Question

In my project AppDelegate file, I have an int declared called correctAnswersCountR1. So in the app they take a small quiz and that variable keeps track of how many correct answers they got. Now somewhere else in the project I use this variable like so:

int r1score=appDelegate.correctAnswersCountR1;

The problem is that apparently if I exit the app and come back, the value isn’t remembered, and is set back to its default value. How can I store this number so that it is remembered if the user closes the app and comes back?

Answer 1

You can use NSUserDefaults to store your value:

**Saving**
//Do this right before the app exits
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

// saving an NSInteger
[prefs setInteger:42 forKey:@"integerKey"];

// This is suggested to synch prefs, but is not needed
[prefs synchronize];

**Retrieving**
//Do this when your app is loaded again
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

// getting an NSInteger
NSInteger myInt = [prefs integerForKey:@"integerKey"];