How to open a ViewController before application starts in iOS - ios

Question

I am working in iOS 5,and before loading my application,I want to open a another view controller,where the user should enter some data,for eg.password and when the password matches ,application will be opened,I am not getting how to do this..I tried some code ,which I have written below
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
if(somecondition)
{
ViewController *View =[[ViewController alloc]initWithNibName:#"ViewController" bundle:nil];
[_window addSubview:View.view];
}
return YES;
}
But I dont know whether it is a right way,so friends,please help me out..
Regards
Ranjit

Answer 1

You should use
[self.window setRootViewController:yourViewController]
instead of addSubview to your window.
BTW, searching before asking is a good habit. ;)
If you want to show a view like the loginView or loadingView, you can set it as your rootViewController, when did loaded, you can reset your rootViewController.
Note, in your ProjectAppDelegate.m, you can get window
by self.window, and in other child view controller's, you'll need
[[[UIApplication sharedApplication] delegate] window]
to get your main window.
Another simple way to meet your requirement is that you can just present a modalView before showing your app. Dismiss it after done and then start your app.
You can get more suggestion HERE.
BTW, I'm sorry I didn't get your comments' notification when you are write at other users comment area a few days ago. :( You should add # before the user's name when you comment at somewhere else.

Answer 2

You can create some bool variable for checking is this a first start or another. The best place to store this bool is NSUserDefaults. Well, if this is a first start then show your LoginViewController, if not - execute regular code:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UIViewController *startVC = nil;
if (isFirstLaunch){
startVC = [[[LoginViewController alloc] initWithNibName:#"LoginView" bundle:nil] autorelease];
}
else{
startVC = [[[WorkspaceViewController alloc] initWithNibName:#"WorkspaceView" bundle:nil] autorelease];
}
navController = [[UINavigationController alloc] initWithRootViewController:startVC];
[self.window makeKeyAndVisible];
[self.window addSubview:navController.view];
return YES;
}