為什么當我點擊推送通知並快速移動ViewController時狀態欄消失

Question

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {

    /* */
    self.window = UIWindow(frame: UIScreen.main.bounds)
    self.window?.rootViewController = UIViewController()
    self.window?.windowLevel = UIWindowLevelAlert + 1
    self.window?.makeKeyAndVisible()

    /*

    fetch and add push notification data

     */
    goAnotherVC()
}

func goAnotherVC() {
    if (application.applicationState == UIApplicationState.active) {
        /* active stage is working */ 
    } else if (application.applicationState == UIApplicationState.inactive || application.applicationState == UIApplicationState.background) {
        if (type == "1" || type == "2") {
            let storyboard: UIStoryboard = UIStoryboard(name: "MyAppointments", bundle: nil)
            let apptVC = storyboard.instantiateViewController(withIdentifier: "NotificationDetailViewController") as! NotificationDetailViewController
            let navigationController = UINavigationController.init(rootViewController: apptVC)
            self.window?.rootViewController = navigationController
            self.window?.makeKeyAndVisible()
        } else if (type == "3") {
            let storyboard: UIStoryboard = UIStoryboard(name: "MyAppointments", bundle: nil)
            let apptVC = storyboard.instantiateViewController(withIdentifier: "NotificationDetailViewController") as! NotificationDetailViewController
            let navigationController = UINavigationController.init(rootViewController: apptVC)
            self.window?.rootViewController = navigationController
            self.window?.makeKeyAndVisible()
        } else if (type == "4") {
            let storyboard: UIStoryboard = UIStoryboard(name: "Enquiry", bundle: nil)
            let enqVC = storyboard.instantiateViewController(withIdentifier: "EnquiryDetailViewController") as! EnquiryDetailViewController
            let navigationController = UINavigationController.init(rootViewController: enqVC)
            self.window?.rootViewController = navigationController
            self.window?.makeKeyAndVisible()
        }
    }
}

上面的代碼是獲取推送通知數據，並在用戶點擊時發送到相關的View Controller。 但是我發現打開View Controller時缺少狀態欄。 謝謝，請讓我知道如何解決它。

Answer 1

乍看之下（並且沒有實際驗證代碼），我懷疑罪魁禍首是：

self.window = UIWindow(frame: UIScreen.main.bounds)

您正在設置窗口以覆蓋視圖的整個邊界。 要查看是否是問題所在，只需將該行更改為以下內容：

var rect = UIScreen.main.bounds
rect.origin.y += 20
self.window = UIWindow(frame: rect)

並查看問題是否消失。 在我的代碼中，我只是更改了窗口的頂部位置以允許使用狀態欄。