ios - 如何为整个应用程序自定义UINavigationBar？

这个问题与之前提出的问题有所不同。那就好

整个应用程序均具有不同颜色的导航栏。

整个应用程序的导航栏中没有几个选项。他们都是一样的。

我期望吗？

我已经为UINavigationController创建了此扩展名，并且能够根据将要使用的视图控制器来更改导航栏的背景色。

extension UINavigationController {

    func updateNavigationBar(withViewControllerID identifier: String?) {

        setupNavigationBarButtons()

        if identifier == kFirstVCIdentifier {
            self.navigationBar.tintColor = .white
            self.navigationBar.barTintColor = .red
        } else if identifier == kSecondVCIdentifier {
            self.navigationBar.tintColor = .white
            self.navigationBar.barTintColor = .green
        } else if identifier == kThirdVCIdentifier {
            self.navigationBar.tintColor = .white
            self.navigationBar.barTintColor = .blue
        }

        self.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.white]

        self.navigationBar.isTranslucent = false
        self.navigationBar.clipsToBounds = false
        self.navigationBar.shadowImage = UIImage.init()
        self.view.backgroundColor = .clear
    }

    internal func setupNavigationBarButtons() {
        let barButtonItemSettings = UIBarButtonItem.init(title: "Settings", style: .plain, target: self, action: #selector(actionSettings))
        let barButtonItemSpace = UIBarButtonItem.init(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
        let barButtonItemLogOut = UIBarButtonItem.init(title: "LogOut", style: .plain, target: self, action: #selector(actionLogOut))
        let buttons = [barButtonItemSettings, barButtonItemSpace, barButtonItemLogOut]
        self.navigationItem.rightBarButtonItems = buttons
    }

    @objc internal func actionSettings() {
        print("Settings")
    }

    @objc internal func actionLogOut() {
        print("LogOut")
    }
}

然后，我试图在该扩展名中添加UIBarButton，但它们没有显示出来。所以我需要修复它。如果它是可见的，我该如何调用它的action以便我可以在整个应用程序中处理UIBarButton的touch事件。 正确吗？请没有补丁。

我正在这样使用它:

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
  self.navigationController?.updateNavigationBar(withViewControllerID: self.restorationIdentifier?)
}

最佳答案

尝试此操作，并为UINavigationItem扩展。

extension UINaviationItem {

func setupNavigationBarButtons()
{
    let barButtonItemSettings = UIBarButtonItem.init(title: "Settings", style: .plain, target: self, action: #selector(actionSettings))
    let barButtonItemSpace = UIBarButtonItem.init(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
    let barButtonItemLogOut = UIBarButtonItem.init(title: "LogOut", style: .plain, target: self, action: #selector(actionLogOut))
    let buttons = [barButtonItemSettings, barButtonItemSpace, barButtonItemLogOut]
    self.rightBarButtonItems = buttons
}

@objc  func actionSettings() {

    print("Settings")

  if let current = UIApplication.shared.delegate?.window
    {
        var viewcontroller = current!.rootViewController
        if(viewcontroller is UINavigationController){
            viewcontroller = (viewcontroller as! UINavigationController).visibleViewController

            print( "currentviewcontroller is %@/",viewcontroller )
    }
    }
}
@objc  func actionLogOut() {
    print("LogOut")
}

}

self.navigationController?.updateNavigationBar(withViewControllerID: "second")
self.navigationItem.setupNavigationBarButtons()