question:thats is the main native code import UIKit protocol DiscoveryViewDelegate { func discoveryView(_ sendor:DiscoveryViewController, onSelectPrinterTarget target:String) } class DiscoveryViewController: UIViewController, UITableViewDataSource, UITableViewDelegate, Epos2DiscoveryDelegate { @IBOutlet weak var printerView: UITableView! fileprivate var printerList: [Epos2DeviceInfo] = [] fileprivate var filterOption: Epos2FilterOption = Epos2FilterOption() var delegate: DiscoveryViewDelegate? override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. filterOption.deviceType = EPOS2_TYPE_PRINTER.rawValue printerView.delegate = self printerView.dataSource = self } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } override func viewDidAppear(_ animated: Bool) { super.viewDidAppear(animated) let result = Epos2Discovery.start(filterOption, delegate: self) if result != EPOS2_SUCCESS.rawValue { //ShowMsg showErrorEpos(result, method: "start") } printerView.reloadData() } override func viewWillDisappear(_ animated: Bool) { super.viewWillDisappear(animated) while Epos2Discovery.stop() == EPOS2_ERR_PROCESSING.rawValue { // retry stop function } printerList.removeAll() } func numberOfSections(in tableView: UITableView) -> Int { return 2 } func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { var rowNumber: Int = 0 if section == 0 { rowNumber = printerList.count } else { rowNumber = 1 } return rowNumber } func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let identifier = "basis-cell" var cell: UITableViewCell? = tableView.dequeueReusableCell(withIdentifier: identifier) if cell == nil { cell = UITableViewCell(style: UITableViewCell.CellStyle.subtitle, reuseIdentifier: identifier) } if indexPath.section == 0 { if indexPath.row >= 0 && indexPath.row < printerList.count { cell!.textLabel?.text = printerList[indexPath.row].deviceName cell!.detailTextLabel?.text = printerList[indexPath.row].target } } else { cell!.textLabel?.text = "other..." cell!.detailTextLabel?.text = "" } return cell! } func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { if indexPath.section == 0 { if delegate != nil { delegate!.discoveryView(self, onSelectPrinterTarget: printerList[indexPath.row].target) delegate = nil navigationController?.popToRootViewController(animated: true) } } else { performSelector(onMainThread: #selector(DiscoveryViewController.connectDevice), with:self, waitUntilDone:false) } } @objc func connectDevice() { Epos2Discovery.stop() printerList.removeAll() let btConnection = Epos2BluetoothConnection() let BDAddress = NSMutableString() let result = btConnection?.connectDevice(BDAddress) if result == EPOS2_SUCCESS.rawValue { delegate?.discoveryView(self, onSelectPrinterTarget: BDAddress as String) delegate = nil self.navigationController?.popToRootViewController(animated: true) } else { Epos2Discovery.start(filterOption, delegate:self) printerView.reloadData() } } @IBAction func restartDiscovery(_ sender: AnyObject) { var result = EPOS2_SUCCESS.rawValue; while true { result = Epos2Discovery.stop() if result != EPOS2_ERR_PROCESSING.rawValue { if (result == EPOS2_SUCCESS.rawValue) { break; } else { MessageView.showErrorEpos(result, method:"stop") return; } } } printerList.removeAll() printerView.reloadData() result = Epos2Discovery.start(filterOption, delegate:self) if result != EPOS2_SUCCESS.rawValue { MessageView.showErrorEpos(result, method:"start") } } func onDiscovery(_ deviceInfo: Epos2DeviceInfo!) { printerList.append(deviceInfo) printerView.reloadData() } } import UIKit class ViewController: UIViewController, DiscoveryViewDelegate, CustomPickerViewDelegate, Epos2PtrReceiveDelegate { let PAGE_AREA_HEIGHT: Int = 500 let PAGE_AREA_WIDTH: Int = 500 let FONT_A_HEIGHT: Int = 24 let FONT_A_WIDTH: Int = 12 let BARCODE_HEIGHT_POS: Int = 70 let BARCODE_WIDTH_POS: Int = 110 @IBOutlet weak var buttonDiscovery: UIButton! @IBOutlet weak var buttonLang: UIButton! @IBOutlet weak var buttonPrinterSeries: UIButton! @IBOutlet weak var buttonReceipt: UIButton! @IBOutlet weak var buttonCoupon: UIButton! @IBOutlet weak var textWarnings: UITextView! @IBOutlet weak var textTarget: UITextField! var printerList: CustomPickerDataSource? var langList: CustomPickerDataSource? var printerPicker: CustomPickerView? var langPicker: CustomPickerView? var printer: Epos2Printer? var valuePrinterSeries: Epos2PrinterSeries = EPOS2_TM_M10 var valuePrinterModel: Epos2ModelLang = EPOS2_MODEL_ANK var target: String? override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. printerList = CustomPickerDataSource() printerList!.addItem(NSLocalizedString("printerseries_m10", comment:""), value: EPOS2_TM_M10) printerList!.addItem(NSLocalizedString("printerseries_m30", comment:""), value: EPOS2_TM_M30) printerList!.addItem(NSLocalizedString("printerseries_p20", comment:""), value: EPOS2_TM_P20) printerList!.addItem(NSLocalizedString("printerseries_p60", comment:""), value: EPOS2_TM_P60) printerList!.addItem(NSLocalizedString("printerseries_p60ii", comment:""), value: EPOS2_TM_P60II) printerList!.addItem(NSLocalizedString("printerseries_p80", comment:""), value: EPOS2_TM_P80) printerList!.addItem(NSLocalizedString("printerseries_t20", comment:""), value: EPOS2_TM_T20) printerList!.addItem(NSLocalizedString("printerseries_t60", comment:""), value: EPOS2_TM_T60) printerList!.addItem(NSLocalizedString("printerseries_t70", comment:""), value: EPOS2_TM_T70) printerList!.addItem(NSLocalizedString("printerseries_t81", comment:""), value: EPOS2_TM_T81) printerList!.addItem(NSLocalizedString("printerseries_t82", comment:""), value: EPOS2_TM_T82) printerList!.addItem(NSLocalizedString("printerseries_t83", comment:""), value: EPOS2_TM_T83) printerList!.addItem(NSLocalizedString("printerseries_t83iii", comment:""), value: EPOS2_TM_T83III) printerList!.addItem(NSLocalizedString("printerseries_t88", comment:""), value: EPOS2_TM_T88) printerList!.addItem(NSLocalizedString("printerseries_t90", comment:""), value: EPOS2_TM_T90) printerList!.addItem(NSLocalizedString("printerseries_t90kp", comment:""), value: EPOS2_TM_T90KP) printerList!.addItem(NSLocalizedString("printerseries_t100", comment:""), value: EPOS2_TM_T100) printerList!.addItem(NSLocalizedString("printerseries_u220", comment:""), value: EPOS2_TM_U220) printerList!.addItem(NSLocalizedString("printerseries_u330", comment:""), value: EPOS2_TM_U330) printerList!.addItem(NSLocalizedString("printerseries_l90", comment:""), value: EPOS2_TM_L90) printerList!.addItem(NSLocalizedString("printerseries_h6000", comment:""), value: EPOS2_TM_H6000) printerList!.addItem(NSLocalizedString("printerseries_m30ii", comment:""), value: EPOS2_TM_M30II) printerList!.addItem(NSLocalizedString("printerseries_ts100", comment:""), value: EPOS2_TS_100) printerList!.addItem(NSLocalizedString("printerseries_m50", comment:""), value: EPOS2_TM_M50) printerList!.addItem(NSLocalizedString("printerseries_t88vii", comment:""), value: EPOS2_TM_T88VII) printerList!.addItem(NSLocalizedString("printerseries_l90lfc", comment:""), value: EPOS2_TM_L90LFC) printerList!.addItem(NSLocalizedString("printerseries_l100", comment:""), value: EPOS2_TM_L100) printerList!.addItem(NSLocalizedString("printerseries_p20ii", comment:""), value: EPOS2_TM_P20II) printerList!.addItem(NSLocalizedString("printerseries_p80ii", comment:""), value: EPOS2_TM_P80II) printerList!.addItem(NSLocalizedString("printerseries_m30iii", comment:""), value: EPOS2_TM_M30III) printerList!.addItem(NSLocalizedString("printerseries_m50ii", comment:""), value: EPOS2_TM_M50II) printerList!.addItem(NSLocalizedString("printerseries_m55", comment:""), value: EPOS2_TM_M55) langList = CustomPickerDataSource() langList!.addItem(NSLocalizedString("language_ank", comment:""), value: EPOS2_MODEL_ANK) langList!.addItem(NSLocalizedString("language_japanese", comment:""), value: EPOS2_MODEL_JAPANESE) langList!.addItem(NSLocalizedString("language_chinese", comment:""), value: EPOS2_MODEL_CHINESE) langList!.addItem(NSLocalizedString("language_taiwan", comment:""), value: EPOS2_MODEL_TAIWAN) langList!.addItem(NSLocalizedString("language_korean", comment:""), value: EPOS2_MODEL_KOREAN) langList!.addItem(NSLocalizedString("language_thai", comment:""), value: EPOS2_MODEL_THAI) langList!.addItem(NSLocalizedString("language_southasia", comment:""), value: EPOS2_MODEL_SOUTHASIA) printerPicker = CustomPickerView() langPicker = CustomPickerView() let window = UIApplication.shared.keyWindow if (window != nil) { window!.addSubview(printerPicker!) window!.addSubview(langPicker!) } else{ self.view.addSubview(printerPicker!) self.view.addSubview(langPicker!) } printerPicker!.delegate = self langPicker!.delegate = self printerPicker!.dataSource = printerList langPicker!.dataSource = langList valuePrinterSeries = printerList!.valueItem(0) as! Epos2PrinterSeries buttonPrinterSeries.setTitle(printerList!.textItem(0), for:UIControl.State()) valuePrinterModel = langList!.valueItem(0) as! Epos2ModelLang buttonLang.setTitle(langList!.textItem(0), for:UIControl.State()) setDoneToolbar() let result = Epos2Log.setLogSettings(EPOS2_PERIOD_TEMPORARY.rawValue, output: EPOS2_OUTPUT_STORAGE.rawValue, ipAddress:nil, port:0, logSize:1, logLevel:EPOS2_LOGLEVEL_LOW.rawValue) if result != EPOS2_SUCCESS.rawValue { MessageView.showErrorEpos(result, method: "setLogSettings") } } override func viewDidAppear(_ animated: Bool) { super.viewDidAppear(animated) initializePrinterObject() target = textTarget.text } override func viewWillDisappear(_ animated: Bool) { super.viewWillDisappear(animated) finalizePrinterObject() } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } func setDoneToolbar() { let doneToolbar = UIToolbar(frame: CGRect(x: 0, y: 0, width: self.view.frame.size.width, height: 44)) doneToolbar.barStyle = UIBarStyle.blackTranslucent doneToolbar.sizeToFit() let space = UIBarButtonItem(barButtonSystemItem:UIBarButtonItem.SystemItem.flexibleSpace, target:self, action:nil) let doneButton = UIBarButtonItem(barButtonSystemItem:UIBarButtonItem.SystemItem.done, target:self, action:#selector(ViewController.doneKeyboard(_:))) doneToolbar.setItems([space, doneButton], animated:true) textTarget.inputAccessoryView = doneToolbar } @objc func doneKeyboard(_ sender: AnyObject) { textTarget.resignFirstResponder() target = textTarget.text } @IBAction func didTouchUpInside(_ sender: AnyObject) { textTarget.resignFirstResponder() switch sender.tag { case 1: printerPicker!.showPicker() case 2: langPicker!.showPicker() case 3: showIndicator(NSLocalizedString("wait", comment:"")); textWarnings.text = "" let queue = OperationQueue() queue.addOperation({ [self] in if !runPrinterReceiptSequence() { hideIndicator(); } }) break case 4: showIndicator(NSLocalizedString("wait", comment:"")); textWarnings.text = "" let queue = OperationQueue() queue.addOperation({ [self] in if !runPrinterCouponSequence() { hideIndicator(); } }) break default: break } } func customPickerView(_ pickerView: CustomPickerView, didSelectItem text: String, itemValue value: Any) { if pickerView == printerPicker { self.buttonPrinterSeries.setTitle(text, for:UIControl.State()) self.valuePrinterSeries = value as! Epos2PrinterSeries } if pickerView == langPicker { self.buttonLang.setTitle(text, for:UIControl.State()) self.valuePrinterModel = value as! Epos2ModelLang } finalizePrinterObject() initializePrinterObject() } func runPrinterReceiptSequence() -> Bool { if !createReceiptData() { return false } if !printData() { return false } return true } func runPrinterCouponSequence() -> Bool { if !createCouponData() { return false } if !printData() { return false } return true } func createReceiptData() -> Bool { let barcodeWidth = 2 let barcodeHeight = 100 var result = EPOS2_SUCCESS.rawValue let textData: NSMutableString = NSMutableString() let logoData = UIImage(named: "store.png") if logoData == nil { return false } result = printer!.addTextAlign(EPOS2_ALIGN_CENTER.rawValue) if result != EPOS2_SUCCESS.rawValue { MessageView.showErrorEpos(result, method:"addTextAlign") return false; } result = printer!.add(logoData, x: 0, y:0, width:Int(logoData!.size.width), height:Int(logoData!.size.height), color:EPOS2_COLOR_1.rawValue, mode:EPOS2_MODE_MONO.rawValue, halftone:EPOS2_HALFTONE_DITHER.rawValue, brightness:Double(EPOS2_PARAM_DEFAULT), compress:EPOS2_COMPRESS_AUTO.rawValue) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addImage") return false } // Section 1 : Store information result = printer!.addFeedLine(1) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addFeedLine") return false } textData.append("THE STORE 123 (555) 555 – 5555n") textData.append("STORE DIRECTOR – John Smithn") textData.append("n") textData.append("7/01/07 16:58 6153 05 0191 134n") textData.append("ST# 21 OP# 001 TE# 01 TR# 747n") textData.append("------------------------------n") result = printer!.addText(textData as String) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addText") return false; } textData.setString("") // Section 2 : Purchaced items textData.append("400 OHEIDA 3PK SPRINGF 9.99 Rn") textData.append("410 3 CUP BLK TEAPOT 9.99 Rn") textData.append("445 EMERIL GRIDDLE/PAN 17.99 Rn") textData.append("438 CANDYMAKER ASSORT 4.99 Rn") textData.append("474 TRIPOD 8.99 Rn") textData.append("433 BLK LOGO PRNTED ZO 7.99 Rn") textData.append("458 AQUA MICROTERRY SC 6.99 Rn") textData.append("493 30L BLK FF DRESS 16.99 Rn") textData.append("407 LEVITATING DESKTOP 7.99 Rn") textData.append("441 **Blue Overprint P 2.99 Rn") textData.append("476 REPOSE 4PCPM CHOC 5.49 Rn") textData.append("461 WESTGATE BLACK 25 59.99 Rn") textData.append("------------------------------n") result = printer!.addText(textData as String) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addText") return false; } textData.setString("") // Section 3 : Payment infomation textData.append("SUBTOTAL 160.38n"); textData.append("TAX 14.43n"); result = printer!.addText(textData as String) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addText") return false } textData.setString("") result = printer!.addTextSize(2, height:2) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addTextSize") return false } result = printer!.addText("TOTAL 174.81n") if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addText") return false; } result = printer!.addTextSize(1, height:1) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addTextSize") return false; } result = printer!.addFeedLine(1) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addFeedLine") return false; } textData.append("CASH 200.00n") textData.append("CHANGE 25.19n") textData.append("------------------------------n") result = printer!.addText(textData as String) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addText") return false } textData.setString("") // Section 4 : Advertisement textData.append("Purchased item total numbern") textData.append("Sign Up and Save !n") textData.append("With Preferred Saving Cardn") result = printer!.addText(textData as String) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addText") return false; } textData.setString("") result = printer!.addFeedLine(2) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addFeedLine") return false } result = printer!.addBarcode("01209457", type:EPOS2_BARCODE_CODE39.rawValue, hri:EPOS2_HRI_BELOW.rawValue, font:EPOS2_FONT_A.rawValue, width:barcodeWidth, height:barcodeHeight) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addBarcode") return false } result = printer!.addCut(EPOS2_CUT_FEED.rawValue) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addCut") return false } return true } func createCouponData() -> Bool { let barcodeWidth = 2 let barcodeHeight = 64 var result = EPOS2_SUCCESS.rawValue if printer == nil { return false } let coffeeData = UIImage(named: "coffee.png") let wmarkData = UIImage(named: "wmark.png") if coffeeData == nil || wmarkData == nil { return false } result = printer!.add(wmarkData, x:0, y:0, width:Int(wmarkData!.size.width), height:Int(wmarkData!.size.height), color:EPOS2_PARAM_DEFAULT, mode:EPOS2_PARAM_DEFAULT, halftone:EPOS2_PARAM_DEFAULT, brightness:Double(EPOS2_PARAM_DEFAULT), compress:EPOS2_PARAM_DEFAULT) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addImage") return false } result = printer!.add(coffeeData, x:0, y:0, width:Int(coffeeData!.size.width), height:Int(coffeeData!.size.height), color:EPOS2_PARAM_DEFAULT, mode:EPOS2_PARAM_DEFAULT, halftone:EPOS2_PARAM_DEFAULT, brightness:3, compress:EPOS2_PARAM_DEFAULT) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addImage") return false } result = printer!.addBarcode("01234567890", type:EPOS2_BARCODE_UPC_A.rawValue, hri:EPOS2_PARAM_DEFAULT, font: EPOS2_PARAM_DEFAULT, width:barcodeWidth, height:barcodeHeight) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addBarcode") return false } result = printer!.addCut(EPOS2_CUT_FEED.rawValue) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"addCut") return false } return true } func printData() -> Bool { if printer == nil { return false } if !connectPrinter() { printer!.clearCommandBuffer() return false } let result = printer!.sendData(Int(EPOS2_PARAM_DEFAULT)) if result != EPOS2_SUCCESS.rawValue { printer!.clearCommandBuffer() MessageView.showErrorEpos(result, method:"sendData") printer!.disconnect() return false } return true } @discardableResult func initializePrinterObject() -> Bool { printer = Epos2Printer(printerSeries: valuePrinterSeries.rawValue, lang: valuePrinterModel.rawValue) if printer == nil { return false } printer!.setReceiveEventDelegate(self) return true } func finalizePrinterObject() { if printer == nil { return } printer!.setReceiveEventDelegate(nil) printer = nil } func connectPrinter() -> Bool { var result: Int32 = EPOS2_SUCCESS.rawValue if printer == nil { return false } //Note: This API must be used from background thread only result = printer!.connect(target, timeout:Int(EPOS2_PARAM_DEFAULT)) if result != EPOS2_SUCCESS.rawValue { MessageView.showErrorEpos(result, method:"connect") return false } return true } func disconnectPrinter() { var result: Int32 = EPOS2_SUCCESS.rawValue if printer == nil { return } //Note: This API must be used from background thread only result = printer!.disconnect() if result != EPOS2_SUCCESS.rawValue { DispatchQueue.main.async(execute: { MessageView.showErrorEpos(result, method:"disconnect") }) } printer!.clearCommandBuffer() } func onPtrReceive(_ printerObj: Epos2Printer!, code: Int32, status: Epos2PrinterStatusInfo!, printJobId: String!) { let queue = OperationQueue() queue.addOperation({ [self] in self.disconnectPrinter() self.hideIndicator(); MessageView.showResult(code, errMessage: makeErrorMessage(status)) dispPrinterWarnings(status) }) } func dispPrinterWarnings(_ status: Epos2PrinterStatusInfo?) { if status == nil { return } OperationQueue.main.addOperation({ [self] in textWarnings.text = "" }) let wanringMsg = NSMutableString() if status!.paper == EPOS2_PAPER_NEAR_END.rawValue { wanringMsg.append(NSLocalizedString("warn_receipt_near_end", comment:"")) } if status!.batteryLevel == EPOS2_BATTERY_LEVEL_1.rawValue { wanringMsg.append(NSLocalizedString("warn_battery_near_end", comment:"")) } if status!.paperTakenSensor == EPOS2_REMOVAL_DETECT_PAPER.rawValue { wanringMsg.append(NSLocalizedString("warn_detect_paper", comment:"")) } if status!.paperTakenSensor == EPOS2_REMOVAL_DETECT_UNKNOWN.rawValue { wanringMsg.append(NSLocalizedString("warn_detect_unknown", comment:"")) } OperationQueue.main.addOperation({ [self] in textWarnings.text = wanringMsg as String }) } func makeErrorMessage(_ status: Epos2PrinterStatusInfo?) -> String { let errMsg = NSMutableString() if status == nil { return "" } if status!.online == EPOS2_FALSE { errMsg.append(NSLocalizedString("err_offline", comment:"")) } if status!.connection == EPOS2_FALSE { errMsg.append(NSLocalizedString("err_no_response", comment:"")) } if status!.coverOpen == EPOS2_TRUE { errMsg.append(NSLocalizedString("err_cover_open", comment:"")) } if status!.paper == EPOS2_PAPER_EMPTY.rawValue { errMsg.append(NSLocalizedString("err_receipt_end", comment:"")) } if status!.paperFeed == EPOS2_TRUE || status!.panelSwitch == EPOS2_SWITCH_ON.rawValue { errMsg.append(NSLocalizedString("err_paper_feed", comment:"")) } if status!.errorStatus == EPOS2_MECHANICAL_ERR.rawValue || status!.errorStatus == EPOS2_AUTOCUTTER_ERR.rawValue { errMsg.append(NSLocalizedString("err_autocutter", comment:"")) errMsg.append(NSLocalizedString("err_need_recover", comment:"")) } if status!.errorStatus == EPOS2_UNRECOVER_ERR.rawValue { errMsg.append(NSLocalizedString("err_unrecover", comment:"")) } if status!.errorStatus == EPOS2_AUTORECOVER_ERR.rawValue { if status!.autoRecoverError == EPOS2_HEAD_OVERHEAT.rawValue { errMsg.append(NSLocalizedString("err_overheat", comment:"")) errMsg.append(NSLocalizedString("err_head", comment:"")) } if status!.autoRecoverError == EPOS2_MOTOR_OVERHEAT.rawValue { errMsg.append(NSLocalizedString("err_overheat", comment:"")) errMsg.append(NSLocalizedString("err_motor", comment:"")) } if status!.autoRecoverError == EPOS2_BATTERY_OVERHEAT.rawValue { errMsg.append(NSLocalizedString("err_overheat", comment:"")) errMsg.append(NSLocalizedString("err_battery", comment:"")) } if status!.autoRecoverError == EPOS2_WRONG_PAPER.rawValue { errMsg.append(NSLocalizedString("err_wrong_paper", comment:"")) } } if status!.batteryLevel == EPOS2_BATTERY_LEVEL_0.rawValue { errMsg.append(NSLocalizedString("err_battery_real_end", comment:"")) } if (status!.removalWaiting == EPOS2_REMOVAL_WAIT_PAPER.rawValue) { errMsg.append(NSLocalizedString("err_wait_removal", comment:"")) } if (status!.unrecoverError == EPOS2_HIGH_VOLTAGE_ERR.rawValue || status!.unrecoverError == EPOS2_LOW_VOLTAGE_ERR.rawValue) { errMsg.append(NSLocalizedString("err_voltage", comment:"")); } return errMsg as String } override func prepare(for segue: UIStoryboardSegue, sender: Any?) { if segue.identifier == "DiscoveryView" { let view: DiscoveryViewController? = segue.destination as? DiscoveryViewController view?.delegate = self } } func discoveryView(_ sendor: DiscoveryViewController, onSelectPrinterTarget target: String) { textTarget.text = target } } and that what i did with dart import Flutter class EpsonManager: NSObject { private var timeout: Float = 5000 private var printer: Epos2Printer? = nil private var isConnected: Bool = false private var target: String? private let filterOption: Epos2FilterOption = { let filter = Epos2FilterOption() filter.deviceType = EPOS2_TYPE_PRINTER.rawValue filter.deviceModel = EPOS2_MODEL_ALL.rawValue return filter }() private let disconnectInterval: Float = 500 private var printerList:[[String:Any]] = [] private var bluetoothTarget: NSMutableString = NSMutableString() private let pairingPrinter = Epos2BluetoothConnection() func setTimeout(_ timeout: Float) { self.timeout = timeout } func constants() -> [String: Any] { let record = [ // Printer series "SERIES_TM_M10": EPOS2_TM_M10, "SERIES_TM_M30": EPOS2_TM_M30, "SERIES_TM_M30II": EPOS2_TM_M30II, "SERIES_TM_M30III": EPOS2_TM_M30III, "SERIES_TM_P20": EPOS2_TM_P20, "SERIES_TM_P60": EPOS2_TM_P60, "SERIES_TM_P60II": EPOS2_TM_P60II, "SERIES_TM_P80": EPOS2_TM_P80, "SERIES_TM_T20": EPOS2_TM_T20, "SERIES_TM_T60": EPOS2_TM_T60, "SERIES_TM_T70": EPOS2_TM_T70, "SERIES_TM_T81": EPOS2_TM_T81, "SERIES_TM_T82": EPOS2_TM_T82, "SERIES_TM_T83": EPOS2_TM_T83, "SERIES_TM_T88": EPOS2_TM_T88, "SERIES_TM_T90": EPOS2_TM_T90, "SERIES_TM_T90KP": EPOS2_TM_T90KP, "SERIES_TM_U220": EPOS2_TM_U220, "SERIES_TM_U330": EPOS2_TM_U330, "SERIES_TM_L90": EPOS2_TM_L90, "SERIES_TM_H6000": EPOS2_TM_H6000, "SERIES_TM_T83III": EPOS2_TM_T83III, "SERIES_TM_T100": EPOS2_TM_T100, "SERIES_TS_100": EPOS2_TM_L100, "SERIES_TM_M50": EPOS2_TM_M50, "SERIES_TM_T88VII": EPOS2_TM_T88VII, "SERIES_TM_L90LFC": EPOS2_TM_L90LFC, "SERIES_TM_L100": EPOS2_TM_L100, // Print commands "COMMAND_ADD_TEXT": Commands.addText.rawValue , "COMMAND_ADD_NEW_LINE": Commands.addNewLine.rawValue , "COMMAND_ADD_TEXT_STYLE": Commands.addTextStyle.rawValue , "COMMAND_ADD_TEXT_SIZE": Commands.addTextSize.rawValue , "COMMAND_ADD_TEXT_SMOOTH": Commands.addTextSmooth.rawValue , "COMMAND_ADD_ALIGN": Commands.addAlign.rawValue , "COMMAND_ADD_IMAGE_BASE_64": Commands.addImageBase64.rawValue , "COMMAND_ADD_IMAGE_ASSET": Commands.addImageAsset.rawValue , "COMMAND_ADD_IMAGE": Commands.addImage.rawValue , "COMMAND_ADD_BARCODE": Commands.addBarcode.rawValue , "COMMAND_ADD_QRCODE": Commands.addQrCode.rawValue , "COMMAND_ADD_CUT": Commands.addCut.rawValue , "COMMAND_ADD_DATA": Commands.addData.rawValue , "COMMAND_ADD_PULSE": Commands.addPulse.rawValue , "ALIGN_LEFT": EPOS2_ALIGN_LEFT, "ALIGN_RIGHT": EPOS2_ALIGN_RIGHT, "ALIGN_CENTER": EPOS2_ALIGN_CENTER, "TRUE": EPOS2_TRUE, "FALSE": EPOS2_FALSE, // Print languages "LANG_EN": EPOS2_LANG_EN, "LANG_JA": EPOS2_LANG_JA, "LANG_ZH_CN": EPOS2_LANG_ZH_CN, "LANG_ZH_TW": EPOS2_LANG_ZH_TW, "LANG_KO": EPOS2_LANG_KO, "LANG_TH": EPOS2_LANG_TH, "LANG_VI": EPOS2_LANG_VI, "LANG_MULTI": EPOS2_LANG_MULTI, // Print Barcodes "BARCODE_UPC_A": EPOS2_BARCODE_UPC_A, "BARCODE_UPC_E": EPOS2_BARCODE_UPC_E, "BARCODE_EAN13": EPOS2_BARCODE_EAN13, "BARCODE_JAN13": EPOS2_BARCODE_JAN13, "BARCODE_EAN8": EPOS2_BARCODE_EAN8, "BARCODE_JAN8": EPOS2_BARCODE_JAN8, "BARCODE_CODE39": EPOS2_BARCODE_CODE39, "BARCODE_ITF": EPOS2_BARCODE_ITF, "BARCODE_CODABAR": EPOS2_BARCODE_CODABAR, "BARCODE_CODE93": EPOS2_BARCODE_CODE93, "BARCODE_CODE128": EPOS2_BARCODE_CODE128, "BARCODE_GS1_128": EPOS2_BARCODE_GS1_128, "BARCODE_GS1_DATABAR_OMNIDIRECTIONAL": EPOS2_BARCODE_GS1_DATABAR_OMNIDIRECTIONAL, "BARCODE_GS1_DATABAR_TRUNCATED": EPOS2_BARCODE_GS1_DATABAR_TRUNCATED, "BARCODE_GS1_DATABAR_LIMITED": EPOS2_BARCODE_GS1_DATABAR_LIMITED, "BARCODE_GS1_DATABAR_EXPANDED": EPOS2_BARCODE_GS1_DATABAR_EXPANDED, "BARCODE_CODE128_AUTO": EPOS2_BARCODE_CODE128_AUTO, "HRI_NONE": EPOS2_HRI_NONE, "HRI_ABOVE": EPOS2_HRI_ABOVE, "HRI_BELOW": EPOS2_HRI_BELOW, "HRI_BOTH": EPOS2_HRI_BOTH, "LEVEL_L": EPOS2_LEVEL_L, "LEVEL_M": EPOS2_LEVEL_M, "LEVEL_Q": EPOS2_LEVEL_Q, "LEVEL_H": EPOS2_LEVEL_H, "SYMBOL_QRCODE_MODEL_1": EPOS2_SYMBOL_QRCODE_MODEL_1, "SYMBOL_QRCODE_MODEL_2": EPOS2_SYMBOL_QRCODE_MODEL_2, "SYMBOL_QRCODE_MICRO": EPOS2_SYMBOL_QRCODE_MICRO, // Print image settings "COLOR_1": EPOS2_COLOR_1, "COLOR_2": EPOS2_COLOR_2, "COLOR_3": EPOS2_COLOR_3, "COLOR_4": EPOS2_COLOR_4, "MODE_MONO": EPOS2_MODE_MONO, "MODE_GRAY16": EPOS2_MODE_GRAY16, "MODE_MONO_HIGH_DENSITY": EPOS2_MODE_MONO_HIGH_DENSITY, "HALFTONE_DITHER": EPOS2_HALFTONE_DITHER, "HALFTONE_ERROR_DIFFUSION": EPOS2_HALFTONE_ERROR_DIFFUSION, "HALFTONE_THRESHOLD": EPOS2_HALFTONE_THRESHOLD, // Add pulse settings "DRAWER_2PIN": EPOS2_DRAWER_2PIN, "DRAWER_5PIN": EPOS2_DRAWER_5PIN ] as [String : Any] return record } func printerIsSetup() -> Bool { return printer != nil } func printerIsConnected() -> Bool { return isConnected } func discoverPrinters(fResult: @escaping FlutterResult ) { stopDiscovery() printerList.removeAll() self.filterOption.portType = EPOS2_PORTTYPE_BLUETOOTH.rawValue let status = Epos2Discovery.start(self.filterOption, delegate: self) if (status != EPOS2_SUCCESS.rawValue) { printDebugLog("🛑 did fail to start discovery process") fResult(PrinterError.startDiscovery.rawValue + "Did fail to start discovery") } else { printDebugLog("🟢 did start discovery process") // Gather all the results after `timeout` and return the response let deadline = dispatchTime(fromMilliseconds: Int(timeout)) DispatchQueue.global(qos: .userInitiated).asyncAfter(deadline: deadline, execute: { [weak self] in // Collect all the values received let discoveredDevices = self?.printerList ?? [] fResult(discoveredDevices) }) } } func getDevices(result: @escaping FlutterResult){ result(printerList) } func setupPrinter(target: String, series: Int, lang: Int) { if let printer = printer { printer.clearCommandBuffer() printer.setReceiveEventDelegate(nil) } self.printer = nil self.isConnected = false printer = Epos2Printer(printerSeries: Int32(series), lang: Int32(lang)) self.target = target printer?.setReceiveEventDelegate(self) } func pairingBluetoothPrinter(target:Any,fResult: @escaping FlutterResult) { guard let pairingPrinter = pairingPrinter else { fResult(PrinterError.startBluetooth.rawValue + "did fail to start bluetooth connection") return } let result = pairingPrinter.connectDevice(target as? NSMutableString ) switch (result) { case EPOS2_BT_SUCCESS.rawValue + EPOS2_BT_ERR_ALREADY_CONNECT.rawValue: fResult(EPOS2_BT_SUCCESS.rawValue) self.target= target break default: self.printer?.disconnect() pairingPrinter.disconnectDevice(target as? String) fResult(bluetoothMessage(code: result)) break } } func addCut(fResult: @escaping FlutterResult) { guard let printer = printer else { fResult(PrinterError.notFound.rawValue + "did fail to cut paper: no printer") return } let result = printer.addCut(EPOS2_CUT_FEED.rawValue) if (result != EPOS2_SUCCESS.rawValue) { fResult(PrinterError.cmdAddCut.rawValue + "did fail to cut paper: no printer") } fResult(true) } func addFeedLine(line: Int, fResult: @escaping FlutterResult) { guard let printer = printer else { fResult(PrinterError.notFound.rawValue + "did fail to add feed line: no printer") return } let result = printer.addFeedLine(line) if (result != EPOS2_SUCCESS.rawValue) { fResult(PrinterError.cmdAddFeedLine.rawValue + "did fail to add feed line") } fResult(true) } func addImage(base64: String, imageWidth: Int, imageHeight: Int, fResult: @escaping FlutterResult) { guard let printer = printer else { fResult(PrinterError.notFound.rawValue + "did fail to add image: no printer") return } guard let image = imageFromBase64(base64) else { fResult(PrinterError.notValidImage.rawValue + "did fail to add image: image not valid") return } let imgHeight = image.size.height let imgWidth = image.size.width let size = CGSize(width: CGFloat(imageWidth), height: imgHeight*CGFloat(imageWidth)/imgWidth) guard let scaledImage = scaleImage(image, size: size) else { fResult(PrinterError.notValidImage.rawValue + "did fail to add image: failed to resize image") return } let result = printer.add(scaledImage, x: 0, y: 0, width: Int(size.width), height: Int(size.height), color: EPOS2_PARAM_DEFAULT, mode: EPOS2_PARAM_DEFAULT, halftone: EPOS2_PARAM_DEFAULT, brightness: Double(EPOS2_PARAM_DEFAULT), compress: EPOS2_PARAM_DEFAULT) if (result != EPOS2_SUCCESS.rawValue) { fResult(PrinterError.cmdAddImage.rawValue + "did fail to add image") } fResult(true) } func addText(text: String, fResult: @escaping FlutterResult) { guard let printer = printer else { fResult(PrinterError.notFound.rawValue + "did fail to add text: no printer") return } let result = printer.addText(text) if (result != EPOS2_SUCCESS.rawValue) { fResult("did fail to add text: no printer") } fResult(true) } func addTextAlign(align: Int, fResult: @escaping FlutterResult) { guard let printer = printer else { fResult(PrinterError.notFound.rawValue + "did fail to add text align: no printer") return } // 0: left, 1: center, 2: right let textAlign = align == 0 ? EPOS2_ALIGN_LEFT : align == 1 ? EPOS2_ALIGN_CENTER : EPOS2_ALIGN_RIGHT let result = printer.addTextAlign(textAlign.rawValue) if (result != EPOS2_SUCCESS.rawValue) { fResult(PrinterError.cmdAddTextAlign.rawValue + "did fail to add text align") } fResult(true) } func addTextSize(width: Int, height: Int, fResult: @escaping FlutterResult) { guard let printer = printer else { fResult(PrinterError.notFound.rawValue + "did fail to add text size: no printer") return } let result = printer.addTextSize(width, height: height) if (result != EPOS2_SUCCESS.rawValue) { fResult(PrinterError.cmdAddTextSize.rawValue + "did fail to add text size") } fResult(true) } func clearBuffer(fResult: @escaping FlutterResult) { guard let printer = printer else { fResult(PrinterError.notFound.rawValue + "did fail to clear the buffer: no printer") return } let result = printer.clearCommandBuffer() if (result != EPOS2_SUCCESS.rawValue) { fResult(PrinterError.cmdClearBuffer.rawValue + "did fail to clear the buffer") } fResult(true) } func beginTransaction(fResult: @escaping FlutterResult) { guard let printer = printer else { fResult(PrinterError.notFound.rawValue + "did fail to begin transaction: no printer") return } let result = printer.beginTransaction() if (result != EPOS2_SUCCESS.rawValue) { fResult(PrinterError.cmdBeginTransaction.rawValue + "did fail to begin transaction") } fResult(true) } func endTransaction(fResult: @escaping FlutterResult) { guard let printer = printer else { fResult(PrinterError.notFound.rawValue + "did fail to end transaction: no printer") return } let result = printer.endTransaction() if (result != EPOS2_SUCCESS.rawValue) { fResult(PrinterError.cmdEndTransaction.rawValue + "did fail to end transaction") } fResult(true) } func sendData(fResult: @escaping FlutterResult) { guard let printer = printer else { fResult(PrinterError.notFound.rawValue + "did fail to send data: no printer") return } let result = printer.sendData(Int(EPOS2_PARAM_DEFAULT)) if (result != EPOS2_SUCCESS.rawValue) { fResult(PrinterError.cmdSendData.rawValue + "did fail to send data") } fResult(true) } func connect(fResult: @escaping FlutterResult) { guard let printer = printer else { fResult(PrinterError.notFound.rawValue + "did fail connect: no printer") return } guard let target = target else { fResult(PrinterError.missingTarget.rawValue + "target not found") return } let result = printer.connect(target, timeout: Int(timeout)) if (result != EPOS2_SUCCESS.rawValue) { isConnected = false printDebugLog("did fail to connect: (result)") fResult(PrinterError.cmdConnect.rawValue + "did fail to connect") } isConnected = true fResult(true) } func disconnect(fResult: @escaping FlutterResult) { guard let printer = printer else { // Do nothing if we haven't setup a printer yet fResult(true) return } let result = printer.disconnect() if (result != EPOS2_SUCCESS.rawValue) { isConnected = false fResult(PrinterError.cmdDisconnect.rawValue + "did fail to disconnect") } isConnected = true fResult(true) } } private extension EpsonManager { func stopDiscovery() { let status = Epos2Discovery.stop() if (status != EPOS2_SUCCESS.rawValue) { printDebugLog("🛑 did fail to stop discovery process") } else { printDebugLog("🟢 did stop discovery process") } } func dispatchTime(fromMilliseconds milliseconds: Int) -> DispatchTime { let seconds = milliseconds / 1000 let nanoSeconds = (milliseconds % 1000) * 1_000_000 let uptimeNanoseconds = DispatchTime.now().uptimeNanoseconds + UInt64(seconds) * 1_000_000_000 + UInt64(nanoSeconds) return DispatchTime(uptimeNanoseconds: uptimeNanoseconds) } func imageFromBase64(_ base64: String) -> UIImage? { if let data = Data(base64Encoded: base64) { return UIImage(data: data) } return nil } func scaleImage(_ image: UIImage, size: CGSize) -> UIImage? { let scale: CGFloat = max(size.width/image.size.width, size.height/image.size.height); let width: CGFloat = image.size.width * scale; let height: CGFloat = image.size.height * scale; let imageRect: CGRect = CGRectMake((size.width - width)/2.0, (size.height - height)/2.0, width, height); UIGraphicsBeginImageContextWithOptions(size, false, 0); image.draw(in: imageRect) let newImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return newImage; } } extension EpsonManager: Epos2DiscoveryDelegate { func onDiscovery(_ deviceInfo: Epos2DeviceInfo!) { printerList.append(["deviceType": deviceInfo.deviceType, "target": deviceInfo.target!, "deviceName": deviceInfo.deviceName!, "ipAddress": deviceInfo.ipAddress, "macAddress": deviceInfo.macAddress, "bdAddress": deviceInfo.bdAddress as Any, "leBdAddress": deviceInfo.leBdAddress]) } } extension EpsonManager: Epos2PtrReceiveDelegate { func onPtrReceive(_ printerObj: Epos2Printer!, code: Int32, status: Epos2PrinterStatusInfo!, printJobId: String!) { printDebugLog("onPtrReceive(): code=(code), status: (String(describing: status)), printJobId: (String(describing: printJobId))") } } func usbAddress(target: String) -> String? { let rangeFirstThree = NSMakeRange(0, 3) let rangeThreeTillLength = NSMakeRange(4, target.count-4) let nsTarget = NSString(string: target) let prefix = nsTarget.substring(with: rangeFirstThree) if prefix == "USB" { return nsTarget.substring(with: rangeThreeTillLength) } else { return nil } } func bluetoothMessage(code: Int32) -> String { switch (code) { case EPOS2_BT_SUCCESS.rawValue: return "BLUETOOTH_SUCCESS" case EPOS2_BT_ERR_PARAM.rawValue: return "BLUETOOTH_ERROR_PARAM" case EPOS2_BT_ERR_CANCEL.rawValue: return "BLUETOOTH_ERROR_CANCEL" case EPOS2_BT_ERR_FAILURE.rawValue: return "BLUETOOTH_ERROR_FAILURE" case EPOS2_BT_ERR_UNSUPPORTED.rawValue: return "BLUETOOTH_ERROR_UNSUPPORTED" case EPOS2_BT_ERR_ILLEGAL_DEVICE.rawValue: return "BLUETOOTH_ERROR_ILLEGAL_DEVICE" case EPOS2_BT_ERR_ALREADY_CONNECT.rawValue: return "BLUETOOTH_ERROR_ALREADY_CONNECT" default: return "BLUETOOTH_ERROR_UNKNOWN" } }

question:look i want to conect to printer and print a sample , iam usning epson sdk

question:give me connect to targeted printer and print a sample logic

question:add arabic language to printer so can i print arabic words