接收錯誤：類型的UIViewController「的價值還沒有成員「openViewControllerBasedOnIdentifier」

-1

我用我的AppDelegate以下彈出警報用戶在收到推送：接收錯誤：類型的UIViewController「的價值還沒有成員「openViewControllerBasedOnIdentifier」

let topWindow = UIWindow(frame: UIScreen.main.bounds) 
    topWindow.rootViewController = UIViewController() 
    topWindow.windowLevel = UIWindowLevelAlert + 1 
    let alert = UIAlertController(title: "message", message: "message", preferredStyle: .alert) 
    let yesButton = UIAlertAction(title: "OK", style: .default, handler: {(_ action: UIAlertAction) -> Void in 
     print("you pressed Yes, please button") 
     topWindow.isHidden = true 
     topWindow.rootViewController?.openViewControllerBasedOnIdentifier("consumerProfile") 
    }) 
    let noButton = UIAlertAction(title: "CANCEL", style: .default, handler: {(_ action: UIAlertAction) -> Void in 
     print("you pressed No, thanks button") 
     topWindow.isHidden = true 
    }) 
    alert.addAction(yesButton) 
    alert.addAction(noButton) 

    topWindow.makeKeyAndVisible() 
    topWindow.rootViewController?.present(alert, animated: true, completion: { _ in })

我的問題是：

topWindow.rootViewController?.openViewControllerBasedOnIdentifier("consumerProfile")

功能openViewControllerBasedOnIdentifier僅適用於基於名爲BaseViewController這樣一個特定的UIViewController類的意見存在，我收到以下錯誤：

Value of type 'UIViewController' has no member 'openViewControllerBasedOnIdentifier'

來源

2017-09-04 Johny D Good

你有什麼問題？您無法提供來自AppDelegate的提醒或您發佈的錯誤？ –

你只需將你的'rootViewController'設置爲一個空的'UIViewController'。你如何期待能夠在這個'UIViewController'上調用你自定義的'BaseViewController'的方法？ – rmaddy

你見過這個：https://stackoverflow.com/questions/30592521/opening-view-controller-from-app-delegate-using-swift –

只要把你的自定義類用作RootViewController的

let topWindow = UIWindow(frame: UIScreen.main.bounds) 
let topViewController = BaseViewController() 
topWindow.rootViewController = topViewController 
topWindow.windowLevel = UIWindowLevelAlert + 1 
let alert = UIAlertController(title: "message", message: "message", preferredStyle: .alert) 
let yesButton = UIAlertAction(title: "OK", style: .default, handler: {(_ action: UIAlertAction) -> Void in 
    print("you pressed Yes, please button") 
    topWindow.isHidden = true 
    topViewController.openViewControllerBasedOnIdentifier("consumerProfile") 
}) 
let noButton = UIAlertAction(title: "CANCEL", style: .default, handler: {(_ action: UIAlertAction) -> Void in 
    print("you pressed No, thanks button") 
    topWindow.isHidden = true 
}) 
alert.addAction(yesButton) 
alert.addAction(noButton) 

topWindow.makeKeyAndVisible() 
topWindow.rootViewController?.present(alert, animated: true, completion: { _ in })

UPDATE

因爲你的ViewController沒有init()試試這個代碼：

let topWindow = UIWindow(frame: UIScreen.main.bounds) 
let storyboard = UIStoryboard(name: "Main", bundle: nil) // Name of storyboard should be same as your 
let topViewController = storyboard.instantiateViewController(withIdentifier: identifier) as? BaseViewController // be sure that `identifier` of BaseViewController is same as in storyboard 
topWindow.rootViewController = topViewController 
topWindow.windowLevel = UIWindowLevelAlert + 1 
let alert = UIAlertController(title: "message", message: "message", preferredStyle: .alert) 
let yesButton = UIAlertAction(title: "OK", style: .default, handler: {(_ action: UIAlertAction) -> Void in 
    print("you pressed Yes, please button") 
    topWindow.isHidden = true 
    topViewController.openViewControllerBasedOnIdentifier("consumerProfile") 
}) 
let noButton = UIAlertAction(title: "CANCEL", style: .default, handler: {(_ action: UIAlertAction) -> Void in 
    print("you pressed No, thanks button") 
    topWindow.isHidden = true 
}) 
alert.addAction(yesButton) 
alert.addAction(noButton) 

topWindow.makeKeyAndVisible() 
topWindow.rootViewController?.present(alert, animated: true, completion: { _ in })

更新2

還有就是你identifier = storyboard ID

來源

2017-09-04 14:55:51

這是如何改變'rootViewController'？ – rmaddy

@maddy忘了更改topWindow.rootViewController = topViewController –

@YerkebulanAbildin無法實例化視圖控制器，如果我想要菜單結構，則需要使用openViewControllerBasedOnIdentifier方法。當我嘗試頂部的應用程序崩潰與「致命錯誤：意外地發現零，而解包可選值」 –

接收錯誤：類型的UIViewController「的價值還沒有成員「openViewControllerBasedOnIdentifier」

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