ios - 在 ScrollView 内的多个 ImageView 上点击手势不触发事件，只有第一个 ImageView 点击手势起作用？

Question

场景是我有一个 ImageView ，我已将其添加到 ScrollView 中，然后在每个 ImageView 上添加点击手势，但只有第一个 ImageView 触发事件。

已尝试以下操作:

<强>1。创建了 imageview 扩展

extension UIImageView {
  public func openMenu() {
    let tapGestureRecognizer = UITapGestureRecognizer(target:self, action:Selector("handleTapGesture:"))
    //mImg.addGestureRecognizer()
    self.addGestureRecognizer(tapGestureRecognizer)
    print("open")
  }
}

<强>2。在循环中添加了点击手势(在 ScrollView 上添加 ImageView 的方式与添加点击手势的方式相同)

//the loop go till all images will load
for var index = 0; index < imagesName.count; index++ {
  let mImg: UIImageView = UIImageView()          
  let pDict = homePageProductArr[index] as NSDictionary

  //Create a UIVIEW 
  let containerView:UIView = UIView(frame: CGRect(x: 0, y: 0, width: 80, height: 100))
  let nameLabel:UILabel = UILabel(frame:CGRect(x: xOffset+20, y: 85, width: 100, height: 20))
  nameLabel.text = (pDict.objectForKey("CategoryName") as! String)
  nameLabel.font = UIFont(name: "Helvetica Neue", size: 10.0)
  containerView.addSubview(nameLabel)

  let tapMenuCategoryImageTGR = UITapGestureRecognizer(target: self, action: Selector("handleTapGesture:"))
  containerView.addGestureRecognizer(tapMenuCategoryImageTGR)

  // make the imageview object because in scrollview we need image
  mImg.frame = CGRectMake(5 + xOffset, 0, 80, 80)
  // the offset represent the values, used so that topleft for each image will
  // change with(5+xOffset, 0)and the bottomright(160, 110)
  //mImg.image = UIImage(named: imagesName[index])
  mImg.imageFromUrl(imagesName[index])
  //mImg.imageFromServerURL(imagesName[index])
  //Creating Circular Image
  //mImg.layer.borderWidth = 1
  mImg.layer.masksToBounds = true
  mImg.layer.borderColor = UIColor.whiteColor().CGColor
  mImg.layer.cornerRadius = mImg.frame.height/2
  mImg.clipsToBounds = false
  mImg.openMenu()
  mImg.userInteractionEnabled = true
  mImg.addGestureRecognizer = tapMenuCategoryImageTGR

  // The image will put on the img object
  images.insert(mImg, atIndex: index)
  //Put the img object at the images array which is mutable array
  scrollview.contentSize = CGSizeMake(120 + xOffset, 110)
  //scroll view size show after 125 width the scroll view enabled 
  scrollview.addSubview(images[index] as! UIView)
  //set images on scroll view
  xOffset += 100
}

请分享您的建议。

Answer 1

这不是UIScrollView的问题。我们可以使用手势来查看单个 View 。下面给出了您问题的另一个解决方案 -

1. 您必须全局声明点击手势。

   var  singleTap:UITapGestureRecognizer!
   

2. 在此步骤中，我们创建一个函数，该函数采用 UIimageView 并在其顶部添加手势。

     func setGesture(img_View:UIImageView)  {
         singleTap = UITapGestureRecognizer.init(target: self, action: Selector("resignResponder"))
         singleTap.numberOfTapsRequired = 1
       view.addGestureRecognizer(singleTap)
   

   }

3. 现在创建手势操作。

   func resignResponder()  {
   
   }
   

These are the three steps as the solution of your problem . Call "setGesture" for every imageView. You can successfully recognize the tap for every imageView.