Question

I’m developing an iPhone application with latest SDK and XCode.

I’m using storyboarding and I don’t know how to open a view when user runs the app at first time.

I will check if there is user preferences saved, and, if there isn’t, I will open settings view:

prefs = [NSUserDefaults standardUserDefaults];

if ([prefs stringForKey:APP_LANGUAGE_KEY] == nil)
{
    // Open SettingsViewController;
}
else
{
    // Continue usually.
}

This is my storyboard:

How can I do it?

Answer 1

You almost got it right. Just make sure you set a key at the first launch.

NSString *key = @"AppWasLaunchedInThePast";
BOOL firstLaunch = ![[NSUserDefaults standardUserDefaults] objectForKey:key];
if (firstLaunch) {
    // First launch. Open settings.
    UIStoryboard *sb = [UIStoryboard storyboardWithName:@"FileName" bundle:nil];
    NSString *anID = @"SettingsViewController"; // or whatever you set in IB.
    SettingsViewController *vc = [sb instantiateViewControllerWithIdentifier:anID];
    // push vc to your navigation controller, or present it modally here.
} else {
    // Not first launch.
}
// Make sure we remember that the app was launched:
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:key];
[[NSUserDefaults standardUserDefaults] synchronize];