no background execution on ios

[shehabmohamed0]

on ios when I start the task on foreground everything works fine
but when I goes into background nothing happen at all

after looking at the actual ios implementation for the BGTaskScheduler I found out that the registered BGRefresh operation do nothing except waiting 25 seconds

  private static func handleAppRefresh(task: BGAppRefreshTask) {
    let queue = OperationQueue()
    let operation = AppRefreshOperation()
    
    task.expirationHandler = {
      operation.cancel()
    }
    
    operation.completionBlock = {
      // Schedule a new refresh task
      scheduleAppRefresh()

      task.setTaskCompleted(success: true)
    }
    
    queue.addOperation(operation)
  }

class AppRefreshOperation: Operation {
  override func main() {
    let semaphore = DispatchSemaphore(value: 0)
    
    // avoid non-platform thread
    DispatchQueue.main.asyncAfter(deadline: .now() + 25) {
      semaphore.signal()
    }
    
    semaphore.wait()
  }
}