__weak ViewController *weakSelf = self;
self.operationQueue = [[NSOperationQueue alloc] init];

NSCalendar *calendar = [NSCalendar currentCalendar];
NSDate *now = [NSDate date];
NSDateComponents *components = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay fromDate:now];
// 开始日期
NSDate *startDate = [calendar dateFromComponents:components];
// 结束日期
NSDate *endDate = [calendar dateByAddingUnit:NSCalendarUnitDay value:1 toDate:startDate options:0];

  if ([CMStepCounter isStepCountingAvailable]) {
    [self.stepCounter  queryStepCountStartingFrom:startDate to:endDate toQueue:self.operationQueue withHandler:^(NSInteger numberOfSteps, NSError * _Nullable error) {
        NSLog(@"%ld",numberOfSteps);
        dispatch_async(dispatch_get_main_queue(), ^{
            if (error) {
                UIAlertView *error = [[UIAlertView alloc] initWithTitle:@"Opps!" message:@"error" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
                [error show];
            }
            else {
                weakSelf.totalLabel.text = [NSString stringWithFormat:@"今日总步数%ld",numberOfSteps];
            }
        });
    }];
}

  if ([CMStepCounter isStepCountingAvailable]) {
    self.stepCounter = [[CMStepCounter alloc] init];
    [self.stepCounter startStepCountingUpdatesToQueue:self.operationQueue
                                             updateOn:1
                                          withHandler:
     ^(NSInteger numberOfSteps, NSDate *timestamp, NSError *error) {
         
         dispatch_async(dispatch_get_main_queue(), ^{
             
             if (error) {
                 UIAlertView *error = [[UIAlertView alloc] initWithTitle:@"Opps!" message:@"error" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
                 [error show];
             }
             else {
                 
                 NSString *text = [NSString stringWithFormat:@"当前步数: %ld", (long)numberOfSteps];
                 //这里是步数
                 weakSelf.stepsLabel.text = text;
             }
         });
     }];
}

  if ([CMMotionActivityManager isActivityAvailable]) {
    self.activityManager = [[CMMotionActivityManager alloc] init];
    [self.activityManager startActivityUpdatesToQueue:self.operationQueue
                                          withHandler:
     ^(CMMotionActivity *activity) {
         
         dispatch_async(dispatch_get_main_queue(), ^{
             
             NSString *status = [weakSelf statusForActivity:activity];
             NSString *confidence = [weakSelf stringFromConfidence:activity.confidence];
             
             weakSelf.statusLabel.text = [NSString stringWithFormat:@"状态: %@", status];
             weakSelf.confidenceLabel.text = [NSString stringWithFormat:@"速度: %@", confidence];
         });
     }];
}