如何获取系统健康程序的权限和信息

1.首先,我们需要在xcode 中设置HealthKit的开关

2.在需要获取健康信息的地方导入# import<HealthKit/HealthKit.h>

@interfaceViewController ()

 

@property(nonatomic, strong) HKHealthStore *healthStore;

 

@end

 在- (void)viewDidLoad中获取权限

- (void)viewDidLoad {

    [superviewDidLoad];

     

    //查看healthKit在设备上是否可用，ipad不支持HealthKit

    if(![HKHealthStore isHealthDataAvailable])

    {

        NSLog(@"设备不支持healthKit");

    }

     

    //创建healthStore实例对象

    self.healthStore = [[HKHealthStore alloc] init];

     

    //设置需要获取的权限这里仅设置了步数

    HKObjectType *stepCount = [HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount];

     

    NSSet*healthSet = [NSSetsetWithObjects:stepCount, nil];

     

    //从健康应用中获取权限

    [self.healthStore requestAuthorizationToShareTypes:nilreadTypes:healthSet completion:^(BOOLsuccess, NSError* _Nullable error) {

        if(success)

        {

            NSLog(@"获取步数权限成功");

            //获取步数后我们调用获取步数的方法

            [selfreadStepCount];

        }

        else

        {

            NSLog(@"获取步数权限失败");

        }

    }];

     

}

 读取步数

//查询数据

- (void)readStepCount

{

    //查询采样信息

    HKSampleType *sampleType = [HKQuantityType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount];

     

    //NSSortDescriptors用来告诉healthStore怎么样将结果排序。

    NSSortDescriptor*start = [NSSortDescriptorsortDescriptorWithKey:HKSampleSortIdentifierStartDate ascending:NO];

    NSSortDescriptor*end = [NSSortDescriptorsortDescriptorWithKey:HKSampleSortIdentifierEndDate ascending:NO];

     

    /*查询的基类是HKQuery，这是一个抽象类，能够实现每一种查询目标，这里我们需要查询的步数是一个

    HKSample类所以对应的查询类就是HKSampleQuery。

    下面的limit参数传1表示查询最近一条数据,查询多条数据只要设置limit的参数值就可以了

     */

    HKSampleQuery *sampleQuery = [[HKSampleQuery alloc] initWithSampleType:sampleType predicate:nillimit:1 sortDescriptors:@[start,end] resultsHandler:^(HKSampleQuery * _Nonnull query,NSArray<__kindof HKSample *> * _Nullable results,NSError * _Nullable error) {

        //打印查询结果

        NSLog(@"resultCount = %ld result = %@",results.count,results);

        //把结果装换成字符串类型

        HKQuantitySample *result = results[0];

        HKQuantity *quantity = result.quantity;

        NSString*stepStr = (NSString*)quantity;

        [[NSOperationQueuemainQueue] addOperationWithBlock:^{

             

            //查询是在多线程中进行的，如果要对UI进行刷新，要回到主线程中

            NSLog(@"最新步数：%@",stepStr);

        }];

         

    }];

    //执行查询

    [self.healthStore executeQuery:sampleQuery];

}