目前 UIViewController 未完全显示

Question

从 UITabBarViewController~>RootViewController 呈现 UIViewController。

let uploadViewController = UIStoryboard.identifier(.Home).instantiateViewController(identifier: "UploadViewController") as! UploadViewController
let navigationController = UINavigationController(rootViewController: uploadViewController)
navigationController.modalPresentationStyle = .overFullScreen
navigationController.statusBar(colour: .ThemeColor)
self.present(navigationController, animated: false, completion: nil)

//上传视图控制器

override func viewDidLoad() {
    super.viewDidLoad()
    self.addCrossAction()
    setTitle(text: "Upload")

    // Do any additional setup after loading the view.
}

func addCrossAction(){
    navigationController?.navigationBar.backgroundColor = .ThemeColor
    navigationController?.isNavigationBarHidden = false
    navigationController?.navigationBar.hide_NavigationBar_BottonLine()
    let button = UIButton(frame: CGRect(x: 0, y: 0, width: 30, height: 30))
    button.setImage(UIImage(named: "crossButtonWhite"), for: .normal)
    button.addTarget(self, action: #selector(crossButtonClicked), for: .touchUpInside)
    navigationItem.leftBarButtonItem = UIBarButtonItem(customView: button)
}

观察到 NavigationBar Not Complete 显示..

请在下面找到图片。

如何拥有完整的 blue.ThemeColor NavigationBar。

Answer 1

代替：

navigationController?.navigationBar.backgroundColor = .ThemeColor

尝试：

UINavigationBar.appearance().barTintColor = .ThemeColor

或（iOS > 13）：

UINavigationBarAppearance().backgroundColor = .ThemeColor

Answer 2

如果你想要带有大标题的总蓝条

navigationController?.navigationBar.prefersLargeTitles = true
navigationItem.largeTitleDisplayMode = .always

否则在您的表格视图顶部设置一个带有 ThemeColor 背景的虚拟视图，并将表格锚定到虚拟视图底部，然后再分配给您的导航栏背景颜色以清除。

声明你的 dummyView：

let dummyView = UIView()

在 viewDidLoad 中：

dummyView.backgroundColor = .ThemeColor
dummyView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(dummyView)
dummyView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
dummyView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
dummyView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
dummyView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true

之后将 tableView 顶部约束分配给 dummyView 底部约束...如果您搜索扩展程序以编程方式设置导航栏，请查看我的https://stackoverflow.com/a/58361273/5575955