How get Steps from Apple health kit in swift

First of all add HealthKit on Capability in project singing & Capability

    static func retrieveStepCount(today:Date, yesterDay: Date,completion: @escaping(Double?,Error?) -> ()) {
        
           let inputFormatter = DateFormatter()
           inputFormatter.dateFormat = "dd/MM/yyyy"
           
           //   Define the Step Quantity Type
           let stepsCount = HKQuantityType.quantityType(forIdentifier: HKQuantityTypeIdentifier.stepCount)
           
           //  Set the Predicates & Interval
           let predicate = HKQuery.predicateForSamples(withStart: today.startOfDay , end: today.endOfDay, options: .strictStartDate)
           var interval = DateComponents()
           interval.day = 1
           //print(predicate)
           
           let query = HKStatisticsQuery(quantityType: stepsCount!, quantitySamplePredicate: predicate, options: HKStatisticsOptions.cumulativeSum) { (query, result, error) in

               var resultCount = 0.0
               if error != nil {
                   completion(nil, error)
                   return
               }
               
               if let myResult = result {
                   if let sum = myResult.sumQuantity() {
                       print(sum)
                       resultCount = sum.doubleValue(for: HKUnit.count())
                   }
                   
                   DispatchQueue.main.async {
                       completion(resultCount, nil)
                   }
               }
           }
           HKHealthStore().execute(query)
       }

Call above function and get steps

 let startDate = Date().startOfDay
 let yesterDay = Date().endOfDay

self.retrieveStepCount(today: startDate, yesterDay: yesterDay) { (steps, error) in
            print(error?.localizedDescription)
            
            if error == nil {
                
                print("Health kit Walked steps  \(steps ?? 0)")
            }
}