NSNotificationCenter

服务端：

    [[NSNotificationCenter defaultCenter]postNotificationName:@"selectedCallBack" object:nil];

 

接受方：

    [[NSNotificationCenter defaultCenter]removeObserver:self name:@"selectedCallBack" object:nil];
    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(popupSelected) name:@"selectedCallBack" object:nil];