Question

我是新手，标题是，想要实现自定义拖动和放大器放入UITableView，而每个UITableViewCell内容（cell.content？）将包含自定义UIView。例如。 Row1-cell-CustomUIView1，Row2-cell-CustomUIView2。哪个自定义UIView添加到哪一行基于该行上的用户选择和按钮单击。现在假设您有4个自定义UIViews，即在UITableView中添加到4行/单元格中，如何实现这些CustomUIView的拖放？注意，每个自定义UIView可能与典型的表格单元格不同。即自定义UIView1布局/设计与自定义UIView2不同。快速实施，任何想法？

Answer 1

这可以帮助你，在mainImgView中添加一个UIPanGestureRecognizer来处理拖动：

var draggableImage : UIImageView!
var mainImgView : UIImageView!
var trashImgView : UIImageView!
var dragStartPositionRelativeToCenter : CGPoint?
var panGesture : UIPanGestureRecognizer!

panGesture = UIPanGestureRecognizer(target: self, action: "handleDrag:")
mainImgView.addGestureRecognizer(panGesture)

func handleDrag(nizer: UIPanGestureRecognizer!) {
   if nizer.state == UIGestureRecognizerState.Began {
      self.draggableImage = UIImageView(image: mainImgView.image)
      self.draggableImage.frame = CGRectMake(0, 0, 100, 100)
      self.draggableImage.center = mainImgView.center
      self.draggableImage.contentMode = .ScaleAspectFit
      self.draggableImage.userInteractionEnabled = true
      self.draggableImage.alpha = 0.5

      self.view.addSubview(self.draggableImage)
      self.view.bringSubviewToFront(sself.draggableImage)

      let locationInView = nizer.locationInView(self.draggableImage.superview)
      dragStartPositionRelativeToCenter = CGPoint(x: locationInView.x - self.draggableImage.center.x, y: locationInView.y - self.draggableImage.center.y)

      self.draggableImage.layer.shadowOffset = CGSize(width: 0, height: 20)
      self.draggableImage.layer.shadowOpacity = 0.3
      self.draggableImage.layer.shadowRadius = 6

      return
  }

  if nizer.state == UIGestureRecognizerState.Changed {
     let locationInView = nizer.locationInView(self.draggableImage.superview)
     UIView.animateWithDuration(0.1) {
        self.draggableImage.center = CGPoint(x: locationInView.x - self.dragStartPositionRelativeToCenter!.x,
            y: locationInView.y - self.dragStartPositionRelativeToCenter!.y)
    }

      var checkAddToBag : Bool = CGRectContainsRect(self.draggableImage.frame, self.trashImgView.frame)

      if (checkAddToBag == true){
        self.trashImgView.layer.borderColor = UIColor.redColor().CGColor
        self.trashImgView.layer.borderWidth = 1.0
    } else {
        self.trashImgView.layer.borderColor = UIColor.clearColor().CGColor
        self.trashImgView.layer.borderWidth = 0.0
      }

      return
   }

   if nizer.state == UIGestureRecognizerState.Ended {
      var checkAddToBag : Bool = CGRectContainsRect(self.draggableImage.frame, self.trashImgView.frame)

      self.trashImgView.layer.borderColor = UIColor.clearColor().CGColor
      self.trashImgView.layer.borderWidth = 0.0

      dragStartPositionRelativeToCenter = nil

      self.draggableImage.removeFromSuperview()
      self.draggableImage = nil

      return
   }
}

拖放UITableViewCell，其中包含cell.content中的自定义UIView

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