ios - 从 AppDelegate 调用函数并使用该函数执行 segue

Question

我正在尝试从 AppDelegate 调用一个函数，并使用该函数尝试执行转场。

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func doSegue (_ verification : Bool) {
    if verification {
        print ("Segue performed")
        LoginVC ()
        .performSegue (withIdentifier: "tosignup", sender: nil)
    }
    else { print("An error occured while login") }
}
func btnremove () {
    print ("Segue performed 1")
    loginbtn.isHidden = true doSegue (true)
}

这些是超出执行范围的错误。

Answer 1

如果您没有在 LoginVC 中的prepareForSegue 中执行任何特殊操作，您可以在 AppDelegate 中启动 Root View Controller :

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    self.window = UIWindow(frame: UIScreen.main.bounds)

    let storyboard = UIStoryboard(name: "Main", bundle: nil)

    if (verification) {
        let initialViewController = storyboard.instantiateViewController(withIdentifier: "LoginVC")

        self.window?.rootViewController = initialViewController
        self.window?.makeKeyAndVisible()
    } else {
        let initialViewController = storyboard.instantiateViewController(withIdentifier: "SignupformVC")

        self.window?.rootViewController = initialViewController
        self.window?.makeKeyAndVisible()
    }

    return true
}

您还应该为 View Controller 设置标识符。