CMStepCounter 不提供步数答案

【问题标题】：CMStepCounter not providing step countCMStepCounter 不提供步数
【发布时间】：2014-04-21 11:44:49
【问题描述】：

我正在尝试探索 CoreMotion 并且我正在尝试使用 CMStepCounter 类来获取步数。这是我如何实现我的view controller 来获得stepCounts

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UILabel *stepsCountingLabel;  
@property (nonatomic, strong) CMStepCounter *cmStepCounter;
@property (nonatomic, strong) NSOperationQueue *operationQueue;

@end

@implementation ViewController

- (NSOperationQueue *)operationQueue
{
    if (_operationQueue == nil)
    {
        _operationQueue = [NSOperationQueue new];
    }
    return _operationQueue;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    if ([CMStepCounter isStepCountingAvailable])
    {
        self.cmStepCounter = [[CMStepCounter alloc] init];
        [self.cmStepCounter startStepCountingUpdatesToQueue:self.operationQueue updateOn:1 withHandler:^(NSInteger numberOfSteps, NSDate *timestamp, NSError *error)
         {
             [[NSOperationQueue mainQueue] addOperationWithBlock:^{
                 [self updateStepCounterLabelWithStepCounter:numberOfSteps];
             }];
         }];
    }
    else
    {
        self.stepsCountingLabel.text = @"NO STEP COUNTING AVAILABLE";
    }
}

- (void)updateStepCounterLabelWithStepCounter:(NSInteger)countedSteps
{
    self.stepsCountingLabel.text = [NSString stringWithFormat:@"%ld", (long)countedSteps];
}

但是当我带着设备走路时，我没有得到任何更新，但是当我摇动设备时，它给了我一些随机的numberOfSteps 计数。如果我错过了什么，请告诉我。

【问题讨论】：

标签： ios iphone ios7 core-motion

【解决方案1】：

试试下面的方法。我认为它会起作用。从 viewdidload 调用 startStepCalculations 方法。我正在计算 1 天的步数。

- (void)startStepCalculations {
 if (!self.stepCounter) {
    self.stepCounter = [[CMStepCounter alloc] init];
  }
  if (![CMStepCounter isStepCountingAvailable]) {
    return;
  }
 NSCalendar *cal = [NSCalendar currentCalendar];
  NSDateComponents *components = [cal components:(NSHourCalendarUnit |
                                                  NSMinuteCalendarUnit |
                                              NSSecondCalendarUnit)
                                    fromDate:[[NSDate alloc] init]];

   [components setHour:-[components hour]];
   [components setMinute:-[components minute]];
   [components setSecond:-[components second]];
    NSDate *start = [cal dateByAddingComponents:components toDate:[[NSDate alloc] init] options:0];

  [components setHour:+24];
  [components setMinute:0];
  [components setSecond:0];
  NSDate *end = [cal dateByAddingComponents:components toDate:start options:0];

  NSOperationQueue *queue = [NSOperationQueue mainQueue];
  [self.stepCounter queryStepCountStartingFrom:start
                                        to:end
                                   toQueue:queue
                               withHandler:^(NSInteger numberOfSteps, NSError *error) {
   if (error) {
     NSLog(@"ERROR : %@",error.localizedDescription);
     return;
   }
   self.steps = numberOfSteps;
   [[UIApplication sharedApplication] setApplicationIconBadgeNumber:self.steps];
   [self beginMonitoringForNewSteps];
  }];
}


 - (void)beginMonitoringForNewSteps {
  if (!self.stepCounter) {
   self.stepCounter = [[CMStepCounter alloc] init];
  }
 NSOperationQueue *queue = [NSOperationQueue mainQueue];
  [self.stepCounter startStepCountingUpdatesToQueue:queue
                                       updateOn:1
                                    withHandler:^(NSInteger numberOfSteps, NSDate *timestamp, NSError *error) {
// calculate the total steps (today + new)
   self.steps += (int)numberOfSteps;
 //TODO badge number should be 1000 max
     [[UIApplication sharedApplication] setApplicationIconBadgeNumber:self.steps];
    }];
}

让我知道它是否有效。

编码愉快！！！

【讨论】：