Touch觸摸
// 碰到屏幕就會觸發(fā)該方法

• (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
  {
  NSLog(@"觸碰到了");
  UITouch *touch = [touches anyObject];
  // 獲取點擊坐標
  CGPoint point = [touch locationInView:self.view];
  NSLog(@"%f, %f", point.x, point.y);
  }
  Tap點按
  UITapGestureRecognizer *doubleTgr = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(doubleTagr:)];
  // 點擊的次數(shù)
  //doubleTgr.numberOfTapsRequired = 2;
  [self.imageView addGestureRecognizer:doubleTgr];
  LongPress長按
  UILongPressGestureRecognizer *lpgr = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(lpgrStart:)];
  [self.imageView addGestureRecognizer:lpgr];
  Swipe輕掃
  // 由于輕掃只能識別一個方向，所以把他的四個方向放在一個數(shù)組里留著以后辨別，這樣就能識別四個方向了
  NSArray *arr = @[[NSNumber numberWithUnsignedInteger:UISwipeGestureRecognizerDirectionDown],[NSNumber numberWithUnsignedInteger:UISwipeGestureRecognizerDirectionUp],[NSNumber numberWithUnsignedInteger:UISwipeGestureRecognizerDirectionLeft],[NSNumber numberWithUnsignedInteger:UISwipeGestureRecognizerDirectionRight]];
  for (int i=0; i<arr.count; i++) {
  UISwipeGestureRecognizer *swiper = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swiper:)];
  //把方向取出來
  NSNumber *direction = arr[i];
  // 把方向轉為Integer類型賦給輕掃的方向
  swiper.direction = [direction unsignedIntegerValue];
  [self.imageView addGestureRecognizer:swiper];
  }

• (void)swiper:(UISwipeGestureRecognizer *)swiper
  {
  if (swiper.direction == UISwipeGestureRecognizerDirectionDown) {
  NSLog(@"向下");
  }
  if (swiper.direction & UISwipeGestureRecognizerDirectionLeft) {
  NSLog(@"向左");
  }
  if (swiper.direction & UISwipeGestureRecognizerDirectionRight) {
  NSLog(@"向右");
  }
  if (swiper.direction & UISwipeGestureRecognizerDirectionUp) {
  NSLog(@"向上");
  }
  }
  Rotation旋轉
  // 創(chuàng)建一個手勢
  UIRotationGestureRecognizer *rotion = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotion:)];
  // 手勢添加在控件上
  [self.imageView addGestureRecognizer:rotion];

• (void)rotion:(UIRotationGestureRecognizer *)rotion
  {
  NSLog(@"%f", rotion.rotation);
  rotion.view.transform = CGAffineTransformRotate(rotion.view.transform, rotion.rotation);
  // 由于此方法是旋轉過程中反復調用的，所以旋轉弧度很容易疊加，要及時清零才正常一點
  rotion.rotation = 0;
  }
  Pinch捏合
  UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinch:)];
  [self.imageView addGestureRecognizer:pinch];

• (void)pinch:(UIPinchGestureRecognizer *)pinch
  {
  // 放大縮小的比例
  NSLog(@"%f", pinch.scale);

  pinch.view.transform = CGAffineTransformScale(pinch.view.transform, pinch.scale, pinch.scale);
  // 把伸縮比例及時變?yōu)?，防止伸縮效果疊加
  pinch.scale = 1;
  }
  Pan拖拽
  UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(pan:)];
  [self.imageView addGestureRecognizer:pan] ;

• (void)pan:(UIPanGestureRecognizer *)pan
  {
  // 記錄原來的位置
  static CGPoint center;

  if (pan.state == UIGestureRecognizerStateBegan) {
  center = pan.view.center;
  }

  // 獲取偏移量
  CGPoint point = [pan translationInView:self.view];
  // 最后拖拽手勢所在view的中心點，就是原來的位置加上變動的位置
  pan.view.center = CGPointMake(center.x + point.x, center.y + point.y);
  }
  Double手勢疊加
  //可以添加多個手勢
  // 一個控件可以添加多個手勢，但一個手勢不能添加在多個控件上
  添加多個手勢時要遵守<UIGestureRecognizerDelegate>協(xié)議

// 返回yes，允許同時添加多個手勢

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