Update readme

Author: viniciussoares

README.mdown

@@ -1,24 +1,26 @@
-# DatePickerDialog 3.0- iOS - Swift
+# DatePickerDialog 4.0 - iOS - Swift
 
 DatePickerDialog is an iOS drop-in classe that displays an UIDatePicker within an UIAlertView.
 
 [![](https://raw.githubusercontent.com/squimer/DatePickerDialog-iOS-Swift/master/images/screen1.png)](https://github.com/squimer/DatePickerDialog-iOS-Swift/tree/master/images)
 
 ## Requirements
 
-DatePickerDialog works on iOS 7, 8 and 9, 10, 11 and 12. It depends on the following Apple frameworks, which should already be included with most Xcode templates:
+DatePickerDialog works on iOS 7, 8 and 9, 10, 11, 12, 13 and 14. It depends on the following Apple frameworks, which should already be included with most Xcode templates:
 
 * Foundation
 * UIKit
 
 #### Swift Versions
-- Swift 5.0 (Current)
+- Swift 5.3 (Current)
+- Swift 4.2 (```3.0``` tag)
 - Swift 4.2 (```2.1``` tag)
 - Swift 4.2 (```2.0``` tag)
 - Swift 2.3 (```swift_2.3``` branch)
 
 ## Installation
 #### CocoaPods
+
 You can use [CocoaPods](http://cocoapods.org/) to install `DatePickerDialog` by adding it to your `Podfile`:
 
 ```ruby
@@ -47,19 +49,19 @@ github "squimer/DatePickerDialog-iOS-Swift"
 ## Example
 
 ```swift
-	func datePickerTapped() {
-		DatePickerDialog().show(title: "DatePicker", doneButtonTitle: "Done", cancelButtonTitle: "Cancel", datePickerMode: .date) {
-			(date) -> Void in
-			if let dt = date {
-                		let formatter = DateFormatter()
-                		formatter.dateFormat = "MM/dd/yyyy"
-                		self.textField.text = formatter.string(from: dt)
-            		}
+func datePickerTapped() {
+	DatePickerDialog().show(title: "DatePicker", doneButtonTitle: "Done", cancelButtonTitle: "Cancel", datePickerMode: .date) { date in
+		if let dt = date {
+			let formatter = DateFormatter()
+			formatter.dateFormat = "MM/dd/yyyy"
+			self.textField.text = formatter.string(from: dt)
 		}
 	}
+}
 ```
 
 ## Dialog parameters
+
 - showCancelButton: Bool - default true
 - locale: Locale? - default nil
 
@@ -73,7 +75,6 @@ Example with custom locale:
 DatePickerDialog(locale: Locale(identifier: "es_PY")).show(title: "DatePicker", doneButtonTitle: "Done", datePickerMode: .date)
 ```
 
-
 ## Show parameters
 
 - title: String **(Required)**

Sources/DatePickerDialog.swift

@@ -33,7 +33,7 @@ open class DatePickerDialog: UIView {
     private var buttonColor: UIColor!
     private var font: UIFont!
 
-    private lazy var container = UIView()
+    private var container: UIView?
     private lazy var gradient = CAGradientLayer(layer: self.layer)
 
     // MARK: - Dialog initialization
@@ -179,6 +179,8 @@ open class DatePickerDialog: UIView {
         self.frame = CGRect(x: 0, y: 0, width: screenSize.width, height: screenSize.height)
 
         // This is the dialog's container; we attach the custom content and the buttons to this one
+        let container = UIView()
+        self.container = container
         container.frame = CGRect(
             x: (screenSize.width - dialogSize.width) / 2,
             y: (screenSize.height - dialogSize.height) / 2,
@@ -310,7 +312,7 @@ open class DatePickerDialog: UIView {
 
     open override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
         super.traitCollectionDidChange(previousTraitCollection)
-        container.layer.borderColor = Colors.separator.cgColor
+        container?.layer.borderColor = Colors.separator.cgColor
         gradient.colors = Colors.gradientBackground
     }
 }