Question

Good Morning ,

I have been trying to make a dynamic message box on a UIAlertView but i havent been managing , im sending data from one class to another using the command :

   message = @"Now Starting Download";
   transition.message = self.message;
    NSLog(@"%@",message);

Over here message shows @"Now Starting Download"
When i go over to the other class (transition class) , i implement using this code :

-(id) showmessage:(NSString *)trans
{

    NSLog(@"%@ This is in the transition class",message);

    return trans;
}

and message now is empty :@

Any help would be appreciated

-Chris

Answer 1

This:

-(id) showmessage:(NSString *)trans
{

    NSLog(@"%@ This is in the transition class",message);

    return trans;
}

makes no sense. First off, if you’re only using the class to NSLog an NSString*, why not just return an NSString*? Also, you want to NSLog the object passed in the method, because that’s all that matters here. Here’s my suggested edits:

-(NSString*) showmessage:(NSString *)trans
    {

        NSLog(@"%@ This is in the transition class",trans);

        return trans;
    }

If this doesn’t work, or prints null, then you are definitely not taking ownership, or suggesting a strong enough retain length, of the string you are passing to this method.

Or, to take a different approach, you imply that you want the class of the object coming through, which would be why you decided to return (id), in which case, you might try

NSLog(@"%@ This is in the transition class",NSStringFromClass([trans class]));

or even add a sender argument to your method: -(NSString*) showmessage:(NSString *)trans withSender:(id)sender;