Fixed delete backward issue

SwiftyCodeView.podspec

@@ -9,7 +9,7 @@
 Pod::Spec.new do |s|
  s.swift_version     = '4.1'
   s.name             = 'SwiftyCodeView'
-  s.version          = '0.3.2'
+  s.version          = '0.3.3'
   s.summary          = 'An UI Component for verification codes written in swift'
 
   s.description      = <<-DESC

SwiftyCodeView/Classes/SwiftyCodeView/SwiftyCodeTextField.swift

@@ -15,7 +15,7 @@ open class SwiftyCodeTextField: UITextField {
     weak open var deleteDelegate: SwiftyCodeTextFieldDelegate?
 
     override open func deleteBackward() {
-        super.deleteBackward()        
         deleteDelegate?.deleteBackward(sender: self)
+		super.deleteBackward()        
     }
 }

SwiftyCodeView/Classes/SwiftyCodeView/SwiftyCodeView.swift

@@ -6,135 +6,155 @@
 
 import UIKit
 
+#if canImport(RxCocoa)
+import RxSwift
+import RxCocoa
+extension Reactive where Base: SwiftyCodeView {
+
+	/// Reactive wrapper for `code` property.
+	internal var code: ControlProperty<String> {
+		return controlProperty(editingEvents: [.allEditingEvents, .valueChanged],
+							   getter: { codeView in
+								codeView.code
+		}, setter: { codeView, value in
+			codeView.code = value
+		})
+	}
+}
+#endif
+
+
 @objc
 public protocol SwiftyCodeViewDelegate: class {
-    func codeView(sender: SwiftyCodeView, didFinishInput code: String)
+	func codeView(sender: SwiftyCodeView, didFinishInput code: String)
 }
 
 @IBDesignable
 open class SwiftyCodeView: UIControl {
-    @IBInspectable open var length: Int = 4 {
-        didSet {
-            setupUI()
-        }
-    }
-    
-    @IBOutlet open weak var delegate: SwiftyCodeViewDelegate?
-    
-    var stackView: UIStackView = {
-        let stackView = UIStackView()
-        stackView.axis = .horizontal
-        stackView.distribution = .equalSpacing
-        stackView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
-        return stackView
-    }()
-    
-    fileprivate var items: [SwiftyCodeItemView] = []
-    open var code: String {
-        get {
-            let items = stackView.arrangedSubviews.map({$0 as! SwiftyCodeItemView})
-            let values = items.map({$0.textField.text ?? ""})
-            return values.joined()
-        }
-        set {
-            let array = newValue.map(String.init)
-            for i in 0..<array.count {
-                let item = stackView.arrangedSubviews[i] as! SwiftyCodeItemView
-                item.textField.text = array[i]
-            }
-        }
-    }
-    
-    override open func awakeFromNib() {
-        super.awakeFromNib()
-        setupUI()
-        
-        let tap = UITapGestureRecognizer(target: self, action: #selector(becomeFirstResponder))
-        addGestureRecognizer(tap)
-    }
-    
-    fileprivate func setupUI() {
-        stackView.frame = self.bounds
-        if stackView.superview == nil {
-            addSubview(stackView)
-        }
-        stackView.arrangedSubviews.forEach{($0.removeFromSuperview())}
-        
-        for i in 0..<length {
-            let itemView = generateItem()
-            itemView.textField.deleteDelegate = self
-            itemView.textField.delegate = self
-            itemView.tag = i
-            itemView.textField.tag = i
-            stackView.addArrangedSubview(itemView)
-        }
-    }
-    
-    open func generateItem() -> SwiftyCodeItemView {
-        let type = SwiftyCodeItemView.self
-        let typeStr = type.description().components(separatedBy: ".").last ?? ""
-        let bundle = Bundle(for: type)
-        return bundle
-            .loadNibNamed(typeStr,
-                          owner: nil,
-                          options: nil)?
-            .last as! SwiftyCodeItemView
-    }
-    
-    override open func becomeFirstResponder() -> Bool {
-        let items = stackView.arrangedSubviews
-            .map({$0 as! SwiftyCodeItemView})
-        return (items.filter({($0.textField.text ?? "").isEmpty}).first ?? items.last)!.becomeFirstResponder()
-    }
-    
-    override open func resignFirstResponder() -> Bool {
-        stackView.arrangedSubviews.forEach({$0.resignFirstResponder()})
-        return true
-    }
-    
-    override open func prepareForInterfaceBuilder() {
-        super.prepareForInterfaceBuilder()
-        setupUI()
-    }
+	@IBInspectable open var length: Int = 4 {
+		didSet {
+			setupUI()
+		}
+	}
+
+	@IBOutlet open weak var delegate: SwiftyCodeViewDelegate?
+
+	var stackView: UIStackView = {
+		let stackView = UIStackView()
+		stackView.axis = .horizontal
+		stackView.distribution = .equalSpacing
+		stackView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+		return stackView
+	}()
+
+	fileprivate var items: [SwiftyCodeItemView] = []
+	open var code: String {
+		get {
+			let items = stackView.arrangedSubviews.map({$0 as! SwiftyCodeItemView})
+			let values = items.map({$0.textField.text ?? ""})
+			return values.joined()
+		}
+		set {
+			let array = newValue.map(String.init)
+			for i in 0..<array.count {
+				let item = stackView.arrangedSubviews[i] as! SwiftyCodeItemView
+				item.textField.text = array[i]
+			}
+		}
+	}
+
+	override open func awakeFromNib() {
+		super.awakeFromNib()
+		setupUI()
+
+		let tap = UITapGestureRecognizer(target: self, action: #selector(becomeFirstResponder))
+		addGestureRecognizer(tap)
+	}
+
+	fileprivate func setupUI() {
+		stackView.frame = self.bounds
+		if stackView.superview == nil {
+			addSubview(stackView)
+		}
+		stackView.arrangedSubviews.forEach{($0.removeFromSuperview())}
+
+		for i in 0..<length {
+			let itemView = generateItem()
+			itemView.textField.deleteDelegate = self
+			itemView.textField.delegate = self
+			itemView.tag = i
+			itemView.textField.tag = i
+			stackView.addArrangedSubview(itemView)
+		}
+	}
+
+	open func generateItem() -> SwiftyCodeItemView {
+		let type = SwiftyCodeItemView.self
+		let typeStr = type.description().components(separatedBy: ".").last ?? ""
+		let bundle = Bundle(for: type)
+		return bundle
+			.loadNibNamed(typeStr,
+						  owner: nil,
+						  options: nil)?
+			.last as! SwiftyCodeItemView
+	}
+
+	override open func becomeFirstResponder() -> Bool {
+		let items = stackView.arrangedSubviews
+			.map({$0 as! SwiftyCodeItemView})
+		return (items.filter({($0.textField.text ?? "").isEmpty}).first ?? items.last)!.becomeFirstResponder()
+	}
+
+	override open func resignFirstResponder() -> Bool {
+		stackView.arrangedSubviews.forEach({$0.resignFirstResponder()})
+		return true
+	}
+
+	override open func prepareForInterfaceBuilder() {
+		super.prepareForInterfaceBuilder()
+		setupUI()
+	}
 }
 
 extension SwiftyCodeView: UITextFieldDelegate, SwiftyCodeTextFieldDelegate {
-
-    public func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
-
-        if string == "" { //is backspace
-            return true
-        }
-
-        if !textField.hasText {
-            let index = textField.tag
-            let item = stackView.arrangedSubviews[index] as! SwiftyCodeItemView
-            item.textField.text = string
-            sendActions(for: .valueChanged)
-            if index == length - 1 { //is last textfield
-                delegate?.codeView(sender: self, didFinishInput: self.code)
-                textField.resignFirstResponder()
-                return false
-            }
-
-            _ = stackView.arrangedSubviews[index + 1].becomeFirstResponder()
-        }
-
-        return false
-    }
-
-    public func deleteBackward(sender: SwiftyCodeTextField) {
-        for i in 1..<length{
-            let itemView = stackView.arrangedSubviews[i] as! SwiftyCodeItemView
-
-            if !itemView.textField.isFirstResponder {
-                continue
-            }
-
-            let prevItem = stackView.arrangedSubviews[i-1] as! SwiftyCodeItemView
-            _ = prevItem.becomeFirstResponder()
-            prevItem.textField.text = ""
-        }
-        sendActions(for: .valueChanged)
-    }
+
+	public func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
+
+		if string == "" { //is backspace
+			return true
+		}
+
+		if !textField.hasText {
+			let index = textField.tag
+			let item = stackView.arrangedSubviews[index] as! SwiftyCodeItemView
+			item.textField.text = string
+			sendActions(for: .valueChanged)
+			if index == length - 1 { //is last textfield
+				delegate?.codeView(sender: self, didFinishInput: self.code)
+				textField.resignFirstResponder()
+				return false
+			}
+
+			_ = stackView.arrangedSubviews[index + 1].becomeFirstResponder()
+		}
+
+		return false
+	}
+
+	public func deleteBackward(sender: SwiftyCodeTextField) {
+		for i in 1..<length{
+			let itemView = stackView.arrangedSubviews[i] as! SwiftyCodeItemView
+
+			if !itemView.textField.isFirstResponder {
+				continue
+			}
+
+			let prevItem = stackView.arrangedSubviews[i-1] as! SwiftyCodeItemView
+			if itemView.textField.text?.isEmpty ?? true {
+				prevItem.textField.text = ""
+				_ = prevItem.becomeFirstResponder()
+			}
+		}
+		sendActions(for: .valueChanged)
+	}
 }

SwiftyCodeViewDemo/SwiftyCodeViewDemo.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>