iOS常用手势识别器

Posted 2020-09-11

手势识别状态：

typedef NS_ENUM(NSInteger, UIGestureRecognizerState) {

    // 没有触摸事件发生，所有手势识别的默认状态

    UIGestureRecognizerStatePossible,

    // 一个手势已经开始但尚未改变或者完成时

    UIGestureRecognizerStateBegan,

    // 手势状态改变

    UIGestureRecognizerStateChanged,

    // 手势完成

    UIGestureRecognizerStateEnded,

    // 手势取消，恢复至Possible状态

    UIGestureRecognizerStateCancelled,

    // 手势失败，恢复至Possible状态

    UIGestureRecognizerStateFailed,

    // 识别到手势识别

    UIGestureRecognizerStateRecognized = UIGestureRecognizerStateEnded

};

 

需要同时支持多种手势时实现delegate方法，返回YES，可判断几种手势同时进行

// 该方法返回的BOOL值决定了view是否能够同时响应多个手势

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer

{

    NSLog(@"%@ - %@", gestureRecognizer.class, otherGestureRecognizer.class);

    return YES;

}

 

 

1.点击识别器

 

// 创建点击手势识别器，并监听

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapTouch)];

// 设置手势识别器属性

// 点击几次响应

tap.numberOfTapsRequired = 2;

// 几个手指同时点击

tap.numberOfTouchesRequired = 2;

// 添加手势识别器

[self.uiimageView addGestureRecognizer:tap];

 

2.长按识别器

// 创建长按识别器，并监听

UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(LongPressTouch)];

// 设置属性

// 多长时间响应

longPress.minimumPressDuration = 5;

// 按下后事件响应之前允许手指移动偏移位

longPress.allowableMovement = 10;

// 添加识别器

[self.view1 addGestureRecognizer:longPress];

 

3.轻扫

// 支持的手势方向枚举类型

typedef NS_OPTIONS(NSUInteger, UISwipeGestureRecognizerDirection) {

    UISwipeGestureRecognizerDirectionRight = 1 << 0,    // 向右

    UISwipeGestureRecognizerDirectionLeft  = 1 << 1,    // 向左

    UISwipeGestureRecognizerDirectionUp    = 1 << 2,    // 向上

    UISwipeGestureRecognizerDirectionDown  = 1 << 3     // 向下

};

 

// 创建轻扫识别器，并监听如果要同时使用多个方向，分别创建多个轻扫识别器

// 例：添加向左向右手势

// 向左

UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(SwipehTouch)];

swipe.direction = UISwipeGestureRecognizerDirectionLeft;

[self.view1 addGestureRecognizer:swipe];

// 向右

UISwipeGestureRecognizer *swipe2 = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(SwipehTouch)];

swipe2.direction = UISwipeGestureRecognizerDirectionRight;

[self.view1 addGestureRecognizer:swipe2];

 

/**

 * 旋转、捏合和拖拽注意点：当手指松开后会重置值，如果需要进行缩放旋转等操作，需在适当地方给返回的值赋值

 */

4.旋转

// 创建旋转识别器，并监听

UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(RotationTouch:)];

 

[self.view1 addGestureRecognizer:rotation];

 

// 注意点

- (void)RotationTouch:(UIRotationGestureRecognizer *)routation

{

    NSLog(@"旋转");

    // 每次加上之前的角度

    self.view1.transform = CGAffineTransformRotate(self.view1.transform, routation.rotation);

    // 将旋转角度清0

    routation.rotation = 0;

}

 

5.捏合

// 创建捏合手势

UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchTouch:)];

 

[self.view1 addGestureRecognizer:pinch];

 

// 注意点

- (void)pinchTouch:(UIPinchGestureRecognizer *)pinch

{

    NSLog(@"捏合");

    self.view1.transform = CGAffineTransformScale(self.view1.transform, pinch.scale, pinch.scale);

    pinch.scale = 1.0;

}

 

6.拖拽

// 创建拖拽手势

UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(PanTouch)];

 

[self.view1 addGestureRecognizer:pan];

// 注意点

- (void)PanTouch:(UIPanGestureRecognizer *)pan

{

    // 获取移动的坐标

    CGPoint point = [pan translationInView:pan.view];

    

    NSLog(@"拖拽");

    CGPoint temp = self.view1.center;

    temp.x += point.x;

    temp.y += point.y;

    self.view1.center = temp;

    

    // 必须加

    [pan setTranslation:CGPointZero inView:pan.view];

}

 

DEMO 链接: http://pan.baidu.com/s/1qW3VmUg 密码: 9pqk