iOS应用程序被杀但AppleWatch可以发送消息吗？为什么？

Question

1. AppleWatch Enterforground，Watch客户端发送＆＃34; @ {@＆＃34;检查＆＃34;：@＆＃34;我＆＃39; m＆＃34;}＆＃34;
2. iOS客户端收到＆＃34; @ {@＆＃34;检查＆＃34;：@＆＃34;我＆＃39; m＆＃34;}＆＃34; ，使用静态num i重播字典为＆＃34; @ {@＆＃34;检查＆＃34;：@＆＃34; Rcheck_i＆＃34;}＆＃34;
3. 杀死iOS客户端
4. AppleWatch enterbackground，5秒，enterforround，AppleWatch从ios客户端收到消息＆＃34; @ {@＆＃34; check＆＃34;：@＆＃34; Rcheck_i＆＃34;}＆＃34;，what＆ ＃39;错了???

谁可以帮助我，代码是......

// iOS客户端

static int i = 0;
- (void) session:(nonnull WCSession *)session didReceiveMessage:(nonnull NSDictionary<NSString *,id> *)message replyHandler:(nonnull void (^)(NSDictionary<NSString *,id> * __nonnull))replyHandler{
    dispatch_async(dispatch_get_main_queue(), ^{
        i++;
        NSString *temKey = [message.allKeys objectAtIndex:0];
        NSString *temStr = [NSString stringWithFormat:@"%@_%d",temKey,i];
        dispatch_async(dispatch_get_main_queue(), ^{
            self.statusLabel.text = temStr;
        });
        if([message objectForKey:@"check"]){
            NSString *temStr = [NSString stringWithFormat:@"Rcheck_%d",i];
            replyHandler(@{@"check":temStr});
        }
    });
}

// AppleWatch客户端

static int i = 0;
- (void)willActivate {
    [super willActivate];
    i++;
    if ([WCSession isSupported] ) {
        WCSession* session = [WCSession defaultSession];
        session.delegate = self;
        [session activateSession];
        [self performSelector:@selector(checkAction) withObject:nil afterDelay:0.1];
    }
    else{
        [self.lblLockState setText:@"WATCH NOT support"];
    }
}

- (void) checkAction{
    WCSession* session = [WCSession defaultSession];
    [session sendMessage:@{@"check":@"I'm Back"} replyHandler:^(NSDictionary<NSString *,id> * _Nonnull replyHandler) {        
        dispatch_async(dispatch_get_main_queue(), ^{
            NSString *temStr;
            if ([replyHandler objectForKey:@"check"]) {
                temStr = [replyHandler objectForKey:@"check"] ;//[NSString stringWithFormat:@"CheckSucc_%d",i];
            }
            else{
                temStr = [NSString stringWithFormat:@"CheckSucc??_%d",i];
            }
            [self.lblLockState setText:temStr];
        });
    } errorHandler:^(NSError * _Nonnull error) {
        dispatch_async(dispatch_get_main_queue(), ^{
            NSString *temStr = [NSString stringWithFormat:@"CheckFail_%d",i];
            [self.lblLockState setText:temStr];
        });
    }];
}