iOS HealthKit get unit

[erdinc27]

I pull many data from HealthKit including nutritious, workouts, body mass, weight, height. I can get them all without any problem but what I want to do is to get those data's units as well. For example, if the user uses height property in meter or the inch or any other metric unit. I am doing in this way

lastHeight = [quantity doubleValueForUnit:[HKUnit meterUnit]];

it gives the right height number but if the user uses in inch unit I still display it in meters. How can I pull units as well for the appropriate property?

 

[chown33]

See here:
https://developer.apple.com/documen...hstore/1614172-preferredunitsforquantitytypes

Found using search terms
healthkit default units
healthkit preferred units

 

[erdinc27]

@chown33 thanks for the reply. I implemented the code now but it hits always error clause. I think it occurs because of the permission. How can I get permission from the user? Here how the code looks like

- (void) getHeightUnitWithHander:(void (^)(BOOL isSuccessful, NSString *errorText, HKQuantity *heightUnit)) handler {
    
    NSSet *heightSet = [NSSet setWithObject:HKQuantityTypeIdentifierHeight];
    [self.healthStore preferredUnitsForQuantityTypes:heightSet completion:^(NSDictionary<HKQuantityType *,HKUnit *> *preferredUnits, NSError *error) {
        
        if (error) {
            NSLog(@"Error Unit %@", error.description);
        } else {
            NSLog(@"HEIGHT UNİTS %@", preferredUnits);
        }
    }];
}