ios - 如何从 ScrollView 中删除 subview

Question

如何删除选定的 ScrollView 模糊效果

创建 ScrollView

 for i in 0 ... totalPage {

        let cardView = Bundle.main.loadNibNamed("cardView", owner: self, options: nil)?[0] as! UIView

        cardView.frame = CGRect(x: CGFloat(i) * CardScroll.frame.size.width, y: CardScroll.frame.origin.y, width: CardScroll.frame.size.width, height: CardScroll.frame.size.height)

        let blureffect = UIBlurEffect(style: UIBlurEffectStyle.light)

        blureffectView = UIVisualEffectView(effect: blureffect)
        blureffectView.frame = CGRect(x: CGFloat(i) * CardScroll.frame.size.width, y: CardScroll.frame.origin.y, width: CardScroll.frame.size.width, height: CardScroll.frame.size.height)

        CardScroll.addSubview(cardView)
        CardScroll.addSubview(blureffectView)

    }

双击 Action 移除模糊效果

func doubleTapped() {
    let pageNumber = CardPage.currentPage

    blureffectView.frame = CGRect(x: CGFloat(pageNumber) * CardScroll.frame.size.width, y: CardScroll.frame.origin.y, width: CardScroll.frame.size.width, height: CardScroll.frame.size.height)

    blureffectView.removeFromSuperview()
}

Answer 1

在 blureffectView.frame 下方添加以下内容

 blureffectView.tag = i ; // Set tag for every view you are adding on scrollview

添加 Action 如下

func doubleTapped(sender:UIButton!){ // Pass sender as UIButton so you can get tag here 

   for subview in scrollView.subviews{ // Loop thorough ScrollView view hierarchy 
       if subview is UIVisualEffectView && subview.tag == sender.tag { // Check if view is type of VisualEffect and tag is equal to the view clicked
           subview.removeFromSuperview()
       }
   }
}