ios - 无法使 SFSafariViewController 状态栏样式 lightContent

Question

我要求状态栏中有黑色背景的浅色内容，但是某些屏幕需要白色背景的黑色状态栏内容，因此我保留了基于 View Controller 的状态栏外观在 info.plist 中设置为 YES 以根据 View Controller 要求采用状态栏样式。

我的问题是，每当我从任何 View Controller 显示 SFSafariViewController 时，它默认采用黑色状态栏内容和白色背景，即状态栏样式每次都是 .default。

我尝试重写 SFSafariViewController 子类中的 preferredStatusBarStyle，但目前还看不到。

下面是我的代码

import UIKit
import SafariServices

extension SFSafariViewController {

    override open var preferredStatusBarStyle: UIStatusBarStyle {
        return .lightContent
    }
}

extension UINavigationController {
    open override var preferredStatusBarStyle: UIStatusBarStyle {
        return topViewController?.preferredStatusBarStyle ?? .lightContent
    }
}

class MyViewController: UIViewController, SFSafariViewControllerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
        self.navigationController?.navigationBar.barTintColor = UIColor.lightGray
    }

    override var preferredStatusBarStyle: UIStatusBarStyle {
        return .lightContent
    }

    @IBAction func presentSafari(sender: AnyObject) {

        let safari = SFSafariViewController(url: URL(string: "https://www.google.com/")!)
        safari.delegate = self
        present(safari, animated: true) {
        }
    }

    // MARK: - SFSafariViewControllerDelegate
    func safariViewControllerDidFinish(_ controller: SFSafariViewController) {
        dismiss(animated: true, completion: nil)
    }
}

Answer 1

设置modalPresentationCapturesStatusBarAppearance从呈现 View Controller 接管状态栏外观的控制。

@IBAction func presentSafari(sender: AnyObject) {

    let safari = SFSafariViewController(url: URL(string: "https://www.google.com/")!)
    safari.delegate = self
    safari.modalPresentationCapturesStatusBarAppearance = true
    if #available(iOS 10.0, *) {
        safari.preferredBarTintColor = .yellow
    } else {
        // Fallback on earlier versions
        safari.view.tintColor = .yellow
    }
    present(safari, animated: true) {
    }
}

extension SFSafariViewController {
    override open var preferredStatusBarStyle: UIStatusBarStyle {
        return .lightContent
    }
}

When you present a view controller by calling the present(_:animated:completion:) method, status bar appearance control is transferred from the presenting to the presented view controller only if the presented controller's modalPresentationStyle value is UIModalPresentationStyle.fullScreen. By setting this property to true, you specify the presented view controller controls status bar appearance, even though presented non-fullscreen.

输出:截图