swift - 在 NavigationController 中添加右键按钮

Question

我有 Storyboard设置，所有 View Controller 扩展导航 Controller 类 NavigationController: UINavigationController, UIViewControllerTransitioningDelegate 自定义导航栏设置导航 Controller 类 CustomNavigationBar:UINavigationBar Here是 NavigationController 的代码

class NavigationController: UINavigationController, UIViewControllerTransitioningDelegate {

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

这是CustomNavigationBar

的代码

class CustomNavigationBar: UINavigationBar {

    override func awakeFromNib() {
        var font = UIFont(name: "Montserrat-Light", size: 17)!
        if "ar" == userLocale() {
            font = UIFont(name: "DroidSansArabic", size: 17)!
        }
        let attribtutes = [
            NSFontAttributeName: font,
            NSForegroundColorAttributeName: UIColor.black,
            NSKernAttributeName: 5.0
            ] as [String : Any]
        UINavigationBar.appearance().titleTextAttributes = attribtutes
        UINavigationBar.appearance().tintColor = UIColor.black
        UINavigationBar.appearance().backgroundColor = UIColor.white

        let image = UIImage(named: "back-btn")
        UIBarButtonItem.appearance().setBackButtonTitlePositionAdjustment(UIOffsetMake(0, -66), for: .default)
        UINavigationBar.appearance().backIndicatorImage = image
    }
}

到目前为止一切顺利，我现在想添加一个带有自定义 View 的右栏导航项。我尝试在 NavigationController::viewDidLoad()

中添加以下代码

let customView:UIView = UIView()
customView.backgroundColor = .green
customView.frame = CGRect(x: 0, y: 0, width: 100, height: 100)
let item = UIBarButtonItem(customView: customView)
self.navigationItem.setRightBarButton(item, animated: false)

由于某种原因，这没有显示在导航菜单中。我哪里错了？

Answer 1

您需要在您的基础 View Controller 中添加您的自定义导航按钮代码部分，因为每个 viewController 都有它自己的 navigationItem，这就是为什么您的自定义按钮没有显示

您需要使用 BaseViewController 类来满足您的需求，然后从您的 BaseViewController 中继承所有 viewController，您只需在 viewDidLoad 中添加一次导航按钮自定义代码即可。 p>

像这样

class BaseViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        let customView:UIView = UIView()
        customView.backgroundColor = .green
        customView.frame = CGRect(x: 0, y: 0, width: 100, height: 100)
        let item = UIBarButtonItem(customView: customView)
        self.navigationItem.setRightBarButton(item, animated: false) 
    }

}