Handle AppleWatch Request For Authorization on iPhone

HealthKit.AppleWatch.iPhone.swift

@UIApplicationMain 
class AppDelegate: UIResponder, UIApplicationDelegate 
{ 
  ... 
  func applicationShouldRequestHealthAuthorization(_ application: UIApplication) { 
    let healthStore = HKHealthStore() 
    healthStore.handleAuthorizationForExtension { 
      (success, error) -> Void in 
    } 
  } 
}