I am extremely new to coding. All I did was update my Xcode software and received this error. Thank you for all of your help! This first line is where my error occured:
HighScore = [[NSUserDefaults standardUserDefaults] integerForKey:@"HighScoreSaved"];
Intro3.text = [NSString stringWithFormat:@"High Score: %i", HighScore];
I declared it here but I don't know if this is relevant
int HighScore;