快速滚动条不滚动

Question

我有一个 Swift 代码

    background_img_view.addSubview(background_image)
    background_img_view.addSubview(usn)
    profile_view.addSubview(PostsDiv)
    profile_view.addSubview(PostDiv)
    var scrollView: UIScrollView!
    scrollView = UIScrollView(frame: view.bounds)
    scrollView.contentSize = CGSize(width: self.view.frame.size.width, height: 1500)
    scrollView.autoresizingMask = UIViewAutoresizing.flexibleHeight
    scrollView.isScrollEnabled = true
    scrollView.addSubview(profile_view)
    view.addSubview(background_img_view)
    view.addSubview(scrollView)

我在手机上测试了这个，滚动条正在显示，但是当我滚动时没有任何变化，我也无法点击屏幕上的任何内容

Answer 1

您将所有内容锚定到背景图像的底部，但背景图像不在 ScrollView 中，因此滚动时不会发生任何移动。

您需要将 view.addSubview(background_img_view) 替换为 scrollView.addSubview(background_img_view)

您还需要将背景 ImageView 的顶部 anchor 和背景图像更改为scrollView的顶部。

替换:

background_img_view.anchor(view.topAnchor, left:view.leftAnchor, bottom: about.bottomAnchor, right: view.rightAnchor, topConstant: 60, leftConstant: 0, bottomConstant: 0, rightConstant: 0, widthConstant: 0, heightConstant: 280)
background_image.anchor(view.topAnchor, left:view.leftAnchor, bottom: nil, right: view.rightAnchor, topConstant: 60, leftConstant: 0, bottomConstant: 0, rightConstant: 0, widthConstant: 0, heightConstant: 280)

与

background_img_view.anchor(scrollView.topAnchor, left:view.leftAnchor, bottom: about.bottomAnchor, right: view.rightAnchor, topConstant: 60, leftConstant: 0, bottomConstant: 0, rightConstant: 0, widthConstant: 0, heightConstant: 280)
background_image.anchor(scrollView.topAnchor, left:view.leftAnchor, bottom: nil, right: view.rightAnchor, topConstant: 60, leftConstant: 0, bottomConstant: 0, rightConstant: 0, widthConstant: 0, heightConstant: 280)