iOS开发之：NSNotificationCenter（通知）的使用方法

-
(void)callBack{

    NSLog(@"thisis
Notification.");

}

[[NSNotificationCenter
defaultCenter] addObserver:self

    selector:@selector(callBack)

    name:@"back"

    object:nil];

-
(void)getNotofocation{

    NSLog(@"getit.");

    //发出通知

    [[NSNotificationCenterdefaultCenter]
postNotificationName:@"back"object:self];

}

4.
移出通知：

-
(void)dealloc{

    [[NSNotificationCenterdefaultCenter]
removeObserver:self name:@"back"object:nil];

    [superdealloc];

}