Healthstore read only in objective-C ?

I've tried the following code using Xcode 16.2 (16C5032a) + iOS 18.3.1, and confirmed the issue doesn't happen to me:

NSSet *readTypes = [NSSet setWithObject:[HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount]];
[healthKitStore requestAuthorizationToShareTypes:nil readTypes:readTypes completion:^(BOOL success, NSError * _Nullable error) {
    NSLog(@"%@", error);
}];

I did see the same crash if readTypes is nil or an empty set, which makes sense. If you try the same thing and the crash is still there, I'd be interested in looking into your project.

Best,
——
Ziqiao Chen
 Worldwide Developer Relations.

My Init code is simple : if I Set like This I have a crash.

- (void) init_healthkit {
        ALERTE_HEALTH = @"" ;
    self.healthStore = [[HKHealthStore alloc] init];
    if ([HKHealthStore isHealthDataAvailable]) {
        
        NSLog(@"Healthkit available ");
        NSSet *writeDataTypes = [self dataTypesToWrite];
        NSSet *readDataTypes = [self dataTypesToRead];
        
        [self.healthStore requestAuthorizationToShareTypes:nil readTypes:readDataTypes completion:^(BOOL success, NSError *error) {
            if (!success) {
                NSLog(@"You didn't allow HealthKit to access these read data types. In your app, try to handle this error gracefully when a user decides not to provide access. The error was: %@. If you're using a simulator, try it on a device.", error);
                HEALTHKIT =@"N" ;
                return;
            }
            
            NSLog(@"Healthkit OK read/write ");
            dispatch_async(dispatch_get_main_queue(), ^{
                // Update the user interface based on the current user's health information.
                NSLog(@"Healthkit OK");
              
                HEALTHKIT = @"Y" ;
            });
        }];
    }
    
    
}

The code doesn't seem different from mine, except that it doesn't show what [self dataTypesToRead] is...

Do you try with the same testing environment I mentioned, which is Xcode 16.2 (16C5032a) + iOS 18.3.1? If yes and the crash still happens, maybe you can provide a minimal project for me to reproduce the issue. Your post can contain a link to where your test project is hosted.

Best,
——
Ziqiao Chen
 Worldwide Developer Relations.

they are initialized :

• (NSSet *)dataTypesToRead {

  HKCharacteristicType *distanceWalkingRunning = [HKObjectType characteristicTypeForIdentifier:HKQuantityTypeIdentifierDistanceWalkingRunning] ; HKCharacteristicType *StepCount = [HKSampleType characteristicTypeForIdentifier:HKQuantityTypeIdentifierStepCount]; HKCharacteristicType *cycleCount = [HKSampleType characteristicTypeForIdentifier:HKQuantityTypeIdentifierDistanceCycling]; return [NSSet setWithObjects: distanceWalkingRunning, StepCount,cycleCount , nil];

}

It's working. It ask for Steps and nothing else . I dont know what was bad , but tank you !