iOS-OC-修改微信运动步数（读取和修改健康步数HealthKit）

1.首先打开HealthKit

2.导入HealthKit.framework，并且导入头文件

3.获取步数的写入和读取权限；

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    [self isHealthDataAvailable];
    return YES;
}

#pragma mark - 获取健康权限
- (void)isHealthDataAvailable{
    if ([HKHealthStore isHealthDataAvailable]) {
        HKHealthStore *healthStore = [[HKHealthStore alloc]init];
        NSSet *writeDataTypes = [self dataTypesToWrite];
        NSSet *readDataTypes = [self dataTypesToRead];
        [healthStore requestAuthorizationToShareTypes:writeDataTypes readTypes:readDataTypes completion:^(BOOL success, NSError *error) {
            if (!success) {
                NSLog(@"你不允许包来访问这些读/写数据类型。error === %@", error);
                return;
            }
        }];
    }
}

#pragma mark - 设置写入权限
- (NSSet *)dataTypesToWrite {
    HKQuantityType *stepType = [HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount];
    return [NSSet setWithObjects:stepType, nil];
}

#pragma mark - 设置读取权限
- (NSSet *)dataTypesToRead {
    HKQuantityType *stepType = [HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount];
    return [NSSet setWithObjects:stepType, nil];
}

4.获取步数

#pragma mark - 获取步数 刷新界面
- (void)getStepsFromHealthKit{
    HKQuantityType *stepType = [HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount];
    [self fetchSumOfSamplesTodayForType:stepType unit:[HKUnit countUnit] completion:^(double stepCount, NSError *error) {
        dispatch_async(dispatch_get_main_queue(), ^{
            NSLog(@"你的步数为：%.f",stepCount);
        });
    }];
}

#pragma mark - 读取HealthKit数据
- (void)fetchSumOfSamplesTodayForType:(HKQuantityType *)quantityType unit:(HKUnit *)unit completion:(void (^)(double, NSError *))completionHandler {
    NSPredicate *predicate = [self predicateForSamplesToday];
    
    HKStatisticsQuery *query = [[HKStatisticsQuery alloc] initWithQuantityType:quantityType quantitySamplePredicate:predicate options:HKStatisticsOptionCumulativeSum completionHandler:^(HKStatisticsQuery *query, HKStatistics *result, NSError *error) {
        HKQuantity *sum = [result sumQuantity];
        if (completionHandler) {
            double value = [sum doubleValueForUnit:unit];
            completionHandler(value, error);
        }
    }];
    [self.healthStore executeQuery:query];
}

#pragma mark - NSPredicate数据模型
- (NSPredicate *)predicateForSamplesToday {
    NSCalendar *calendar = [NSCalendar currentCalendar];
    NSDate *now = [NSDate date];
    NSDate *startDate = [calendar startOfDayForDate:now];
    NSDate *endDate = [calendar dateByAddingUnit:NSCalendarUnitDay value:1 toDate:startDate options:0];
    return [HKQuery predicateForSamplesWithStartDate:startDate endDate:endDate options:HKQueryOptionStrictStartDate];
}

5.添加步数

#pragma mark - 添加步数
- (void)addstepWithStepNum:(double)stepNum {
    HKQuantitySample *stepCorrelationItem = [self stepCorrelationWithStepNum:stepNum];
    
    [self.healthStore saveObject:stepCorrelationItem withCompletion:^(BOOL success, NSError *error) {
        dispatch_async(dispatch_get_main_queue(), ^{
            if (success) {
                [self.view endEditing:YES];
                UIAlertView *doneAlertView = [[UIAlertView alloc] initWithTitle:@"提示" message:@"添加成功" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
                [doneAlertView show];
                //刷新数据  重新获取步数
                [self getStepsFromHealthKit];
            }else {
                NSLog(@"The error was: %@.", error);
                UIAlertView *doneAlertView = [[UIAlertView alloc] initWithTitle:@"提示" message:@"添加失败" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
                [doneAlertView show];
                return ;
            }
        });
    }];
}

#pragma Mark - 获取HKQuantitySample数据模型
- (HKQuantitySample *)stepCorrelationWithStepNum:(double)stepNum {
    NSDate *endDate = [NSDate date];
    NSDate *startDate = [NSDate dateWithTimeInterval:-300 sinceDate:endDate];
    
    HKQuantity *stepQuantityConsumed = [HKQuantity quantityWithUnit:[HKUnit countUnit] doubleValue:stepNum];
    HKQuantityType *stepConsumedType = [HKQuantityType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount];

    NSString *strName = [[UIDevice currentDevice] name];
    NSString *strModel = [[UIDevice currentDevice] model];
    NSString *strSysVersion = [[UIDevice currentDevice] systemVersion];
    NSString *localeIdentifier = [[NSLocale currentLocale] localeIdentifier];
    
    HKDevice *device = [[HKDevice alloc] initWithName:strName manufacturer:@"Apple" model:strModel hardwareVersion:strModel firmwareVersion:strModel softwareVersion:strSysVersion localIdentifier:localeIdentifier UDIDeviceIdentifier:localeIdentifier];
    
    HKQuantitySample *stepConsumedSample = [HKQuantitySample quantitySampleWithType:stepConsumedType quantity:stepQuantityConsumed startDate:startDate endDate:endDate device:device metadata:nil];
    
    return stepConsumedSample;
}

DEMO下载地址：http://download.csdn.net/detail/u014220518/9642988