Show Tutorial View on first time only [duplicate] - ios

Question

This question already has answers here:
Show screen on first launch only in iOS
(8 answers)
Closed 5 years ago.
I'm trying to create an tutorial screen that displays only during the first opening of an app. i know i should use user defaults but how and where ? in method viewDidLoad or on app delegate class ?

Answer 1

Try this one
- (BOOL)isAppAlreadyLaunchedOnce {
BOOL isRememberMe = [[NSUserDefaults standardUserDefaults]boolForKey:#"isAppAlreadyLaunchedOnce"];
if (isRememberMe) {
return YES;
}
else{
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:#"isAppAlreadyLaunchedOnce"];
return NO;
}
}

Answer 2

Store the status whether the Tutorial View is displayed or not in NSUserDefaults.
If you want to decide at startup to show or not show the Tutorial View you should do it in App Delegate didFinishLaunchingWithOptions
if(![[NSUserDefaults standardUserDefaults] boolForKey:#"shouldShowTutorial"])
//show tutorial
}
else{
//don't show tutorial
}
On the first time when the Tutorial View has been displayed set a flag in NSUserDefaults.
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:#"shouldShowTutorial"];

Answer 3

#Maddy has given correct answer but let me just clarify one thing why we will not use viewDidLoad?
Why we are using didFinishLaunch
in short:
viewDidLoad
System has already decided which View to load when application launches .By default it's the "Main" storyboard's initial view controller
didFinishLaunch
System has done all tasks to show your app but has not decided which view to load. Thats why you can control here to show your tutorial screen first. :)