How do I call performSelectorOnMainThread: with an selector that takes > 1 arguments?

Question

A typical call to performSelectorOnMainThread: looks like this:

[target performSelectorOnMainThread:action withObject:foo waitUntilDone:NO];
         


        

Answer 1

If you wish to preserve the method signature of the receiver then I think you'll need to look at using NSInvocation which allows you to specify multiple argument values.

You could wrap your call and use a dictionary as a container for your arguments as suggested in another answer but to me this seems like a bit of a code smell.

A better solution along this line would be to create a class that encapsulates the argument values - i.e. a strongly typed approach. So for example instead of passing firstname, surname, you'd pass an instance of a Person class. This is probably a better route to go down because methods with fewer arguments can yield cleaner code - but that's a whole other story.