UserSetup

• Project has iOS 14 as minimum iOS version.
• I used MVVM pattern. Each view controller(UIViewController) has view model. View controller contains UI logic, view model contains business logic. View models can be covered by unit tests.
• All strings are placed in Localizable.strings
• All Images are placed in Images.xcassets
• All colors are placed in Colors.xcassets. It enable to change colors here for Light/Dark scheme.
• User height is a constant because Height screen is absent (heightInMeters = 1.7)

Architecture notes

• All data entered by the user is accumulated in the User class which is stored in the UserDefaults.
• Each screen first loads user data (User) and saves it before navigating to the next screen.

Not finished

• Use Localizable.stringsdict for plural forms (pound/pounds, kilogam/kilograms)
• Keyboard processing (show/hide scrolling)
• Writing unit tests for view models
• Use HealthKit for getting Weight/ DOB/ Height:
  • Add HealthKit capability
  • Use HKHealthStore class
  • Check if HealthKit available on the device:

       HKHealthStore.isHealthDataAvailable()

• healthStore.requestAuthorization(), process error
• Get date of birth:

       let dateOfBirth = try healthStore.dateOfBirthComponents()

• Get gender:

       let gender = try healthStore.biologicalSex()

• Get weight, process error:

       let weightType = HKSampleType.quantityType (forIdentifier: HKQuantityTypeIdentifier.bodyMass)!
       let queryWeight = HKSampleQuery(sampleType: weightType, predicate: nil, limit: HKObjectQueryNoLimit, sortDescriptors: nil)

• Get height, process error:

       let heightType = HKSampleType.quantityType(forIdentifier: HKQuantityTypeIdentifier.height)!
       let queryHeight = HKSampleQuery(sampleType: heightType, predicate: nil, limit: HKObjectQueryNoLimit, sortDescriptors: nil)