Home/ Questions/Q 367151
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-12T13:42:02+00:00

A typical call to performSelectorOnMainThread: looks like this: [target performSelectorOnMainThread:action withObject:foo waitUntilDone:NO]; where result

  • 0

A typical call to performSelectorOnMainThread: looks like this:

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

where “result” is an argument passed to “action”. A corresponding action would be:

- (void)doSomethingWithThing1:(id *)thing1

What is the correct syntax for calling an action that takes > 1 argument? Such as:

- (void)doSomethingWithThing1:(id *)thing1 andThing2(id *)thing2 andAlsoThing3(id *)thing3

[target performSelectorOnMainThread:action withObject:??? waitUntilDone:NO];
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    In response to a similar question on passing non-objects to a method in performSelectorOnMainThread:, I pointed out Dave Dribin’s category on NSObject, which lets you do something like the following:

    [[person dd_invokeOnMainThread] doSomethingWithThing1:thing1 andThing2:thing2 andAlsoThing3:thing3];

    for performing your multi-argument method on the main thread. I think this is a pretty elegant solution. Behind the scenes, he wraps things in an NSInvocation, invoking that on the main thread.

    The Amber framework does something similar to this, as well.

    • 0