Best way to performselectoronmainthread in objective c?

Question

I\'m writing a client-server app to iPhone. And I have a question about threading. When I access my online database from the device, I need to do this on a separate thread to no

Answer 1

since you are passing instance variables, another option would be to pass self and make self thread safe.

Answer 2

Well, you're already using dispatch_async. Then you should just use

     dispatch_async(dispatch_get_main_queue(),^ { ... } );

from inside your background thread to perform things on the main thread. For example,

     if ([self testServerMethod])
        {
            dispatch_async(dispatch_get_main_queue(),^ {
               [self showMessageBoxWithString: @"Server is working!"];
               [self threadedUIActivityRemover:nil];
            } );
        }else ...

It doesn't have any constraint on the number of arguments for the methods you call.

Answer 3

Pass a collection, such as a dictionary of unarchived objects.

Answer 4

You can also use an NSInvocation.