使用 swift 从应用程序委托打开视图控制器

Question

我正在尝试创建一个推送通知，它根据从推送中获得的信息确定打开哪个视图。

我已经设法从推送中获取信息，但我现在正在努力让视图打开

查看其他堆栈溢出问题，我目前有以下问题：

App Delegate 是否完成加载：

     //Extract the notification data
    if let notificationPayload = launchOptions?[UIApplicationLaunchOptionsRemoteNotificationKey] as? NSDictionary {
        // Get which page to open
        let viewload = notificationPayload["view"] as? NSString
        let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
        //Load correct view
        if viewload == "circles" {

            var viewController = self.window?.rootViewController?.storyboard?.instantiateViewControllerWithIdentifier("Circles") as! UIViewController
            self.window?.rootViewController = viewController

                        }
    }

目前这在 var ViewController = self... 行上失败。

Answer 1

您必须设置 ViewController StoryBoardId 属性如下图。

使用 swift

中的编码打开 viewController

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

         let mainStoryboardIpad : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
         let initialViewControlleripad : UIViewController = mainStoryboardIpad.instantiateViewControllerWithIdentifier("Circles") as UIViewController
         self.window = UIWindow(frame: UIScreen.main.bounds)
         self.window?.rootViewController = initialViewControlleripad
         self.window?.makeKeyAndVisible()

         return true
    }

对于iOS13+（基于an article by dev2qa）
打开 SceneDelegate.swift 并添加以下内容

func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {

    // If this scene's self.window is nil then set a new UIWindow object to it.
    self.window = self.window ?? UIWindow()

    // Set this scene's window's background color.
    self.window!.backgroundColor = UIColor.red

    // Create a ViewController object and set it as the scene's window's root view controller.
    self.window!.rootViewController = ViewController()

    // Make this scene's window be visible.
    self.window!.makeKeyAndVisible()

    guard scene is UIWindowScene else { return }
}

有开源的navigation utility which attempts to make this easier. Example

Answer 2

首先初始化 window

self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
let storyBoard = UIStoryboard(name: "Main", bundle: nil)

用于设置 rootViewController inside AppDelegate Class

let viewController = storyBoard.instantiateViewControllerWithIdentifier("Circles") as UIViewController
self.window?.rootViewController = viewController
self.window?.makeKeyAndVisible()

Answer 3

我想说的是，每次您想更改 rootViewController 时都创建 UIWindow 是个坏主意。在对 rootVC 进行几次更改（使用上面的解决方案）后，您的应用程序中将同时拥有多个 UIWindows。

在我看来更好的解决方案是：

获取新的 rootVC：let rootVC = UIStoryboard(name: "StoryboardName", bundle: nil).instantiateViewControllerWithIdentifier("newRootVCIdentifier") as UIViewController
从 UIScreen 的边界为新的 rootVC 设置框架：rootVC.view.frame = UIScreen.mainScreen().bounds
为当前 window 设置新的根控制器（这里有动画）：UIView.transitionWithView(self.window!, duration: 0.5, options: .TransitionCrossDissolve, animations: { self.window!.rootViewController = rootVC }, completion: nil)

完成！

您不需要方法 window?.makeKeyAndVisible()，因为此解决方案适用于当前应用 window。

Answer 4

Swift 3:

当通过 AppDelegate 从当前 viewController 中呈现新的 viewController 时，这是我的首选方法。这样你就不必在处理推送通知或通用 link

时完全拆除你的视图层次结构

if let controller = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "someController") as? SomeController {
    if let window = self.window, let rootViewController = window.rootViewController {
        var currentController = rootViewController
        while let presentedController = currentController.presentedViewController {
            currentController = presentedController
        }
        currentController.present(controller, animated: true, completion: nil)
    }
}

Answer 5

Swift 3

与导航控制器一起呈现视图：

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let viewController = storyboard.instantiateViewController(withIdentifier :"InboxViewController") as! InboxViewController
let navController = UINavigationController.init(rootViewController: viewController)

   if let window = self.window, let rootViewController = window.rootViewController {
       var currentController = rootViewController
       while let presentedController = currentController.presentedViewController {
           currentController = presentedController
        }
           currentController.present(navController, animated: true, completion: nil)
   }

Answer 6

Swift 3 SWRevealViewController

    self.window = UIWindow(frame: UIScreen.main.bounds)
    let storyBoard = UIStoryboard(name: "Main", bundle: nil)

    let viewController = storyBoard.instantiateViewController(withIdentifier: "SWRevealViewController") as! SWRevealViewController
    self.window?.rootViewController = viewController
    self.window?.makeKeyAndVisible()

Answer 7

在Swift3

        let mainStoryboard : UIStoryboard = UIStoryboard(name: StorybordName, bundle: nil)
        let initialViewControlleripad : UIViewController = mainStoryboard.instantiateViewController(withIdentifier: identifierName) as UIViewController
        if let navigationController = self.window?.rootViewController as? UINavigationController
        {
            navigationController.pushViewController(initialViewControlleripad, animated: animation)
        }
        else
        {
            print("Navigation Controller not Found")
        }

Answer 8

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

    let destinationViewController = storyboard.instantiateViewController(withIdentifier: "LandVC") as! LandingPageVC

    destinationViewController.webpageURL = NotificationAdvertisement._htmlpackagePath
    destinationViewController.adID = NotificationAdvertisement._adID
    destinationViewController.toneID = NotificationAdvertisement.toneID

    let navigationController = self.window?.rootViewController as! UIViewController

    navigationController.showDetailViewController(destinationViewController, sender: Any?.self)

Answer 9

有一个swift4版本

func application(_ application: UIApplication, 
didFinishLaunchingWithOptions launchOptions: 
[UIApplicationLaunchOptionsKey: Any]?) -> Bool {
let mainStoryboardIpad : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let initialViewControlleripad : UIViewController = mainStoryboardIpad.instantiateViewController(withIdentifier: "Circles") as UIViewController
            self.window = UIWindow(frame: UIScreen.main.bounds)
            self.window?.rootViewController = initialViewControlleripad
            self.window?.makeKeyAndVisible()

return true}

Answer 10

SWIFT 4

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

    let destinationViewController = storyboard.instantiateViewController(withIdentifier: "LandVC") as! LandingPageVC

    destinationViewController.webpageURL = NotificationAdvertisement._htmlpackagePath
    destinationViewController.adID = NotificationAdvertisement._adID
    destinationViewController.toneID = NotificationAdvertisement.toneID

    let navigationController = self.window?.rootViewController as! UIViewController

    navigationController.showDetailViewController(destinationViewController, sender: Any?.self)

Answer 11

func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
    guard let windowScene = (scene as? UIWindowScene) else { return }
    self.window = UIWindow(windowScene: windowScene)

    let mainStoryboard : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
    let vc : UIViewController = mainStoryboard.instantiateViewController(withIdentifier: "LoginViewController")
    let rootNC = UINavigationController(rootViewController: vc)
    self.window?.rootViewController = rootNC
    self.window?.makeKeyAndVisible()

}

使用 swift 从应用程序委托打开视图控制器

Opening view controller from app delegate using swift

uiviewcontroller

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有一个swift4版本