Detect when home button is pressed iOS

Question

I have several iOS apps that all use the same port to listen for a network beacon. On the main view I use viewWillDisappear to close the port when another view is opened, w

Answer 1

The easiest way to handle this is to register to receive the UIApplicationWillResignActiveNotification notification in your view controller.

The event is issued upon a home button press, lock and upon a phone call

- (void) applicationWillResign{
    NSLog(@"About to lose focus");
}

- (void) myVcInitMethod { 
    [[NSNotificationCenter defaultCenter]
        addObserver:self
        selector:@selector(applicationWillResign)
        name:UIApplicationWillResignActiveNotification 
        object:nil];
}