IOS的七種手勢，IOS七種手勢

IOS的七種手勢，IOS七種手勢

今天為大家介紹一下IOS 的七種手勢，手勢在開發中經常用到，所以就簡單 通俗易懂的說下， 話不多說，直接看代碼：

// 初始化一個UIimageView    UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(100, 100, 300, 300)];    imageView.image = [UIImage imageNamed:@"12.jpg"];// UIImageView的使用者互動是預設關閉的，要想使他可以處理觸摸事件，我們得手動開啟它    [imageView setUserInteractionEnabled:YES];    [self.window addSubview:imageView];

 //初始化一個視圖（響應者）來承載手勢    /*UIView *gestureView = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];    //當前視圖放置到螢幕中央    gestureView.center = self.window.center;    gestureView.backgroundColor = [UIColor yellowColor];    [self.window addSubview:gestureView];

1、輕拍手勢

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

1.設定觸控對象，和輕拍的次數

    //設定觸控對象的個數（幾個手指）    [tapGR setNumberOfTouchesRequired:1];    //設定輕拍次數    [tapGR setNumberOfTapsRequired:2];

//給建立好的視圖添加手勢    [gestureView addGestureRecognizer:tapGR];

//輕拍手勢的回調方法- (void)tapAction:(UITapGestureRecognizer*)sender{    //可以根據手勢得到它當前所作用的視圖    UIImageView *imageView = (UIImageView*)sender.view;    //得到textfield viewWithTag此方法的傳回值為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，所以需要強制轉換    UITextField *textField = (UITextField*)[self.window viewWithTag:1000]; //回收鍵盤，取消第一響應者   [textField resignFirstResponder];    NSLog(@"我輕拍了gestureView");}

2、捏合手勢

//建立捏合手勢    UIPinchGestureRecognizer* pinchGR = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchAction:)];    pinchGR.delegate = self; // 可以在同一個視圖上實現多個手勢

//捏合手勢的回調方法- (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仿射變換函數中的縮放函數來實現視圖的放大縮小    //是在原有基礎上來改變當前的視圖    //函數的第一個參數：現有的視圖的transform值    //第二個參數：x軸上的縮放比率    //第三個參數:y軸上的縮放比率    //是在視圖最初的transform狀態上改變，不管執行多少次，都是以該視圖最初的transform狀態為基礎來改變    view.transform = CGAffineTransformMakeScale(2, 2);    view.transform = CGAffineTransformScale(view.transform, scale, scale);    //每次捏合動作完畢之後，讓此捏合值複原，使得它每次都是從100%開始縮放    sender.scale = 1;}

3、旋轉手勢

//旋轉手勢    UIRotationGestureRecognizer* rotaGR = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotaAction:)];    rotaGR.delegate = self;

//旋轉手勢回調方法- (void)rotaAction:(UIRotationGestureRecognizer*)sender{    //通過手勢的到旋轉角度    float rota = sender.rotation;    //得到該手勢作用的視圖    UIView *view = sender.view;    //通過2D仿射變換函數中的旋轉函數來使得當前視圖旋轉。    view.transform = CGAffineTransformRotate(view.transform, rota);    //複原    sender.rotation = 0;}

4、平移手勢

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

//平移手勢的回調方法- (void)panAction:(UIPanGestureRecognizer*)sender{    //得到當前手勢所在視圖    UIView *view = sender.view;    //得到我們在視圖上移動的位移量    CGPoint currentPoint = [sender translationInView:view.superview];    //通過2D仿射變換函數中與位移有關的函數實現視圖位置變化    view.transform = CGAffineTransformTranslate(view.transform, currentPoint.x, currentPoint.y);    //複原 // 每次都是從00點開始    [sender setTranslation:CGPointZero inView:view.superview];}

5、邊緣撥動手勢

//邊緣撥動手勢    UIScreenEdgePanGestureRecognizer *edgePanGR = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(edgePanAction:)];    edgePanGR.edges = UIRectEdgeAll;

//邊緣撥動手勢回調方法- (void)edgePanAction:(UIScreenEdgePanGestureRecognizer*)sender{    NSLog(@"我成功的觸發了螢幕側邊手勢");}

6、長按手勢

// 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、撥動手勢

 // ⑦撥動手勢    UISwipeGestureRecognizer *swipeGR = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeAction:)];

// ⑦撥動手勢的回調方法- (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];    }}

給imageView視圖添加手勢

// 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];

當一個視圖上想要添加多種手勢的時候就要用到手勢的代理(重點)

pragma mark ----手勢的代理方法

// 使得多個手勢可以同時響應- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{    // 傳回值為YES的時候，當執行一個手勢的操作的時候，也可以執行其他手勢的操作    return YES;}