简单的计步器实现

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

@interface ViewController ()

@property (nonatomic, strong) CMStepCounter *conter;

@property (weak, nonatomic) IBOutlet UILabel *stepLabel;

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];

// 1、判断计步器是否可用
if (![CMStepCounter isStepCountingAvailable]) {return;}

// 2、开始计步
[self.conter startStepCountingUpdatesToQueue:[NSOperationQueue mainQueue] updateOn:5 withHandler:^(NSInteger numberOfSteps, NSDate * _Nonnull timestamp, NSError * _Nullable error) {

self.stepLabel.text = [NSString stringWithFormat:@"一共走了%ld步", numberOfSteps];
}];

}

- (CMStepCounter *)conter{
if (_conter == nil) {
_conter = [[CMStepCounter alloc] init];
}
return _conter;
}