UIPreviewInteraction 3d按压

• (instancetype)initWithView:(UIView *)view
  view：要按压的view
• (CGPoint)locationInCoordinateSpace:(id<UICoordinateSpace>)coordinateSpace;
  返回用户当前按压屏幕的坐标
• (void)cancelInteraction;
  停止

代理

• (void)previewInteraction:(UIPreviewInteraction *)previewInteraction didUpdatePreviewTransition:(CGFloat)transitionProgress ended:(BOOL)ended UIKIT_AVAILABLE_IOS_ONLY(10_0); // transitionProgress ranges from 0 to 1
• (void)previewInteractionDidCancel:(UIPreviewInteraction *)previewInteraction