uiview不会以编程方式显示在uiscrollview中

Question

我在uiscrollview中有一个uiview容器。但它不会在scrollview中显示。当我在调试视图层次结构中检查宽度时，模棱两可。在这里，我显示了图片和我的代码设置。

        view.addSubview(scrollView)
        scrollView.contentSize.height   = 1000
        scrollView.backgroundColor      = #colorLiteral(red: 0.968627451, green: 0.968627451, blue: 0.968627451, alpha: 1)
        scrollView.anchor(top: view.topAnchor, trailing: view.trailingAnchor, bottom: view.bottomAnchor, leading: view.leadingAnchor, topPadding: 0, rightPadding: 0, bottomPadding: 0, leftPadding: 0, width: 0, height: 0)

        scrollView.addSubview(navigationView)
        navigationView.addSubview(titleLbl)
        navigationView.addSubview(profileIV)

        navigationView.backgroundColor  = .red

        navigationView.anchor(top: scrollView.topAnchor, trailing: scrollView.trailingAnchor, bottom: nil, leading: scrollView.leadingAnchor, topPadding: 0, rightPadding: 0, bottomPadding: 0, leftPadding: 0, width: 0, height: 200)

        titleLbl.anchor(top: navigationView.topAnchor, trailing: nil, bottom: nil, leading: navigationView.leadingAnchor, topPadding: 40, rightPadding: 0, bottomPadding: 0, leftPadding: 16, width: 50, height: 23)

        profileIV.anchor(top: navigationView.topAnchor, trailing: nil, bottom: nil, leading: nil, topPadding: 80, rightPadding: 0, bottomPadding: 0, leftPadding: 0, width: 68, height: 68)
        profileIV.centerXAnchor.constraint(equalTo: navigationView.centerXAnchor).isActive = true

        profileNameLbl.anchor(top: profileIV.bottomAnchor, trailing: nil, bottom: nil, leading: nil, topPadding: 10, rightPadding: 0, bottomPadding: 0, leftPadding: 0, width: 0, height: 27)
        profileNameLbl.centerXAnchor.constraint(equalTo: navigationView.centerXAnchor).isActive = true

Answer 1

您必须将代码更改为：

//您的滚动视图

//您的navigationView

并添加到yourViewController : UIViewController, UIScrollViewDelegate

在viewDidLoad :

yourScrollView.contentSize = CGSize(width: yourNavigationView.frame.width, height: yourNavigationView.frame.height)
    scroll.delegate = self

然后在导航视图内执行所需的任何操作。

此外，如果需要，您可以添加此代码：

func scrollViewDidScroll(_ scrollView: UIScrollView) {
    if scrollView == scroll{
        if scrollView.contentOffset.x != 0 {
            scrollView.contentOffset.x = 0
        }
    }
}

希望有帮助...

Answer 2

通过编程方式进行。好的，请尝试使用此]

open class BaseScrollViewController: UIViewController {

lazy var contentViewSize = CGSize(width: self.view.frame.width, height: self.view.frame.height + 100)

lazy var scrollView: UIScrollView = {
    let view = UIScrollView(frame: .zero)
    view.backgroundColor = .white
    view.frame = self.view.bounds
    view.contentSize = contentViewSize
    return view
}()

lazy var containerView: UIView = {
    let v = UIView()
    v.backgroundColor = .clear
    v.frame.size = contentViewSize
    return v
}()

override open func viewDidLoad() {
    super.viewDidLoad()
    view.addSubviews(scrollView)
    view.backgroundColor = .white
    scrollView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
    scrollView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
    scrollView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
    scrollView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true

    scrollView.addSubview(containerView)
    setupContainer(containerView)
}

public func setupContainer(_ container: UIView) {

}

}

用法：

class ClientScrollViewController: BaseScrollViewController {

override func viewDidLoad() {
    super.viewDidLoad()
}

override func setupContainer(_ container: UIView) {
    //add your views here
}

}