Iphone SDK how to save my score?

Question

i have a integer called HighScore which is connected to highscorelabel . i have made it so when the user gets a high score it puts the score they got onto the label but i would now like to know how i can save it so that when the app is opened again it will still have the high score : this is my code for detecting when a high score is made

• (void) submitScore { if (lives > HighScore){ HighScore = lives; } highscorelabel.text = [NSString stringWithFormat:@"%i" , HighScore]; }

can anyone help me please thankyou dave

Answer 1

Use NSUserDefaults for saving:

NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

[prefs setInteger:HighScore  forKey:@"HighScore "];

[prefs synchronize];

and retrieving:

HighScore  = [prefs integerForKey:@"HighScore"];

Answer 2

hi thanks for your quick responce , it all succeeds with no errors but terminates when the method is called :/ heres what i have done . am i doing it wrong ?

 - (void) submitScore {
if (lives > HighScore){
 HighScore = lives;
}
{
 NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
 [prefs setInteger:HighScore  forKey:@"HighScore "];
 [prefs synchronize];
}
{
 NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
 HighScore  = [prefs integerForKey:@"HighScore"];
}
highscorelabel.text = [NSString stringWithFormat:@"%i" , HighScore];

}

do i need to @synthesize any of my labels or anything ? thankyou.

Answer 3

the aplication freezes and in xcode it says somehting about THE_APPLICATION_HAD_TO_TERMNATE or somehting llike that ... ummm well the label responds to when i have my original code:

- (void) submitScore {
if (lives > HighScore){
 HighScore = lives;
}
highscorelabel.text = [NSString stringWithFormat:@"%i" , HighScore];

}

but i dont no really... by the way i presumed that a int is a integer because that is what my HighScore is ... in my .h i have declared it as:

int HighScore;

is this correct.

thanks again

Answer 4

i think that the space was it .

it dose not crash anymore but instead dosnt save the score for when i open up the app again or just simply change the text to the high score

i was wondering if it has anything to do with the %i part of this

highscorelabel.text = [NSString stringWithFormat:@"%i" , HighScore];

??? i have seen many different ways of which people do this but i dont know what would be right for me.

Answer 5

how do i update my label?

Answer 6

:):):) i have just done what you said by putting the load method first and it works!!!!!!!! finally my app is complete :):) i only need to restyle it now ... i cannot thank you enough i have been trying to get this part of my app working for nearly a week now and no one could explain it to me as well as you did .

thankyou again, Dave