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

Question

图如下所示。

在我的应用程序中，a添加了一个电子邮件提示，但是状态栏现在是黑色，如何将其更改为白色样式

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

尝试在完成处理程序中设置statusBarStyle，而present邮件控制器如下所示

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

希望它能成功。

Answer 2

在您呈现邮件编写器之前调用此方法，

func setStatusBarBackgroundColor(color: UIColor) {

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

        statusBar.backgroundColor = color
    }

Answer 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()}

以更改整个应用程序的状态栏颜色，在app委托中编写这一行代码

UIApplication.sharedApplication().statusBarStyle = UIStatusBarStyle.LightContent

进入您的应用程序委托didFinishLoading。