iOS14 navigationItem.largeTitleDisplayMode = .always 不工作 [英] iOS14 navigationItem.largeTitleDisplayMode = .always not work

问题描述

我有一个ViewController和一个DetailViewController，在ViewController的ViewDidLoad我设置如下代码，目的是让ViewController总是使用大标题

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中我设置如下代码，目的是让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，ViewController 中显示的是小标题而不是大标题.此代码在 iOS12 和 iOS13 中是正确的.如何让ViewController在iOS14上一直显示大标题?

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?

目前正在使用 App Store 中的 Xcode12

Currently using Xcode12 from the App Store

推荐答案

使用我的扩展:

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)
}

现在调用显示你的细节控制器的函数:

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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