Can someone please show me an example of a Cocoa Obj-C object, with a custom notification, how to fire it, subscribe to it, and handle it?
@implementation MyObject
// Posts a MyNotification message whenever called
- (void)notify {
[[NSNotificationCenter defaultCenter] postNotificationName:@"MyNotification" object:self];
}
// Prints a message whenever a MyNotification is received
- (void)handleNotification:(NSNotification*)note {
NSLog(@"Got notified: %@", note);
}
@end
// somewhere else
MyObject *object = [[MyObject alloc] init];
// receive MyNotification events from any object
[[NSNotificationCenter defaultCenter] addObserver:object selector:@selector(handleNotification:) name:@"MyNotification" object:nil];
// create a notification
[object notify];
For more information, see the documentation for NSNotificationCenter.