Dispatch Async to Main Queue and Modal Windows
Instead of dispatching the
completion()to the main queue, I call it directly from the background thread. In the completion block itself, I decide how to get the code should run in the main thread. If my window isn’t modal, then I can usedispatch_async(dispatch_get_main_queue(), ^{}). But if my window is modal, which just happens to be the case for the app I’m working on, then I use-performSelectorOnMainThread:withObject:waitUntilDone:.
2 Comments RSS · Twitter
August 15, 2015 9:34 PM
On a similar note, have fun making a WebView that works inside a modal window. It'll never load its content because it's waiting on something to be dispatched in the main thread.
Regularly scheduled service announcement:
Instead of
[receiver performSelectorOnMainThread:@selector(done) withObject:nil waitUntilDone:NO];
use HOM:
[[receiver onMainThread] done];
