NSNotificationCenter消息机制

 

1.消息的代理方法

 

-(void) playNotification:(NSNotification*) value

{

 

NSString *currentValue = (NSString*)[value object];

NSDate *currentDate = [NSDate date];

NSLog(@"当前时间%@发布消息的参数%@",currentDate,currentValue);

 

}

 

2.向消息中心参加消息

 

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playNotification:) name:@“slyNotification" object:nil];

3.发布消息

[[NSNotificationCenter defaultCenter] postNotificationName:@“slyNotification" object:@"sly"];