https://blog.csdn.net/u012265444/article/details/51861085

Screen Shot 2018-06-01 at 10.29.54 AM.png

Privacy - Health Share Usage Description 
Privacy - Health Update Usage Description

IMG_1292.PNG

//
//  ViewController.m
//  healthKit
//
//  Created by lzy on 2018/6/1.
//  Copyright © 2018 zbc. All rights reserved.
//

#import "ViewController.h"
#import <HealthKit/HealthKit.h>
@interface ViewController ()

 @property(nonatomic,strong) HKHealthStore *healthStore;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    if (![HKHealthStore isHealthDataAvailable]) {
        NSLog(@"该设备不支持HealthKit");
    }
    
    self.healthStore = [[HKHealthStore alloc]init];
    
    //设置需要获取的权限 这里仅设置了步数
    HKObjectType *stepType = [HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount];
    HKObjectType *HeightType = [HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierHeight];
        HKObjectType *BodytType = [HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierLeanBodyMass];
    NSSet *healthSet = [NSSet setWithObjects:stepType, HeightType,BodytType,nil];
    
    //从健康应用中获取权限
    [self.healthStore requestAuthorizationToShareTypes:nil readTypes:healthSet completion:^(BOOL success, NSError * _Nullable error) {
        if (success) {
            //获取步数后我们调用获取步数的方法
            [self readStepCount];
        }
        else
        {
            NSLog(@"获取步数权限失败");
        }
    }];
 
}

- (void)readStepCount
{
    //查询采样信息
    HKSampleType *sampleType = [HKQuantityType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount];
    //NSSortDescriptor来告诉healthStore怎么样将结果排序
    NSSortDescriptor *start = [NSSortDescriptor sortDescriptorWithKey:HKSampleSortIdentifierStartDate ascending:NO];
    NSSortDescriptor *end = [NSSortDescriptor sortDescriptorWithKey:HKSampleSortIdentifierEndDate ascending:NO];
    //获取当前时间
    NSDate *now = [NSDate date];
    NSCalendar *calender = [NSCalendar currentCalendar];
    NSUInteger unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
    NSDateComponents *dateComponent = [calender components:unitFlags fromDate:now];
    int hour = (int)[dateComponent hour];
    int minute = (int)[dateComponent minute];
    int second = (int)[dateComponent second];
    NSDate *nowDay = [NSDate dateWithTimeIntervalSinceNow:  - (hour*3600 + minute * 60 + second) ];
    //时间结果与想象中不同是因为它显示的是0区
    NSLog(@"今天%@",nowDay);
    NSDate *nextDay = [NSDate dateWithTimeIntervalSinceNow:  - (hour*3600 + minute * 60 + second)  + 86400];
    NSLog(@"明天%@",nextDay);
    NSPredicate *predicate = [HKQuery predicateForSamplesWithStartDate:nowDay endDate:nextDay options:(HKQueryOptionNone)];
    
    /*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:predicate limit:0 sortDescriptors:@[start,end] resultsHandler:^(HKSampleQuery * _Nonnull query, NSArray<__kindof HKSample *> * _Nullable results, NSError * _Nullable error) {
        //设置一个int型变量来作为步数统计
        int allStepCount = 0;
        for (int i = 0; i < results.count; i ++) {
            //把结果转换为字符串类型
            HKQuantitySample *result = results[I];
            HKQuantity *quantity = result.quantity;
            NSMutableString *stepCount = (NSMutableString *)quantity;
            NSString *stepStr =[ NSString stringWithFormat:@"%@",stepCount];
            //获取51 count此类字符串前面的数字
            NSString *str = [stepStr componentsSeparatedByString:@" "][0];
            int stepNum = [str intValue];
            NSLog(@"%d",stepNum);
            //把一天中所有时间段中的步数加到一起
            allStepCount = allStepCount + stepNum;
        }
        
        //查询要放在多线程中进行，如果要对UI进行刷新，要回到主线程
        [[NSOperationQueue mainQueue]addOperationWithBlock:^{
            NSString *str = [NSString stringWithFormat:@"%d",allStepCount];
            NSLog(@"%@",str);
        }];
    }];
    //执行查询
    [self.healthStore executeQuery:sampleQuery];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


@end