ios - WCSession 发送消息在实际设备上不起作用，但在模拟器上起作用

Question

我正在从 iPhone 向 Watch (WatchOS2) 发送一条消息，其中 iPhone 上运行着一个内部计时器。每隔 30 秒，我就会从 iPhone 发送消息以供观看。不幸的是，发送消息仅在第一次工作，我的 watch 已成功接收。但是，从下一次开始 watch 就收不到任何消息了。整个场景在模拟器中完美运行，但在实际 watch 上却不行。任何帮助，将不胜感激。我试图从主线程发送消息但没有用。关于我哪里做错的任何想法。

提前致谢。

这是我使用的代码

在 watch 侧

//InterfaceController1.m
- (void)willActivate {
// This method is called when watch view controller is about to be visible to user
    [super willActivate];
    if ([WCSession isSupported]) {
      self.session = [WCSession defaultSession];
      self.session.delegate = self;
      [self.session activateSession];
      [self.session sendMessage:@{@"OpeniOS":@"YES"} replyHandler:nil errorHandler:nil];
    }
}
- (void)session:(WCSession *)session didReceiveMessage:(NSDictionary<NSString *, id> *)message replyHandler:(void(^)(NSDictionary<NSString *, id> *replyMessage))replyHandler{
   //able to receive message - dictionary with IssuerNames Array from iPhone
   [self setupTable:message]//I'm setting up my tableview and on click of a row from tableview I'm pushing the user to InterfaceController2.m
}

- (void)table:(WKInterfaceTable *)table didSelectRowAtIndex:(NSInteger)rowIndex{
    [self.session sendMessage:@{@"AccSel":@"YES"} replyHandler:nil errorHandler:nil];
    [self pushControllerWithName:@"InterfaceController2" context:[NSNumber numberWithInteger:rowIndex]];
}

//InterfaceController2.m
- (void)willActivate {
    [super willActivate];
    if ([WCSession isSupported]) {
        _session = [WCSession defaultSession];
        _session.delegate = self;
        [_session activateSession];
    } 
}

-(void)session:(WCSession *)session didReceiveMessage:(NSDictionary<NSString *,id> *)message replyHandler:(void(^)(NSDictionary<NSString *, id> *replyMessage))replyHandler{
    NSLog(@"%@",message); 
}

在iPhone侧

//ViewController1.m
- (void)viewDidLoad {
   [super viewDidLoad];
   // Do any additional setup after loading the view.
   if ([WCSession isSupported]) {
       _session=[WCSession defaultSession];
       _session.delegate=self;
       [_session activateSession];
       [_session sendMessage:@{@"testKey":@"testVal"} replyHandler:nil errorHandler:nil];
   }
}
-(void)session:(WCSession *)session didReceiveMessage:(NSDictionary<NSString *,id> *)message{
    if ([[message objectForKey:@"OpeniOS"] isEqualToString:@"YES"]) {
        NSMutableArray *tempIssuerArray=[[NSMutableArray alloc] init];
        for (OTPToken *token in self.tokenManager.tokens) {
           [tempIssuerArray addObject:token.issuer];
        }
        if ([_session isReachable]) {
           NSDictionary *temp=@{@"IssuerNames":tempIssuerArray};
           [_session sendMessage:temp replyHandler:nil errorHandler:nil];
         }
     }
    if ([[message objectForKey:@"AccSel"] isEqualToString:@"YES"]) {
       OTPToken *token = [self.tokenManager.tokens objectAtIndex:[[message objectForKey:@"selIndex"] intValue]];
       DisplayTokenViewController *dtvc=[self.storyboard instantiateViewControllerWithIdentifier:@"DisplayToken"];
       dtvc.token=token;
       dtvc.tkm=self.tokenManager;
       [self.navigationController pushViewController:dtvc animated:YES];
    }
}

//ViewController2.m
-(void)viewDidLoad {
    [super viewDidLoad];
    mySession=[WCSession defaultSession];
    mySession.delegate=self;
    [mySession activateSession];
    [self refresh]; //this refresh method is called every 30 seconds based on a property change value
 }

- (void)refresh{
     NSDictionary* dict=@{@"code":@"123",@"name":@"abc"};
     [mySession sendMessage:dict replyHandler:nil errorHandler:nil];
 }

实际上，在 watch 端，InterfaceController1.m 首先显示给用户，点击 InterfaceController1.m 的按钮，用户重定向到 InterfaceController2.m。同时，在 iPhone 端，我在收到来自 watch 的消息时从 ViewController1.m 推送 ViewController2.m。

这里，refresh 方法只调用一次，每 30 秒调用一次，理想情况下应该调用 refresh 方法，而不是在实际设备中调用。但一切都在模拟器中完美运行

Answer 1

当您将 WCSession sendMessage API 与 nil replyHandler 一起使用时，如下所示:

[_session sendMessage:@{@"testKey":@"testVal"} replyHandler:nil errorHandler:nil];

您需要在接收端实现以下委托(delegate)方法:

- (void)session:(WCSession *)session didReceiveMessage:(NSDictionary<NSString *, id> *)message {
    //able to receive message - dictionary with IssuerNames Array from iPhone
    [self setupTable:message]//I'm setting up my tableview and on click of a row from tableview I'm pushing the user to InterfaceController2.m
}

而不是 session :didReceiveMessage:replyHandler:。因此，在上面的示例中， watch 端的 InterfaceController1.m 似乎无法像您所说的那样接收消息。我猜你可能只是在为 SO 清理代码时犯了复制粘贴错误。