Access Data step count from Health app of Apple - ios

Question

I would like to show in my app a label of my step count
The data step count will be take from the health app of apple but i don't know if will be possible
how i can print the value of my step count in a label ?
This is my code
Thanks
#import "ViewController.h"
#import HealthKit;
#interface ViewController ()
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
if(NSClassFromString(#"HKHealthStore") && [HKHealthStore isHealthDataAvailable])
{
HKHealthStore *healthStore = [[HKHealthStore alloc] init];
NSSet *shareObjectTypes = [NSSet setWithObjects:
[HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierBodyMass],
[HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierHeight],
nil];
NSSet *readObjectTypes = [NSSet setWithObjects:
[HKObjectType characteristicTypeForIdentifier:HKCharacteristicTypeIdentifierDateOfBirth],
[HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount],
nil];
[healthStore requestAuthorizationToShareTypes:shareObjectTypes
readTypes:readObjectTypes
completion:^(BOOL success, NSError *error) {
if(success == YES)
{
// Set your start and end date for your query of interest
NSDate *startDate, *endDate;
// Use the sample type for step count
HKSampleType *sampleType = [HKSampleType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount];
_stepLabel.text = [NSString stringWithFormat:#"%#",HKQuantityTypeIdentifierStepCount];
// Create a predicate to set start/end date bounds of the query
NSPredicate *predicate = [HKQuery predicateForSamplesWithStartDate:startDate endDate:endDate options:HKQueryOptionStrictStartDate];
// Create a sort descriptor for sorting by start date
NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:HKSampleSortIdentifierStartDate ascending:YES];
HKSampleQuery *sampleQuery = [[HKSampleQuery alloc] initWithSampleType:sampleType
predicate:predicate
limit:HKObjectQueryNoLimit
sortDescriptors:#[sortDescriptor]
resultsHandler:^(HKSampleQuery *query, NSArray *results, NSError *error) {
NSLog(#"%# ", results);
if(!error && results)
{
for(HKQuantitySample *samples in results)
{
// your code here
}
}
}];
// Execute the query
[healthStore executeQuery:sampleQuery]; }
else
{
// Determine if it was an error or if the
// user just canceld the authorization request
}
}];
}}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end

Answer 1

Yes, you can read the step count from HealthKit if the user grants permission for your app to do so.
See the HealthKit documentation:
https://developer.apple.com/library/ios/documentation/HealthKit/Reference/HealthKit_Framework/index.html#//apple_ref/doc/uid/TP40014707