1. plist配置權(quán)限

NSHealthShareUsageDescription：讀取用戶健康數(shù)據(jù)
NSHealthUpdateUsageDescription：更改用戶健康數(shù)據(jù)

2. 設(shè)備支持與授權(quán)

HealthKit是iOS8加入的API
HealthKit在iPad上不可用
通過HKHealthStore類方法 + (BOOL)isHealthDataAvailable;判斷設(shè)備是否支持HealthKit

    BOOL isSupport = [HKHealthStore isHealthDataAvailable];
    if (isSupport)  {
        HKQuantityType *weightType = [HKQuantityType quantityTypeForIdentifier:HKQuantityTypeIdentifierBodyMass];
        HKQuantityType *BodyFat = [HKQuantityType quantityTypeForIdentifier:HKQuantityTypeIdentifierBodyFatPercentage];
        /// 體重和體脂率
        NSSet *set = [NSSet setWithObjects:weightType, BodyFat,nil];
        
        HKHealthStore *healthStore = [[HKHealthStore alloc]init];
        /// ShareTypes寫入權(quán)限申請(qǐng)    readTypes讀取權(quán)限申請(qǐng)
        [healthStore requestAuthorizationToShareTypes:set readTypes:set completion:^(BOOL success, NSError * _Nullable error) {
        
        }];
    }
    

3. 健康數(shù)據(jù)的寫入與讀取

以體重為例，將體重寫入至健康，

健康類型對(duì)象構(gòu)建——HKQuantitySample quantitySampleWithType::::

• quantityType：數(shù)據(jù)類型（體重）
• quantity：值類型（kg）
• startDate：起始時(shí)間（NSDate）
• endDate：結(jié)束時(shí)間（NSDate），對(duì)于非持續(xù)性的數(shù)據(jù)類型用同一個(gè)就行函荣。

寫入方法——HKQuantitySample saveObject:

• saveObject：健康類型的數(shù)據(jù)對(duì)象

    HKHealthStore * healthStore = [[HKHealthStore alloc] init];
    HKQuantityType *weightType = [HKQuantityType quantityTypeForIdentifier:HKQuantityTypeIdentifierBodyMass];
    HKQuantity *weightQuantity = [HKQuantity quantityWithUnit:[HKUnit unitFromString:@"kg"] doubleValue:69.3];
    
    theDate = [NSDate date];
    HKQuantitySample *weightSample = [HKQuantitySample quantitySampleWithType:weightType quantity:weightQuantity startDate:theDate endDate:theDate];
        
    [healthStore saveObject:weightSample withCompletion:^(BOOL success, NSError *error) {
            if (!success) {
                NSLog(@"An error occured saving the weight sample %@. In your app, try to handle this gracefully. The error was: %@.", weightSample, error);
                return ;
            }
    }];        

數(shù)據(jù)讀取有多種方式，我主要說下HKSampleQuery（樣本查詢）和HKStatisticsCollectionQuery（統(tǒng)計(jì)集合查詢）

HKSampleQuery 這是使用最多的查詢磅甩。使用樣本查詢來讀取任何類型的樣本數(shù)據(jù)假残。當(dāng)你想要對(duì)結(jié)果進(jìn)行排序或者限制返回的樣本總數(shù)時(shí)米间，樣本查詢就特別有用滩援。更多信息栅隐，參見 HKSampleQuery Class Reference

樣本查詢——HKSampleQuery initWithSampleType

• SampleType：查詢值類型（體重）
• predicate：查詢條件（起始-結(jié)束時(shí)間）
• limit：最大結(jié)果數(shù)（HKObjectQueryNoLimit-不作限制）
• sortDescriptors：結(jié)果排序（時(shí)間正序）
• resultsHandler：回調(diào)，一般需求遍歷results就行

- (void)testHKSampleQuery {
    
    HKHealthStore *healthStore = [[HKHealthStore alloc]init];
    
    HKQuantityType *sampleType = [HKQuantityType quantityTypeForIdentifier:HKQuantityTypeIdentifierBodyMass];
    
    NSDate *now = [NSDate date];
    NSDate *endDate = [now dateTools_dateByAddingDays:1];
    NSDate *startDate = [endDate dateTools_dateByAddingDays:-100];
    NSPredicate *pre = [HKQuery predicateForSamplesWithStartDate:startDate endDate:endDate options:HKQueryOptionStrictStartDate];
    
    /// 測(cè)試了下key用HKSampleSortIdentifierEndDate  和上述pre的options不一致 也有正常結(jié)果
    NSSortDescriptor *start = [NSSortDescriptor sortDescriptorWithKey:HKSampleSortIdentifierStartDate ascending:YES];
    
    HKSampleQuery *sampleQuery = [[HKSampleQuery alloc] initWithSampleType:sampleType predicate:pre limit:HKObjectQueryNoLimit sortDescriptors:@[start] resultsHandler:^(HKSampleQuery * _Nonnull query, NSArray<__kindof HKSample *> * _Nullable results, NSError * _Nullable error) {
        
        for (HKQuantitySample *result in results) {
            
            double weight = [result.quantity doubleValueForUnit:[HKUnit unitFromString:@"kg"]];
            
            NSString *value = [NSString stringWithFormat:@"%.2f",weight];
                        
            NSString *createTime = [NSString stringWithFormat:@"%ld", (long)[result.startDate timestamp]];
            
            NSLog(@"====value:%@====createTime:%@====", value, createTime);
        }
    }];
    
    /// 執(zhí)行查詢
    [healthStore executeQuery:sampleQuery];
}

HKStatisticsCollectionQuery玩徊，使用這種查詢來在一系列長(zhǎng)度固定的時(shí)間間隔中執(zhí)行多次統(tǒng)計(jì)查詢租悄。通常使用這種查詢來生成圖表。查詢提供了一些簡(jiǎn)單的方法來計(jì)算某些值恩袱，例如泣棋，每天消耗的總熱量或者每5分鐘行走的步數(shù)。統(tǒng)計(jì)集合查詢是長(zhǎng)時(shí)間運(yùn)行的畔塔。查詢可以返回當(dāng)前的統(tǒng)計(jì)集合外傅，也可以監(jiān)測(cè)HealthKit存儲(chǔ)纪吮，并對(duì)更新做出響應(yīng)。更多信息萎胰，參見 HKStatisticsCollectionQuery Class Reference 。

統(tǒng)計(jì)集合查詢——HKStatisticsCollectionQuery initWithQuantityType

• quantityType：查詢值類型（體重）
• quantitySamplePredicate：查詢條件（起始-結(jié)束時(shí)間）
• options：用于定義執(zhí)行的統(tǒng)計(jì)計(jì)算的類型以及合并來自多個(gè)源的數(shù)據(jù)的方式
  • HKStatisticsOptionSeparateBySource 數(shù)據(jù)來源統(tǒng)計(jì)
  • HKStatisticsOptionDiscreteAverage 平均值統(tǒng)計(jì)
  • HKStatisticsOptionDiscreteMin 最小值統(tǒng)計(jì)
  • HKStatisticsOptionDiscreteMax 最大值統(tǒng)計(jì)
  • HKStatisticsOptionCumulativeSum 和統(tǒng)計(jì)
  • HKStatisticsOptionMostRecent 最近的值
• anchorDate：統(tǒng)計(jì)數(shù)據(jù)時(shí)間間隔的定位時(shí)間（星期一上午12:00）
• intervalComponents：統(tǒng)計(jì)數(shù)據(jù)的時(shí)間間隔（3天）

- (void)tesHKStatisticsCollectionQuery {

    HKHealthStore *healthStore = [[HKHealthStore alloc]init];
    // 數(shù)據(jù)類型
    HKQuantityType *type = [HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierBodyMass];
    
    // 獲取數(shù)據(jù)的截止時(shí)間 今天
    NSDate *endDate = [NSDate date];
    // 獲取數(shù)據(jù)的起始時(shí)間 此處取從今日往前一年的數(shù)據(jù)
    NSDate *startDate = [NSDate dateWithTimeIntervalSinceNow:-365*24*60*60];
    // 查詢條件棚辽，用于獲取設(shè)置時(shí)間段內(nèi)的數(shù)據(jù)
    NSPredicate *predicate = [HKQuery predicateForSamplesWithStartDate:startDate endDate:endDate options:HKQueryOptionStrictStartDate];

    // 設(shè)置時(shí)間支持單位
    NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    NSDateComponents *anchorComponents = [calendar components:NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear | NSCalendarUnitWeekday fromDate:[NSDate date]];
    NSInteger offset = (7 + anchorComponents.weekday - 2) % 7;
    /// 日期設(shè)置為星期一上午12:00  也就是第一個(gè)統(tǒng)計(jì)數(shù)據(jù)的開始時(shí)間為星期一12點(diǎn)
    anchorComponents.day -= offset;
    anchorComponents.hour = 12;
    NSDate *anchorDate = [calendar dateFromComponents:anchorComponents];
    
    // 統(tǒng)計(jì)數(shù)據(jù)的時(shí)間間隔（一定要比0大）技竟，例如設(shè)為3，則返回的統(tǒng)計(jì)數(shù)據(jù)跨度為3天屈藐，例如2020-07-10 —— 2020-07-13
    NSDateComponents *intervalComponents = [[NSDateComponents alloc] init];
    intervalComponents.day = 3;

    HKStatisticsCollectionQuery *query = [[HKStatisticsCollectionQuery alloc] initWithQuantityType:type quantitySamplePredicate:predicate options:HKStatisticsOptionSeparateBySource | HKStatisticsOptionDiscreteAverage anchorDate:anchorDate intervalComponents:intervalComponents];
    
    query.initialResultsHandler = ^(HKStatisticsCollectionQuery *query, HKStatisticsCollection *result, NSError *error) {
        
        NSLog(@"%@",[result statistics]);
        for (HKStatistics *sample in [result statistics]) {
            
            double weight = [sample.averageQuantity doubleValueForUnit:[HKUnit unitFromString:@"kg"]];
            
            NSString *value = [NSString stringWithFormat:@"%.2f",weight];
                                    
            NSLog(@"====averageValue:%@====startDate:%@======", value, sample.startDate);
        }
    };
    [healthStore executeQuery:query];
}

4. 健康數(shù)據(jù)的修改

健康的數(shù)據(jù)只有添加和刪除榔组，所謂修改就是刪除一條再添加一條。
我這里的思路联逻，刪除的依據(jù)是時(shí)間搓扯，對(duì)體重?cái)?shù)據(jù)的修改只能修改數(shù)值，不能修改時(shí)間包归，所以查出同時(shí)間的數(shù)據(jù)锨推，刪除舊的，再添加新的公壤。

deleteObject的對(duì)象和saveObject雖然類型一致换可，但是倘若按照saveObject的方法去構(gòu)建，是不能成功刪除的厦幅，所以經(jīng)測(cè)試后只能先查詢沾鳄，再刪除。

- (void)testUpdate {
    
    HKHealthStore * healthStore = [[HKHealthStore alloc] init];
    HKQuantityType *weightType = [HKQuantityType quantityTypeForIdentifier:HKQuantityTypeIdentifierBodyMass];
    
    /// 已添加體重的時(shí)間
    NSDate *theDate = [NSDate dateWithTimeIntervalSince1970:1594608650];
    /// 修改后的數(shù)值
    double weight  = 75;
    HKQuantity *weightQuantity = [HKQuantity quantityWithUnit:[HKUnit unitFromString:@"kg"] doubleValue:weight];
    
    HKQuantitySample *weightSample = [HKQuantitySample quantitySampleWithType:weightType quantity:weightQuantity startDate:theDate endDate:theDate];
    
    ///查詢條件 指定時(shí)間~指定時(shí)間+1S  查詢條數(shù)為1
    NSPredicate *pre = [HKQuery predicateForSamplesWithStartDate:theDate endDate:[theDate dateTools_dateByAddingSeconds:1] options:HKQueryOptionStrictStartDate];
    NSSortDescriptor *start = [NSSortDescriptor sortDescriptorWithKey:HKSampleSortIdentifierStartDate ascending:YES];
    
    HKSampleQuery *sampleQuery = [[HKSampleQuery alloc] initWithSampleType:weightType predicate:pre limit:1 sortDescriptors:@[start] resultsHandler:^(HKSampleQuery * _Nonnull query, NSArray<__kindof HKSample *> * _Nullable results, NSError * _Nullable error) {
        //打印查詢結(jié)果
        NSLog(@"%@",results);
        if (results.count > 0) {
            HKQuantitySample *result = results.firstObject;
            [healthStore deleteObject:result withCompletion:^(BOOL success, NSError * _Nullable error) {
                if (!success) {
                    NSLog(@"An error occured delete the weight sample %@. In your app, try to handle this gracefully. The error was: %@.", weightSample, error);
                }
                [healthStore saveObject:weightSample withCompletion:^(BOOL success, NSError *error) {
                    if (!success) {
                        NSLog(@"An error occured saving the weight sample %@. In your app, try to handle this gracefully. The error was: %@.", weightSample, error);
                    }
                }];
            }];
        } else {
            [healthStore saveObject:weightSample withCompletion:^(BOOL success, NSError *error) {
                if (!success) {
                    NSLog(@"An error occured saving the weight sample %@. In your app, try to handle this gracefully. The error was: %@.", weightSample, error);
                }
            }];
        }
    }];
    [healthStore executeQuery:sampleQuery];
}