Fixing issue with ObjC compatibility for plain text validation.

BMInputBox.podspec

@@ -9,7 +9,7 @@
 
 Pod::Spec.new do |s|
   s.name             = "BMInputBox"
-  s.version          = "1.2.2"
+  s.version          = "1.2.3"
   s.summary          = "Drop-in replacement for the limited UIAlertView input options."
   s.description      = <<-DESC
                        BMInputBox is an iOS drop-in class wrote in Swift that displays input boxes for the user to input different kinds of data, for instance username and password, email address, numbers, plain text. BMInputBox is meant as a replacement for the limited UIAlertView input options.

Pod/Classes/BMInputBox.swift

@@ -55,10 +55,10 @@ public class BMInputBox: UIView {
    Customisation of the PlainText type
    */
   /// Maximum length of the text.  If set, the entered text's length will be checked against this.
-  public var maximumLength: Int?
+  public var maximumLength: Int = 0
 
   /// Minimum length of the text. If set, the entered text's length will be checked against this.
-  public var minimumLength: Int?
+  public var minimumLength: Int = 0
 
   /**
    String used to notify the user about the value critera (minimum and maximum values).
@@ -289,18 +289,18 @@ public class BMInputBox: UIView {
 
       let messageString: String? = self.validationLabelText
 
-      if (self.minimumLength != nil && self.maximumLength == nil) {
-        self.validationLabel.text = String(format: messageString ?? "A text longer than %i characters.", self.minimumLength!) as String
+      if (self.minimumLength != 0 && self.maximumLength == 0) {
+        self.validationLabel.text = String(format: messageString ?? "A text longer than %i characters.", self.minimumLength) as String
       }
-      else if (self.minimumLength == nil && self.maximumLength != nil) {
-        self.validationLabel.text = String(format: messageString ?? "A text shorter than %i characters.", self.maximumLength!) as String
+      else if (self.minimumLength == 0 && self.maximumLength != 0) {
+        self.validationLabel.text = String(format: messageString ?? "A text shorter than %i characters.", self.maximumLength) as String
       }
-      else if (self.minimumLength != nil && self.maximumLength != nil) {
+      else if (self.minimumLength != 0 && self.maximumLength != 0) {
 
         if (self.minimumLength == self.maximumLength) {
-          self.validationLabel.text = String(format: messageString ?? "A text exactly %i characters long.", self.minimumLength!) as String
+          self.validationLabel.text = String(format: messageString ?? "A text exactly %i characters long.", self.minimumLength) as String
         } else {
-          self.validationLabel.text = String(format: messageString ?? "A text between %i and %i characters.", self.minimumLength!, self.maximumLength!) as String
+          self.validationLabel.text = String(format: messageString ?? "A text between %i and %i characters.", self.minimumLength, self.maximumLength) as String
         }
       }
 
@@ -489,20 +489,20 @@ public class BMInputBox: UIView {
     /**
      *  Validating the plain text input. Lenght of the text.
      */
-    if self.style == .PlainTextInput && (self.minimumLength != nil || self.maximumLength != nil) {
+    if self.style == .PlainTextInput && (self.minimumLength != 0 || self.maximumLength != 0) {
       if self.textInput?.text == "" {
         return false
       }
 
       // Lower than minimum value
-      if self.minimumLength != nil {
+      if self.minimumLength != 0 {
         if self.minimumLength > self.textInput!.text!.characters.count {
           return false
         }
       }
 
       // Greater maximum value
-      if self.maximumLength != nil {
+      if self.maximumLength != 0 {
         if self.maximumLength < self.textInput!.text!.characters.count {
           return false
         }