UIGestureRecognizer抽象类,六大手势是其子类;

  • UITapGestureRecognizer        点击
  • UIPinchGestureRecognizer         缩放
  • UIRotationGestureRecognizer     旋转
  • UISwipeGestureRecognizer         轻扫
  • UIPanGestureRecognizer             拖动
  • UILongPressGestureRecognizer   长按

typedef NS_ENUM(NSInteger, UIGestureRecognizerState) {//手势当前的状态

UIGestureRecognizerStatePossible, (默认)

UIGestureRecognizerStateBegan,      (开始)

UIGestureRecognizerStateChanged,(已经改变)

UIGestureRecognizerStateEnded,  (结束)

UIGestureRecognizerStateCancelled, (取消)

UIGestureRecognizerStateFailed,  (失败)

UIGestureRecognizerStateRecognized = UIGestureRecognizerStateEnded

}

一、拖动手势  UIPanGestureRecognizer

  UIPanGestureRecognizer *panGesture =[[UIPanGestureRecognize alloc]  initWithTarget:self action:@selection(handlePan:)];

  [view  addGestureRecognizer:panGesture];

- (void)handlePan:(UIPanGestureRecognizer *)panGesture{
CGPoint translation = [panGesture translationInView:self.view];
CGPoint point = CGPointMake(panGesture.view.center.x + translation.x,panGesture.view.center.y + translation.y);
panGesture.view.center = point;
[panGesture setTranslation:CGPointZero inView:self.view];
}
  

1、确保view是可交互的 view.userInteractionEnabled = yes;

2、translationInView (相对点击点的偏移量) locationInView(相对屏幕实时坐标);

3、setTranslation:CGPointZero inView(每次初始化位置) 和translationInView同时使用;

4、velocityInView (获取速度矢量)  

二、捏合手势 UIPinchGestureRecognizer

  UIPinchGestureRecognizer  *phinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget: self action:@selector(handlePinch:)];

  [view addGestureRecognizer:pinchGesture];

- (void)handlePinch:(UIPinchGestureRecognizer *)recognizer{
CGFloat scale = recognizer.scale;
recognizer.view.transform = CGAffineTransformMakeScale(scale, scale);// 每次缩放都回复原来基础下变化
// recognizer.view.transform = CGAffineTransformScale(recognizer.view.transform, scale, scale);//在已经缩放大小基础下累加变化
// recognizer.scale = 1.0;
}

  scale 缩放倍数 ,velocity 缩放速率;

三、旋转手势 UIRotationGestureRecognizer

  UIRotationGestureRecognizer  *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(handleRotaton:)];

  [view addGestureRecognizer:rotationGesture];

- (void)handleRotation:(UIRotationGestureRecognizer *)recognizer {
recognizer.view.transform = CGAffineTransformRotate(recognizer.view.transform, recognizer.rotation);
recognizer.rotation = 0.0;
}

四、点击手势 UITapGestureRecognizer

@property (nonatomic) NSUInteger  numberOfTapsRequired;       // 点击次数(默认一次)
@property (nonatomic) NSUInteger numberOfTouchesRequired __TVOS_PROHIBITED; // 需要手字数(默认一个点击点)

五、长按手势 UILongPressGestureRecognizer

@property (nonatomic) NSUInteger numberOfTapsRequired;      // Default is 0. The number of full taps required before the press for gesture to be recognized
@property (nonatomic) NSUInteger numberOfTouchesRequired __TVOS_PROHIBITED; // Default is 1. Number of fingers that must be held down for the gesture to be recognized @property (nonatomic) CFTimeInterval minimumPressDuration; // Default is 0.5. 最小长按时间
@property (nonatomic) CGFloat allowableMovement; // Default is 10. 长按时允许移动的距离

六、轻扫手势 UISwipeGestureRecognizer

typedef NS_OPTIONS(NSUInteger, UISwipeGestureRecognizerDirection) {
UISwipeGestureRecognizerDirectionRight = << ,
UISwipeGestureRecognizerDirectionLeft = << ,
UISwipeGestureRecognizerDirectionUp = << ,
UISwipeGestureRecognizerDirectionDown = <<
};
@property(nonatomic) UISwipeGestureRecognizerDirection direction; //轻扫方向

号外:同时响应多种手势

设置手势delegate实现方法

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
return YES;
}





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