如何实现CMStepCounter CoreMotion - M7芯片

Question

我想知道是否有人可以向我展示如何实施CMStepCounter的示例.(我查看了文档,但仍然对如何实现有点困惑).

我想在每次采取步骤时更新我的​​视图上的UILabel.我也希望让应用程序在关闭时继续计算步数.

我对iOS比较新,任何帮助都会非常感激:)!

谢谢,瑞恩

Answer 1

您应该按如下方式实现它

#import "ViewController.h"
#import <CoreMotion/CoreMotion.h>

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UILabel *stepsCountingLabel;  // Connect this outlet to your's label in xib file.
@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];
            }];
        }];
    }
}

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

@end

但请注意,有时startStepCountingUpdatesToQueue的块会延迟更新numberOfSteps.