UIPageViewController 更改导航栏后退按钮标题

Question

这是我的完整代码。

在这里，当我在页面视图控制器的视图控制器中单击按钮时，它将导航到下一个视图（最终视图控制器）。现在我想更改导航栏后退按钮。

当我单击 ViewController 中的按钮时，如上图所示 [View controller 将加载到 PageViewController] 它将导航到 FinalViewController

我的导航栏标题代码ViewController:

@IBAction func btn(_ sender: Any) {
    print("ViewController one")
    print(variable)

    let storyboard = self.storyboard?.instantiateViewController(withIdentifier: "FVC")
    let backItem = UIBarButtonItem()
    backItem.title = "Final VC"
    //        self.navigationItem.backBarButtonItem = backItem

    (UIApplication.shared.keyWindow?.rootViewController as? UINavigationController)?.self.navigationBar.backItem?.backBarButtonItem = backItem

    (UIApplication.shared.keyWindow?.rootViewController as? UINavigationController)?.pushViewController(storyboard!, animated: true)


}

但是这段代码不起作用

Answer 1

后退按钮属于前一个视图控制器，而不是当前显示在屏幕上的视图控制器。你可以使用委托或 segue 见

Answer 2

这个答案工作正常...

let storyboard = self.storyboard?.instantiateViewController(withIdentifier: "FVC")
let backButton = UIBarButtonItem()
backButton.title = "name"
(UIApplication.shared.keyWindow?.rootViewController as? UINavigationController)?.self.navigationBar.topItem?.backBarButtonItem = backButton
(UIApplication.shared.keyWindow?.rootViewController as? UINavigationController)?.pushViewController(storyboard!, animated: true)

UIPageViewController 更改导航栏后退按钮标题

UIPageViewController change navigation bar back button title

ios

swift

xcode

uinavigationcontroller

uipageviewcontroller