通知

//接收通知

[[NSNotificationCenter defaultCenter] addObserver: selfselector:@selector(xxxxx)name:@"xxxxx"object:nil];

-(void)xxxx

{

}

//釋放通知    [[NSNotificationCenter defaultCenter] removeObserver:selfname:@"" object:nil];

//發送通知

        [[NSNotificationCenter defaultCenter] postNotificationName:@""object:self];