ios开发 不同页面发送消息

-(void)viewWillAppear:(BOOL)animated{    [super viewWillAppear:animated];    //注册观察者,接受消息并处理    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(refreshMachineList_fun:) name:@"refreshMachineList" object:nil];}-(void)refreshMachineList_fun:(NSNotification*)data{    NSLog(@"接收到消息");}

添加到发送消息的地方

<span style="font-size:24px;">[[NSNotificationCenter defaultCenter] postNotificationName:@"refreshMachineList" object:nil];</span>