let pinCodeView = ASPinCodeField()
pinCodeView.delegate = self
pinCodeView.dataSource = self
pinCodeView.borderColor = UIColor.lightGray
pinCodeView.textColor = UIColor.black
pinCodeView.cornerRadius = 4
pinCodeView.itemsSpacing = 8
pinCodeView.textFont = .boldSystemFont(ofSize: 20)

public protocol ASPinCodeFieldDelegate: class {
    func pinCodeField(_ pinCodeField: ASPinCodeField, didChangeText text: String)
}

public protocol ASPinCodeFieldDataSource: class {
    func numberOfDigits(in pinCodeField: ASPinCodeField) -> Int
    func canPasteFromPasteBoard(_ pinCodeField: ASPinCodeField, pasteboard: String) -> Bool
}