如何在MFMailComposeViewController中将状态栏更改为白色？

Question

Pic显示在下方。

在我的应用中，已添加电子邮件提示，但状态栏现在为黑色，如何将其更改为白色风格？

if MFMailComposeViewController.canSendMail() {
            let composeMail = MFMailComposeViewController()
            composeMail.mailComposeDelegate = self
            //  configs
            composeMail.setToRecipients(["kylebing@163.com"])
            composeMail.setSubject("【饥荒口袋】反馈")
            composeMail.setMessageBody("问题页面：\n\n\n\n建议：\n", isHTML: false)
            composeMail.navigationBar.tintColor = UIColor.white.withAlphaComponent(0.85) // Mail VC's Button Color
            // TODO: - Change status bar color
            //  show it
            self.present(composeMail, animated: true, completion: nil)
}

Answer 1

在呈现邮件编辑器

之前调用此方法

func setStatusBarBackgroundColor(color: UIColor) {

        guard let statusBar = UIApplication.shared.value(forKeyPath: "statusBarWindow.statusBar") as? UIView else { return }

        statusBar.backgroundColor = color
    }

Answer 2

尝试在完成处理程序中设置statusBarStyle present邮件控制器，如此

self.present(composeMail, animated: true, completion:{ () in
     UIApplication.shared.statusBarStyle = UIStatusBarStyle.lightContent
})

希望它会奏效。

Answer 3

在viewWillAppear中：

override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
UIApplication.sharedApplication().statusBarStyle = UIStatusBarStyle.LightContent
self.navigationController.navigationBar.translucent = false
self.navigationController.navigationBar.opaque = false
self.navigationController.navigationBar.barTintColor = UIColor.blueColor()}

要更改整个应用程序的状态栏颜色，请在app delegate中编写以下代码行

UIApplication.sharedApplication().statusBarStyle = UIStatusBarStyle.LightContent

进入您的app代理人didFinishLoading。