Swift iOS7故事板-自行启动主场景

Question

I want to control which scenes are visible myself from A to Z if possible.

I am new to iOS, but decided to go with using storyboard because it seems to be the direction things are heading.

From my own perspective, I am going to view it as a tool to design multiple scenes in one place, but I wan to control transiions in my own code. (I am porting from another language and tool that already manages and tracks logic flow itself)

That leads me to my question - I would prefer to load/choose my first/primary scene myself upon startup and "launch" it myself. How do I best do so?

Answer 1

If you want to make any view controller to show at first then just click your view controller in storyboardand click on is initial view controller

From Code (In AppDelegate)

Swift

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    self.window = UIWindow(frame: UIScreen.mainScreen().bounds)

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

    var initialViewController = storyboard.instantiateViewControllerWithIdentifier("LoginSignupVC") as! UIViewController

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

    return true
}

Objective C

   - (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;
}

Answer 2

Yes you could do that. For each storyboard you have an initial view controller and each view controller in storyboard has an unique identifier. Thus while creating object of view controller in the code you can just specify identifier of the view controller which you want to create.

First scene to be visible after splash screen is root view controller, which also you can create programatically and can be loaded from storyboard using identifier for that view controller. You can also load from storyboard without using any identifier, but in that case it would load initial view controller.

You can set identifier for view controller like above in storyboard.