Passing custom data in [UIButton addTarget]

Question

How do I add custom data while specifying a target in a UIButton?

id data = getSomeData();
[button addTarget:self 
           action:@selector(b         


        

Answer 1

You can't really do that. What you can do is put the data in a dictionary and use the button to get it later.

E.g.

myDataDict = [NSDictionary dictionaryWithObjectsAndKeys:someData, button, nil];

Then later;

-(void) buttonPress:(id)sender
{
  data = [dataDict objectForKey:sender];
}

If your buttons are specified in InterfaceBuilder you can use the 'tag' property of a button to lookup the data, although you will need to convert it to an NSNumber for use with the dictionary.