ios 使用 swift 从应用程序委托打开视图控制器
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Opening view controller from app delegate using swift
提问by Lister
I am trying to create a push notification which determines which view to open according to information obtained from the push.
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要打开的视图。
I have managed to get the information from the push, but I am now struggling to get the view to open
我已经设法从推送中获取信息，但我现在正在努力打开视图
Looking at other stack overflow questions I have the following currently:
查看其他堆栈溢出问题，我目前有以下几点：
App Delegate Did finish loading:
App Delegate 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
}
}
Currently this is failing on the var ViewController = self... line.
目前，这在 var ViewController = self... 行上失败了。
回答by Kirit Modi
You have to set ViewController StoryBoardId property as below image.
您必须将 ViewController StoryBoardId 属性设置为下图。
open viewController using coding as below in swift
使用如下代码快速打开 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
}
For iOS 13+(based on an article by dev2qa)
Open SceneDelegate.swiftand add following
对于 iOS 13+（基于dev2qa 的文章）
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 }
}
There is an open-source navigation utilitywhich attempts to make this easier. Example
回答by Quy Bui
Swift 3:
斯威夫特 3：
This is my preferred approach when presenting a new viewController from the current viewController through the AppDelegate. This way you don't have to completely tear down your view hierarchy when handling a push notification or universal link
当通过 AppDelegate 从当前 viewController 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链接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)
}
}
回答by Arvin Sanmuga Rajah
Swift 3
斯威夫特 3
To present the view together with the navigation controller:
将视图与导航控制器一起呈现：
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)
}
回答by iDhaval
First Initialize the window
首先初始化 window
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
let storyBoard = UIStoryboard(name: "Main", bundle: nil)
For setting rootViewControllerinside AppDelegateClass
用于rootViewController在AppDelegateClass内设置
let viewController = storyBoard.instantiateViewControllerWithIdentifier("Circles") as UIViewController
self.window?.rootViewController = viewController
self.window?.makeKeyAndVisible()
回答by u5844373
There is a swift 4 version
有一个 swift 4 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}
回答by Amul4608
In Swift 3
在斯威夫特 3
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")
}
回答by Marcin Biliński
I'd say creating UIWindow each time you want to change rootViewController is bad idea. After couple changes of rootVC (using upper solution) you are gonna have many UIWindows in your app at one time.
我会说每次要更改 rootViewController 时都创建 UIWindow 是个坏主意。在对 rootVC 进行几次更改（使用上层解决方案）之后，您的应用程序中将同时拥有多个 UIWindows。
In my opinion better solution is:
在我看来，更好的解决方案是：
- Get new rootVC:
let rootVC = UIStoryboard(name: "StoryboardName", bundle: nil).instantiateViewControllerWithIdentifier("newRootVCIdentifier") as UIViewController - Set frame for new rootVC from UIScreen's bounds:
rootVC.view.frame = UIScreen.mainScreen().bounds - Set new root controller for current window (here with animation):
UIView.transitionWithView(self.window!, duration: 0.5, options: .TransitionCrossDissolve, animations: { self.window!.rootViewController = rootVC }, completion: nil)
- 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 - 为当前窗口设置新的根控制器（这里有动画）：
UIView.transitionWithView(self.window!, duration: 0.5, options: .TransitionCrossDissolve, animations: { self.window!.rootViewController = rootVC }, completion: nil)
Done!
完毕！
You don't need method window?.makeKeyAndVisible(), cause this solution works on current app window.
您不需要 method window?.makeKeyAndVisible()，因为此解决方案适用于当前应用程序窗口。
回答by Anil
Swift 3 SWRevealViewController
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()
回答by harsh shah
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)
回答by Sachin Rasane
SWIFT 4
快速 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)
