iOS14 navigationItem.largeTitleDisplayMode =.始终不起作用 [英] iOS14 navigationItem.largeTitleDisplayMode = .always not work

问题描述

我有一个ViewController和DetailViewController，在ViewController的ViewDidLoad中，我设置了以下代码，目的是使ViewController始终使用大标题

I have a ViewController and a DetailViewController, in the ViewDidLoad of the ViewController I set the following code, the purpose is to make the ViewController always use the large title

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

在DetailViewController的ViewDidLoad中设置以下代码，目的是使DetailViewController不使用大标题

In the ViewDidLoad of the DetailViewController I set the following code, the purpose is to make the DetailViewController not use the large title

navigationItem.largeTitleDisplayMode = .never

当我从DetailViewController返回到ViewController时，将显示小标题，而不是ViewController中的大标题.此代码在iOS12和iOS13中正确.如何使ViewController始终在iOS14上显示大标题?

When I return from DetailViewController to ViewController, the small title is displayed instead of the large title in ViewController. This code is correct in iOS12 and iOS13. How to make the ViewController always display the large title on iOS14?

当前在App Store中使用Xcode12

Currently using Xcode12 from the App Store

推荐答案

使用我的扩展名:

extension UIViewController {
func configureNavigationBar(largeTitleColor: UIColor, backgoundColor: UIColor, tintColor: UIColor, title: String, preferredLargeTitle: Bool) {
if #available(iOS 13.0, *) {
    let navBarAppearance = UINavigationBarAppearance()
    navBarAppearance.configureWithOpaqueBackground()
    navBarAppearance.largeTitleTextAttributes = [.foregroundColor: largeTitleColor]
    navBarAppearance.titleTextAttributes = [.foregroundColor: largeTitleColor]
    navBarAppearance.backgroundColor = backgoundColor

    navigationController?.navigationBar.standardAppearance = navBarAppearance
    navigationController?.navigationBar.compactAppearance = navBarAppearance
    navigationController?.navigationBar.scrollEdgeAppearance = navBarAppearance

    navigationController?.navigationBar.prefersLargeTitles = preferredLargeTitle
    navigationController?.navigationBar.isTranslucent = false
    navigationController?.navigationBar.tintColor = tintColor
    navigationItem.title = title

} else {
    // Fallback on earlier versions
    navigationController?.navigationBar.barTintColor = backgoundColor
    navigationController?.navigationBar.tintColor = tintColor
    navigationController?.navigationBar.isTranslucent = false
    navigationItem.title = title
  }
 }
}

在viewWillAppear中设置导航栏:

set your navigation bar in viewWillAppear:

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    configureNavigationBar(largeTitleColor: .white, backgoundColor: .yourColor, tintColor: .white, title: "YourTitle", preferredLargeTitle: true)
}

现在校准显示详细控制器的功能:

now cal the function that present your detail controller:

@objc func DetailController(){
    let controller = DetailViewController()
    controller.navigationItem.largeTitleDisplayMode = .never
    navigationController?.pushViewController(controller, animated: true)
}

这是结果:

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