viewWithTag此方法的返回值為UIView類型，但是UITextField為UIView的子類，父類對象不能直接指向子類對象，所以需要強(qiáng)制轉(zhuǎn)換
UITextField *textField = (UITextField*)[self.window viewWithTag:1000];
//回收鍵盤，取消第一響應(yīng)者
[textField resignFirstResponder];
NSLog(@"我輕拍了gestureView");
}

//創(chuàng)建捏合手勢
UIPinchGestureRecognizer* pinchGR = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchAction:)];
pinchGR.delegate = self; // 可以在同一個視圖上實現(xiàn)多個手勢
//捏合手勢的回調(diào)方法
- (void)pinchAction:(UIPinchGestureRecognizer*)sender{
//通過捏合手勢的到縮放比率
float scale = sender.scale;
//得到該手勢所作用的視圖
UIView *view = sender.view;
//2D仿射變換函數(shù)中的縮放函數(shù)來實現(xiàn)視圖的放大縮小
//是在原有基礎(chǔ)上來改變當(dāng)前的視圖
//函數(shù)的第一個參數(shù)：現(xiàn)有的視圖的transform值
//第二個參數(shù)：x軸上的縮放比率
//第三個參數(shù):y軸上的縮放比率
//是在視圖最初的transform狀態(tài)上改變，不管執(zhí)行多少次，都是以該視圖最初的transform狀態(tài)為基礎(chǔ)來改變
view.transform = CGAffineTransformMakeScale(2, 2);
view.transform = CGAffineTransformScale(view.transform, scale, scale);
//每次捏合動作完畢之后，讓此捏合值復(fù)原，使得它每次都是從100%開始縮放
sender.scale = 1;
}

//旋轉(zhuǎn)手勢
UIRotationGestureRecognizer* rotaGR = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotaAction:)];
rotaGR.delegate = self;
//旋轉(zhuǎn)手勢回調(diào)方法
- (void)rotaAction:(UIRotationGestureRecognizer*)sender{
//通過手勢的到旋轉(zhuǎn)角度
float rota = sender.rotation;
//得到該手勢作用的視圖
UIView *view = sender.view;
//通過2D仿射變換函數(shù)中的旋轉(zhuǎn)函數(shù)來使得當(dāng)前視圖旋轉(zhuǎn)。
view.transform = CGAffineTransformRotate(view.transform, rota);
//復(fù)原
sender.rotation = 0;
}

//平移手勢
UIPanGestureRecognizer *panGP = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panAction:)];
//平移手勢的回調(diào)方法
- (void)panAction:(UIPanGestureRecognizer*)sender{
//得到當(dāng)前手勢所在視圖
UIView *view = sender.view;
//得到我們在視圖上移動的偏移量
CGPoint currentPoint = [sender translationInView:view.superview];
//通過2D仿射變換函數(shù)中與位移有關(guān)的函數(shù)實現(xiàn)視圖位置變化
view.transform = CGAffineTransformTranslate(view.transform, currentPoint.x, currentPoint.y);
//復(fù)原 // 每次都是從00點開始
[sender setTranslation:CGPointZero inView:view.superview];
}

//邊緣輕掃手勢
UIScreenEdgePanGestureRecognizer *edgePanGR = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(edgePanAction:)];
edgePanGR.edges = UIRectEdgeAll;
//邊緣輕掃手勢回調(diào)方法
- (void)edgePanAction:(UIScreenEdgePanGestureRecognizer*)sender{
NSLog(@"我成功的觸發(fā)了屏幕邊緣手勢");
}

// ⑥長按手勢
UILongPressGestureRecognizer *longPressPR = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressAction:)];
longPressPR.minimumPressDuration = 1;
// ⑥長按手勢的回調(diào)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:@"確定", nil];
[alertView show];
}
}

// ⑦輕掃手勢
UISwipeGestureRecognizer *swipeGR = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeAction:)];
// ⑦輕掃手勢的回調(diào)方法
- (void)swipeAction:(UISwipeGestureRecognizer *)sender{
if (sender.state == UIGestureRecognizerStateEnded) {
UIActionSheet *actionSheet = [[UIActionSheet alloc]initWithTitle:@"槽尼瑪" delegate:self cancelButtonTitle:@"紙張" destructiveButtonTitle:@"哈哈哈" otherButtonTitles:@"切毛毛", nil];
[actionSheet showInView:self.window];
}
}

// 3.給圖片添加手勢 一個視圖可以添加多種手勢，但是一個手勢，只能添加到一個視圖上
[imageView addGestureRecognizer:tapGR];
[imageView addGestureRecognizer:pinchGR];
[imageView addGestureRecognizer:rotaGR];
[imageView addGestureRecognizer:panGR];
[imageView addGestureRecognizer:edgePanGR];
[imageView addGestureRecognizer:longPressPR];
[imageView addGestureRecognizer:swipeGR];

pragma mark ----手勢的代理方法
// 使得多個手勢可以同時響應(yīng)
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
// 返回值為YES的時候，當(dāng)執(zhí)行一個手勢的操作的時候，也可以執(zhí)行其他手勢的操作
return YES;
}