How do you pass a variable to the UIAlertView delegate?

Question

How do you pass a variable to the UIAlertView delegate?

I have a variable that I want to use in the alert view delegate. It is only used in the functio

Answer 1

in .h before interface:

extern const char MyConstantKey;
@interface ViewController...

in .m import:

import 

in .m before implementation

const char MyConstantKey;

in .m implementation

-(void)viewDidAppear:(BOOL)animated{ //or wherever

    NSString *aString = @"This is a string";

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Testing" message:@"test is test" delegate:self cancelButtonTitle:@"Okay" otherButtonTitles:nil];

    [alert show];

    [alert release];

    objc_setAssociatedObject(alert, &MyConstantKey, aString, OBJC_ASSOCIATION_RETAIN_NONATOMIC);

 }

in .m alertview callback

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{

     NSString *associatedString = objc_getAssociatedObject(alertView, &MyConstantKey);

     NSLog(@"associated string: %@", associatedString);

}