EricADockery

var manager: EAAccessoryManager!
var isConnected: Bool = false
private var printerConnection: MfiBtPrinterConnection?
private var serialNumber: String?
private var disconnectNotificationObserver: NSObjectProtocol?
private var connectedNotificationObserver: NSObjectProtocol?
static let sharedInstance = PrintManager()

EricADockery

class ViewController: UIViewController {
    @IBOutlet var printerConnectionStatus: UILabel!
    var printManager = PrintManager.sharedInstance
    override func viewDidLoad() {
        super.viewDidLoad()
        printManager.connectionDelegate = self
        if printManager.isConnected {
            printerConnectionStatus.text = “Connected”
        } else {
            printerConnectionStatus.text = “Not Connected”

EricADockery

private func printerTextField(font:Int, size: Int, x:Int, y: Int, content: String) -> String {
    return “TEXT \(font) \(size) \(x) \(y) \(content)”
}
private func printMultiLineTextField(linesHeight: Int, font:Int, size: Int, x:Int, y: Int, content: String) -> String {
    return “ML \(linesHeight)\nTEXT \(font) \(size) \(x) \(y) \n\(content)\nENDML\nENDML”
}
private func printerBarCodeFormat(width: Int, ratio: Int, height: Int, x: Int, y:Int, content: String) -> String {
    return “BARCODE 128 \(width) \(ratio) \(height) \(x) \(y) \(content)”
}

EricADockery

func findConnectedPrinter(completion: (Bool) -> Void) {
    let connectedDevices = manager.connectedAccessories
    for device in connectedDevices {
        if device.protocolStrings.contains(“com.zebra.rawport”) {
            serialNumber = device.serialNumber
            connectToPrinter(completion: { completed in
                completion(completed)
            })
        }
    }

EricADockery

deinit {
    if let disconnectNotificationObserver = disconnectNotificationObserver {
        NotificationCenter.default.removeObserver(disconnectNotificationObserver)
    }
    if let connectedNotificationObserver = connectedNotificationObserver {
        NotificationCenter.default.removeObserver(connectedNotificationObserver)
    }
}

EricADockery

private override init() {
    super.init()
    manager = EAAccessoryManager.shared()
    findConnectedPrinter { [weak self] bool in
        if let strongSelf = self {
            strongSelf.isConnected = bool
        }
    }
    //Notifications
    disconnectNotificationObserver = NotificationCenter.default.addObserver(forName: Notification.Name.EAAccessoryDidDisconnect, object: nil, queue: nil, using: didDisconnect)

EricADockery

var manager: EAAccessoryManager!
var isConnected: Bool = false
//new content from step1
var connectionDelegate: EAAccessoryManagerConnectionStatusDelegate?
// end new content
private var printerConnection: MfiBtPrinterConnection?
private var serialNumber: String?
private var disconnectNotificationObserver: NSObjectProtocol?
private var connectedNotificationObserver: NSObjectProtocol?
static let sharedInstance = PrintManager()

EricADockery

protocol EAAccessoryManagerConnectionStatusDelegate {
    func connectionStatusChanged() -> Void
}

EricADockery

private func didDisconnect(notification: Notification) {
    isConnected = false
    connectionDelegate?.connectionStatusChanged()
}
private func didConnect(notification: Notification) {
    isConnected = true
    connectionDelegate?.connectionStatusChanged()
}

EricADockery

enum CommonPrintingFormat: String {
  case start = “! 0 200 200 150 1”
  case end = “\nFORM\nPRINT “
}