如何在Swift中自定义UINavigationItem标题颜色

Question

我从现在起就有一个自定义视图控制器，我试图添加一个导航栏。这是我使用的代码。

let window = UIApplication.shared.windows.filter {$0.isKeyWindow}.first
let startingYPos = window?.windowScene?.statusBarManager?.statusBarFrame.height ?? 0

let navBar = UINavigationBar(frame: CGRect(x: 0, y: startingYPos, width: self.view.bounds.width, height: 44))
navBar.barTintColor = UIColor(named: "backgroundColor")
navBar.isTranslucent = false
navBar.tintColor = UIColor.white
let navItem = UINavigationItem(title: "App Name")

let backButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.cancel, target: nil, action: #selector(cancelAction))
navItem.leftBarButtonItem = backButton
navBar.setItems([navItem], animated: true)

self.view.addSubview(navBar)

问题是，有没有办法改变标题的颜色？当前默认情况下为黑色。

Answer 1

var label = UILabel()
label.text = "Text"
label.textColor = .red

navigationItem.leftBarButtonItem = UIBarButtonItem(customView: label)

使用UIBarButtonItem(customView: )功能并用所需的颜色设置UILabel。

或

如果您不想customView初始化，则可以如下设置textAttributes为UINavigationBar。

navigationController?.navigationBar.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.yourColor]

Answer 2

只需设置titleTextAttributes将解决您的问题：

let window = UIApplication.shared.windows.filter {$0.isKeyWindow}.first
let startingYPos = window?.windowScene?.statusBarManager?.statusBarFrame.height ?? 0
let navTintColor: UIColor = .white

let navItem = UINavigationItem(title: "App Name")
navItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action: #selector(cancelAction))

let navBar = UINavigationBar(frame: CGRect(x: 0, y: startingYPos, width: view.bounds.width, height: 44))
navBar.barTintColor = UIColor(named: "backgroundColor")
navBar.isTranslucent = false
navBar.tintColor = navTintColor
navBar.titleTextAttributes = [.foregroundColor: navTintColor]
navBar.setItems([navItem], animated: true)

view.addSubview(navBar)