Set up listener for NSNotification in Objective-C for "Broadcasting with NSNotification Center."

ViewController.m

[[NSNotificationCenter defaultCenter] addObserverForName:@”SomeActionIsComplete” object:nil queue:nil usingBlock:^(NSNotification *note)
{
    NSLog(@”The action I was waiting for is complete!!!”);
    [self dismissViewControllerAnimated:YES completion:nil];
}];