IOS 通知

//监听
- (void)viewDidLoad {
    [super viewDidLoad];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(getServiceData) name:KHomePageViewController_getServiceData object:nil];    
}
- (void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver:self name:KHomePageViewController_getServiceData object:nil];
}

//发送
        [[NSNotificationCenter defaultCenter] postNotificationName:KHomePageViewController_getServiceData object:nil];

Warning: 因为监听执行的代码的线程为发送者所在线程。为了确保线程正确，请手动添加合适线程。