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The UILabel (I will assume you use it) takes a NString to be displayed. You need to add the numbers first and then make the string that can be added to the label.
ReplyDeletemyLabel.text = [NSString stringWithFormat:@"%d", originalValue + diff];
I'm not sure what exactly you want but here's my guess:
ReplyDeleteYou have a variable that keeps a score on an UILabel object, and you need to add or subtract this value depending on some type of action.
This is how I would do it:
@interface Scoreboard : NSObject {
IBOutlet UILabel *label;
int counter;
}
- (IBAction)addToCounter;
- (IBAction)subtractToCounter;
- (void)updateLabel;
@end
@implementation Scoreboard
- (IBAction)addToCounter {
counter++;
[self updateLabel];
}
- (IBAction)subtractToCounter {
counter--;
[self updateLabel];
}
- (void)updateLabel {
label.text = [NSString stringWithFormat:@"Score = %i", counter];
}
@end
I just wrote this from memory but I don't think there is any errors. I hope that helps you. Good luck!