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在AppDelegate中设置初始视图控制器 - Swift

ios
174

我想从appdelegate设置初始的视图控制器。我找到了一个非常好的答案，但是它是用Objective C编写的，我在Swift中尝试实现同样的内容时遇到了困难。

使用故事板编程设置初始视图控制器

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];

    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];

    UIViewController *viewController = // determine the initial view controller here and instantiate   it with [storyboard instantiateViewControllerWithIdentifier:<storyboard id>];

    self.window.rootViewController = viewController;
    [self.window makeKeyAndVisible];

    return YES;
}

有人能帮忙吗？

我想让初始视图控制器依赖于某些条件，使用条件语句来实现。

这可能是一个重复的问题：https://dev59.com/8Wkv5IYBdhLWcg3wsCpO#14926009 - mfaani
25个回答
1
从应用程序委托打开带有SWRevealViewController的视图控制器。
 self.window = UIWindow(frame: UIScreen.main.bounds)
 let storyboard = UIStoryboard(name: "StoryboardName", bundle: nil)
 let swrevealviewcontroller:SWRevealViewController = storyboard.instantiateInitialViewController() as! SWRevealViewController 
 self.window?.rootViewController = swrevealviewcontroller
 self.window?.makeKeyAndVisible()
1
I worked out a solution on Xcode 6.4 in swift. 

// I saved the credentials on a click event to phone memory

    @IBAction func gotobidderpage(sender: AnyObject) {
 if (usernamestring == "bidder" && passwordstring == "day303")
        {
            rolltype = "1"

NSUserDefaults.standardUserDefaults().setObject(usernamestring, forKey: "username")
NSUserDefaults.standardUserDefaults().setObject(passwordstring, forKey: "password")
NSUserDefaults.standardUserDefaults().setObject(rolltype, forKey: "roll")


            self.performSegueWithIdentifier("seguetobidderpage", sender: self)
}


// Retained saved credentials in app delegate.swift and performed navigation after condition check


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

let usernamestring = NSUserDefaults.standardUserDefaults().stringForKey("username")
let passwordstring = NSUserDefaults.standardUserDefaults().stringForKey("password")
let rolltypestring = NSUserDefaults.standardUserDefaults().stringForKey("roll")

        if (usernamestring == "bidder" && passwordstring == "day303" && rolltypestring == "1")
        {

            // Access the storyboard and fetch an instance of the view controller
            var storyboard = UIStoryboard(name: "Main", bundle: nil)
            var viewController: BidderPage = storyboard.instantiateViewControllerWithIdentifier("bidderpageID") as! BidderPage

            // Then push that view controller onto the navigation stack
            var rootViewController = self.window!.rootViewController as! UINavigationController
            rootViewController.pushViewController(viewController, animated: true)
        }

        // Override point for customization after application launch.
        return true
    }



Hope it helps !
0
方法一： 我们还可以从info.plist文件中进行操作。

enter image description here

方法2：使用从func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {进行初始化的方式。
0
0

适用于Swift 5+


var window: UIWindow?

    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        if let windowScene = scene as? UIWindowScene {
            let window = UIWindow(windowScene: windowScene)
            let submodules = (
                home: HomeRouter.createModule(),
                search: SearchRouter.createModule(),
                exoplanets: ExoplanetsRouter.createModule()
            )
            
            let tabBarController = TabBarModuleBuilder.build(usingSubmodules: submodules)
            
            window.rootViewController = tabBarController
            self.window = window
            window.makeKeyAndVisible()
        }
    }
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