Question

I need to create a dialog from a thread.
Im loading a nib file within the thread using the “initwithwindowNibName” and trying to popup the dialog using “[nsapp runmodalforwindow]”,but the dialog is not popping up..

Please help me out.

Answer 1

AppKit, the GUI framework, is not thread safe. In order for things to work properly, you (almost) always need to update GUI classes from the main thread

— Dave Dribin, Invoke on Main Thread

Basically, you’ll want to do something like:

[objectThatShowsTheDialog performSelectorOnMainThread:@selector(showTheDialog:)
                                           withObject:anObject
                                        waitUntilDone:NO];

to call the code that puts up the dialog on the the main thread.