Question

I need to invoke:

[self performSelectorOnMainThread:@selector(chooseURL:) withObject:myIndex waitUntilDone:YES];

But my problem is that myIndex is an int, and NOT an object. Is there a workaround for that?

Answer 1

You have to wrap the int in an object since int is a primitive type and not an object. For example:

[self performSelectorOnMainThread:@selector(chooseURL:) 
                       withObject:[NSNumber numberWithInt:myIndex] 
                    waitUntilDone:YES];

Of course you will have to edit your chooseURL: method to accept a NSNumber instead of an int.
To unwrap:

int myInt = [myIndex intValue];