The NSNotificationCenter is never executed

manpreet Best Answer 3 years ago

This is my code.

Here create the observer to Notification called Example into ViewController

- (void)addObserverExample
{
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(example:)
                                             name:@"Example"
                                           object:nil];
}


- (void)example:(NSNotification *)notification{
   NSLog(@"Example!!!");
}

From viewDidLoad register my observer

- (void)viewDidLoad
{
  [self addObserverExample];
}

In my second ViewController. When tapped a button excute this code:

[[NSNotificationCenter defaultCenter] postNotificationName:@"Example" object:self.dictKeys userInfo:nil];

The problem I have is that the notification is never executed.

Any idea.

manpreet 3 years ago

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    [self addObserverExample];
}

- (void)addObserverExample
{
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(example:)
                                                 name:@"Example"
                                               object:nil];
}


- (void)example:(NSNotification *)notification{
    NSLog(@"Example!!!");
    NSLog(@"%@",notification.userInfo);
}
- (IBAction)btnFireNotification:(id)sender {
    [[NSNotificationCenter defaultCenter] postNotificationName:@"Example" object:nil userInfo:@{@"key" : @"value"}];
}