How to launch a different viewController on the second launch - ios

Question

Here the code I have under the viewController.m
This code will run when a user selects a viewController
-(void)switchViews {
UIStoryboard *mainStory = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
UIViewController *vc = [mainStory instantiateViewControllerWithIdentifier:schoolName];
[self presentModalViewController:vc animated:YES];
NSUserDefaults *defaultViewController = [NSUserDefaults standardUserDefaults];
[defaultViewController setObject:nil forKey:#"save"];
[defaultViewController synchronize];
}
This code will run on the second time the app is launched
-(void)loadNewView {
UIStoryboard *mainStory = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
NSUserDefaults *newUserDefault = [NSUserDefaults standardUserDefaults];
NSString *newVC = [NSString stringWithFormat:#"save", schoolName];
UIViewController *newViewController = [mainStory instantiateViewControllerWithIdentifier:newVC];
[self presentModalViewController:newViewController animated:YES];
}
Keeping in mind that schoolNameis a string
How can I run [self loadNewView] under the viewDidLoad but running it on the second time the app is launched?

Answer 1

You should do something like
id value = [[NSUserDefaults standardUserDefaults] objectForKey:#"save"];
if (value) {
UIViewController *vc = [mainStory instantiateViewControllerWithIdentifier:value];
[self presentModalViewController:vc animated:YES];
} else {
// first time logic
}
in your AppDelegate or wherever you have your navigation logic. You should not have that logic in viewDidLoad.

Answer 2

-(void)viewDidLoad {
[super viewDidLoad];
NSString *launchCount = #"LaunchCount";
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
NSInteger count;
if([userDefaults objectForKey:launchCount]) {
count = [userDefaults integerForKey:launchCount];
}
else {
count = 0;
}
count++; //increment the launch count
[userDefaults setObject:[NSNumber numberWithInt:count] forKey:launchCount];
[userDefaults synchronize];
if([userDefaults integerForKey:launchCount] >= 2) {
// Do your thang
}
}

Answer 3

on ViewDidLoad function do something like this
if (![[NSUserDefaults standardUserDefaults] boolForKey:#"HasLaunchedFirst"])
{
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:#"HasLauncheFirst"];
[[NSUserDefaults standardUserDefaults] synchronize];
[self switchViews];
}
else
{
[[NSUserDefaults standardUserDefaults] setBool:No forKey:#"HasLauncheFirst"];
[[NSUserDefaults standardUserDefaults] synchronize];
[self loadNewView];
}