IOS  手势操作详解及实例总结篇

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer;

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

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

  // 设置代理
  tap.delegate = self;

  // 设置点击次数触发手势事件
  tap.numberOfTapsRequired = 1;

  // 设置需要点击的手指数
  tap.numberOfTouchesRequired = 1;

  [self.image addGestureRecognizer:tap];

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

  // 代理
  longPress.delegate = self;

  // 设置最小间隔时间, 手指按下与离开间隔时间
  longPress.minimumPressDuration = 1.0;

  // 按下过程中允许移动的像素
  longPress.allowableMovement = 30;

  [self.image addGestureRecognizer:longPress];

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

  // 代理
  pinch.delegate = self;

  // 设置缩放比例
  pinch.scale = 1.2;

  [self.image addGestureRecognizer:pinch];

- (void)setupRotation
{
  UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotation:)];

  // 设置代理
  rotation.delegate = self;

  [self.image addGestureRecognizer:rotation];
}

- (void)rotation:(UIRotationGestureRecognizer *)rotation
{
  // 旋转角度
  CGFloat radian = rotation.rotation;

  self.image.transform = CGAffineTransformRotate(self.image.transform, radian);

  // 复位，保证每次都是在上一次位置开始转，而不是每次都回归初始位置再转
  rotation.rotation = 0;
}

typedef NS_OPTIONS(NSUInteger, UISwipeGestureRecognizerDirection) {
  UISwipeGestureRecognizerDirectionRight = 1 << 0, // 从左向右
  UISwipeGestureRecognizerDirectionLeft = 1 << 1, // 从右向左
  UISwipeGestureRecognizerDirectionUp  = 1 << 2, // 从下往上
  UISwipeGestureRecognizerDirectionDown = 1 << 3 // 从上往下
};

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

  // 设置代理
  swipeUp.delegate = self;

  // 修改方向, 从下往上
  swipeUp.direction = UISwipeGestureRecognizerDirectionUp;

  [self.image addGestureRecognizer:swipeUp];

  // 添加其他方向手势
  UISwipeGestureRecognizer *swipeDown = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];

  // 修改方向, 从下往上
  swipeDown.direction = UISwipeGestureRecognizerDirectionDown;

  [self.image addGestureRecognizer:swipeDown];

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

  // 设置代理
  pan.delegate = self;

  [self.image addGestureRecognizer:pan];

  // 手势的触摸点
  // CGPoint p = [pan locationInView:self.image];

  // 手势的移动点(每次移动的位移点)
  CGPoint transP = [pan translationInView:self.image];

  NSLog(@"%f, %f", transP.x, transP.y);

  self.image.transform = CGAffineTransformTranslate(self.image.transform, transP.x, transP.y);

  // 复位
  [pan setTranslation:CGPointZero inView:self.image];