Running a method async, and call method on finish in Objective-C. Good for running method while updating the UI on OS X. Used some code from here: http://stackoverflow.com/questions/8854100/objective-c-async-call-a-method-using-ios-4

Run Async Method and run method afterwards

- (void) someMethod{
    [self dispatchBlockAsync:^{
        [self method1];
    } callOnReturn:^{
        [self method2];]
    }];
}

- (void)dispatchBlockAsync:(void(^)(void))callBlock callOnReturn:(void(^)(void))returnBlock{
    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
    dispatch_async(queue, ^ {
        callBlock();
        dispatch_async(dispatch_get_main_queue(), ^ {
            returnBlock();
        });
    });
}