Question

I have a app that has multiple buttons that are all assigned images in the interface builder. I then change there images during the application. What i want to know how would you is to change the images back to the original image….I did it by the following code but it keeps crashing the app

- (IBAction)resetCards
{
    NSString *cardImage = [[NSString alloc] initWithFormat:@"CardBackground.png"];

    UIImage *buttonImage = [UIImage imageNamed:cardImage];

    [holdCardOne setImage:buttonImage forState:UIControlStateNormal];

    [holdCardTwo setImage:buttonImage forState:UIControlStateNormal];

    [flopCardOne setImage:buttonImage forState:UIControlStateNormal];

    [flopCardTwo setImage:buttonImage forState:UIControlStateNormal];

    [flopCardThree setImage:buttonImage forState:UIControlStateNormal];

    [turnCard setImage:buttonImage forState:UIControlStateNormal];

    [riverCard setImage:buttonImage forState:UIControlStateNormal];

    [cardImage release];
    [buttonImage release];

}

Answer 1

Don’t call [buttonImage release] — it is being autoreleased.

Usually only call release if you call alloc, copy, or retain. Always check the documentation for a message that returns an object if you are unsure, but normal Objective-C process is to return objects that autorelease.