SwiftUI设置状态栏样式 [英] SwiftUI setting status bar style

问题描述

我一直试图在我的SwiftUI应用中将状态栏设置为浅色文本，因为它具有深色背景.

I have been attempting to set the statusbar in my SwiftUI app to light text as it has a dark background.

我在多个站点上找到了该解决方案，但无法使其正常工作.

I found this solution on several sites but cannot get it to work.

HostingController.swift

HostingController.swift

import Foundation
import UIKit
import SwiftUI

class HostingController : UIHostingController {
    override var preferredStatusBarStyle: UIStatusBarStyle {
    return .lightContent
    }
}

这将在类声明行Reference to generic type 'UIHostingController' requires arguments in <...>上返回错误，并建议使用Insert '<<#Content: View#>>'修复.应用上述修复程序会导致错误Use of undeclared type '<#Content: View#>'

This returns an error on the class declaration line Reference to generic type 'UIHostingController' requires arguments in <...> with a suggested fix of Insert '<<#Content: View#>>'. Applying said fix results in the error Use of undeclared type '<#Content: View#>'

然后您将在SceneDelegate.swift文件中更改window.rootViewController.

You are then meant to change the window.rootViewController in the SceneDelegate.swift file.

SceneDelegate.swift

SceneDelegate.swift

...

// Create the SwiftUI view that provides the window contents.
        let contentView = Login()

        // Use a UIHostingController as window root view controller.
        if let windowScene = scene as? UIWindowScene {
            let window = UIWindow(windowScene: windowScene)
            window.rootViewController = HostingController(rootView: contentView)
            self.window = window
            window.makeKeyAndVisible()
        }

...

这会在window.rootViewController行Argument passed to call that takes no arguments

有人有什么想法吗?似乎很麻烦，只是设置状态栏颜色，我想这是一个相当普遍的要求.

Anyone got any ideas? Seems like a lot of bother just to set the status bar colour which I imagine would be a fairly common requirement.

推荐答案

您的HostingController需要具体类型的rootView:

Your HostingController needs a concrete type of the rootView:

class HostingViewController: UIHostingController<AnyView> {

    @objc override var preferredStatusBarStyle: UIStatusBarStyle {
        return .lightContent
    }
}

然后在func scene(_ scene: UIScene, willConnectTo...中将其用作rootViewController:

Then use it in func scene(_ scene: UIScene, willConnectTo... as the rootViewController:

let contentView = ContentView()
    if let windowScene = scene as? UIWindowScene {
        let window = UIWindow(windowScene: windowScene)

        window.rootViewController = HostingViewController(rootView: AnyView(contentView.environmentObject(SessionStore())))
        self.window = window
        window.makeKeyAndVisible()
    }

不幸的是，您不会在画布上看到任何差异，但是可以在模拟器上进行尝试.

You won't see any difference in canvas unfortunately, but try it on a simulator.

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