小编Nik*_*ita的帖子

我用CMPedometer设计应用程序,有一个奇怪的问题.我有来自我的客户的日志,我看这个CMPedometerData,我认为真的不正确,我不明白为什么会这样

[2017-04-11 20:16:34 +0000] CMPedometerData,startDate 2017-04-11 20:16:32 +0000 endDate 2017-04-11 20:18:41 +0000步3距离2.130000000004657 floorsAscended(null) floorsDescended(null)currentPace(null)currentCadence(null)averageActivePace 0>

正如你可以看到我的客户端(我无法重现这个错误)从方法得到startPedometerUpdatesFromDatepedometerData和endDate 2017-04-11 20:18:41比现在更大2017-04-11 20:16:34(它是startPedometerUpdatesFromDate之后的第一个CMPedometerData从背景返回后启动 - willEnterForeground方法).也许有人已经遇到过类似的问题？

我的代码部分:

- (void)didEnterBackground {
    dispatch_async(dispatch_get_main_queue(), ^{
        [[Pedometer sharedInstance].motionActivityManager stopActivityUpdates];
        [[Pedometer sharedInstance].pedometer stopPedometerUpdates];
    });
}

- (void)willEnterForeground {
     NSDate *nowDate = [NSDate new];

     /* here is request to get historical data from lastDateUpdate (store in database) to now date */
     [[Pedometer sharedInstance] importDataFrom:lastDateUpdate endDate:nowDate completion:^{
          dispatch_async(dispatch_get_main_queue(), ^{
                /* show info */
          });
      }];    

     dispatch_async(dispatch_get_main_queue(), ^{
          [self startUpdatingData:nowDate]; …