ใครเขียน swift IOS ช่วยเข้ามาช่วยแก้ Fatal error: Index out of range [IOS Swift 5.1]

http://xxx.xxx.xxx.xx/ProjectService/PODService.svc/GetPlanDate/2
pplandateCategories ==>["20190826", "20190827"]

http://xxx.xxx.xxx.xx/ProjectService/PODService.svc/GetShipment/2/20190827
getpShipmentDCPlanData ==>["4505023244", "4505023274"]

func numberOfComponents(in pickerView: UIPickerView) -> Int {
      return 2
    }
    
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        if component == 0 {
            return pPlandateCategories.count
        }else{
            let selected = pickerview.selectedRow(inComponent:0)
           return pShipmentCategories[selected].count    ———>. Thread 1: Fatal error: Index out of range 
        }
    }
    
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        if component == 0 {
            return pPlandateCategories[row]
        }else{
            let selected = pickerview.selectedRow(inComponent:0)
            return pShipmentCategories[selected][row]
        }
    }
    
    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        if component == 0{
            pickerview.reloadComponent(1)
            
        }else{
            let selected = pickerview.selectedRow(inComponent:0)
            someTextField.text = "Shipment:" + " " + pShipmentCategories[selected][row]
        }
    }