multiple listeners for delegate iOS

Question

I have a class search bar with a delegate didSelectString. I have an class A that implements the delegate and a class B that implements the delegate.

However only the de

Answer 1

The delegation is a single messaging protocol. You'll need to use NSNotifications if you want to message multiple objects of a change.

You can pass an object using notifications centre like so:

NSDictionary *userInfo = @{@"myObject" : customObject};

NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc postNotificationName:@"myNotificationString" object:self userInfo:userInfo];

When wanting to listen for notifications

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(myCustomObserver:)name:@"myNotificationString" object:nil];

And setting up the selector

-(void)myCustomObserver:(NSNotification *)notification{
    CustomObject* customObject = notification.userInfo[@"myObject"];
}