导航栏在iPhone XS Max swift上关闭视图控制器上的视图

Question

我有两个视图控制器VC1和VC2，首先，我展示VC1并以编程方式创建导航栏，并在其中放置两个按钮，此后，我展示VC2并以编程方式创建导航栏。现在，当我将VC2更改为VC1时，它会将视图削减到导航栏的一半，并且按钮也会被切除。我尝试了不同的解决方案，但没有解决。我很困惑为什么要削减视野？这是我的代码，用于在VC1中创建导航栏，

let width = self.view.frame.width
    let navigationBar: UINavigationBar = UINavigationBar(frame: CGRect(x: 0, y: 20, width: width, height: 64))
    UINavigationBar.appearance().barTintColor = .white
    UINavigationBar.appearance().tintColor = .white
    UINavigationBar.appearance().isTranslucent = false
    self.view.addSubview(navigationBar);
    let navigationItem = UINavigationItem(title: "Owners")
    self.title = "Owners"
    let cancelBtn = UIButton()
    let searchBtn = UIButton()
    cancelBtn.setImage(UIImage.init(named: "cancelBtn")?.tint(with: #colorLiteral(red: 0, green: 0, blue: 0, alpha: 1)), for: .normal)
    cancelBtn.frame = CGRect(x: 0, y: 0, width: 20, height: 20)
    cancelBtn.addTarget(self, action: #selector(onTapBack), for: .touchUpInside)
    let suggestButtonContainer = UIView(frame: cancelBtn.frame)
    suggestButtonContainer.addSubview(cancelBtn)
    searchBtn.setImage(Icon.cm.search?.tint(with: #colorLiteral(red: 0, green: 0, blue: 0, alpha: 1)), for: .normal)
    searchBtn.frame = CGRect(x: 0, y: 0, width: 30, height: 30)
    searchBtn.addTarget(self, action: #selector(onTapSearch), for: .touchUpInside)
    let searchView = UIView(frame: searchBtn.frame)
    searchView.addSubview(searchBtn)
    let searchButtonItem = UIBarButtonItem(customView: searchView)
    let suggestButtonItem = UIBarButtonItem(customView: suggestButtonContainer)
    navigationItem.leftBarButtonItem = suggestButtonItem
    navigationItem.rightBarButtonItem = searchButtonItem
    navigationBar.setItems([navigationItem], animated: false)

这就是我创建VC2导航栏的方式，

let width = self.view.frame.width
    let navigationBar: UINavigationBar = UINavigationBar(frame: CGRect(x: 0, y: 25, width: width, height: 64))
    UINavigationBar.appearance().barTintColor = .white
    UINavigationBar.appearance().tintColor = .white
    UINavigationBar.appearance().isTranslucent = false
    self.view.addSubview(navigationBar);
    let navigationItem = UINavigationItem(title: "Owners")
    self.title = "Owners"
    let cancelBtn = UIButton()
    cancelBtn.setImage(UIImage.init(named: "cancelBtn")?.tint(with: #colorLiteral(red: 0, green: 0, blue: 0, alpha: 1)), for: .normal)
    cancelBtn.frame = CGRect(x: 0, y: 0, width: 20, height: 20)
    cancelBtn.addTarget(self, action: #selector(onTapBack), for: .touchUpInside)
    let suggestButtonContainer = UIView(frame: cancelBtn.frame)
    suggestButtonContainer.addSubview(cancelBtn)
    let suggestButtonItem = UIBarButtonItem(customView: suggestButtonContainer)
    navigationItem.leftBarButtonItem = suggestButtonItem
    navigationBar.setItems([navigationItem], animated: false)

现在，当从VC2转到VC1时，它会显示如下所示的导航栏，

Answer 1

我认为问题出在状态栏高度。

尝试将导航栏框架origin.y设置为UIApplication.shared.statusBarFrame.height

let navigationBar: UINavigationBar = UINavigationBar(frame: CGRect(x: 0, y: UIApplication.shared.statusBarFrame.height, width: width, height: 64))