Setting up a Health Store with Authorization from User

ios-healthkit-healthstore-objc

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

@interface ViewController ()

@property (nonatomic, strong) HKHealthStore *healthStore;

@end


@implementation ViewController

- (void)viewDidLoad {
    
    [super viewDidLoad];
    
    [self initializeHealthStoreWithAuthorization];
}

- (void)initializeHealthStoreWithAuthorization {
    
    if([HKHealthStore isHealthDataAvailable]) {
        
        self.healthStore = [[HKHealthStore alloc] init];
        
        NSSet *writeDataTypes = [self dataTypesToWrite];
        
        NSSet *readDataTypes = [self dataTypesToRead];
        
        [self.healthStore requestAuthorizationToShareTypes:writeDataTypes readTypes:readDataTypes completion:^(BOOL success, NSError *error) {
            
            if(error) {
                
                NSLog(@"%@", error);
            
            } else {
                
                NSLog(@"Success is %d", success);
            }
        }];
    }
}

- (NSSet *)dataTypesToWrite {

    HKQuantityType *bodyMass = [HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierBodyMass];
    HKQuantityType *distanceCycling = [HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierDistanceCycling];
    
    return [NSSet setWithObjects:bodyMass, distanceCycling, nil];
}

- (NSSet *)dataTypesToRead {
    
    HKQuantityType *bodyMass = [HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierBodyMass];
    HKQuantityType *distanceCycling = [HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierDistanceCycling];
    
    return [NSSet setWithObjects:bodyMass, distanceCycling, nil];
}

@end