Merge branch 'master' of https://github.com/pvn/PKSecurePin

README.md

@@ -1,6 +1,13 @@
 # PKSecurePin
 Elegant Secure PIN with 4 digits in Swift
 
+[![Platform](http://img.shields.io/badge/platform-ios-blue.svg?style=flat
+)](https://developer.apple.com/iphone/index.action)
+[![Language](http://img.shields.io/badge/language-swift-brightgreen.svg?style=flat
+)](https://developer.apple.com/swift)
+[![License](http://img.shields.io/badge/license-MIT-lightgrey.svg?style=flat
+)](http://mit-license.org)
+
 **Feature:**
 * Ease to use
 * 4 digit pin input with confirm pin input
@@ -9,3 +16,34 @@ Elegant Secure PIN with 4 digits in Swift
 * Auto jump to immediate next input on every insertion
 * Auto jump to immediate previous input on every deletion
 * Disallow to chose any input manually
+
+<img src="./demo.gif" width="200" alt="Screenshot" />
+
+# Usage
+```swift
+
+        // create an instance of PKSecurePinViewController
+        let pinViewC  = PKSecurePinViewController.init()
+
+       // create the navigation controller
+        let pinNav = UINavigationController(rootViewController: pinViewC)        
+        pinNav.modalPresentationStyle = .popover
+
+        //pinview controller position
+        pinViewC.preferredContentSize = CGSize(width: 500, height: 200)
+
+        // create an instance for popover
+        let popover = pinNav.popoverPresentationController
+        popover?.permittedArrowDirections = UIPopoverArrowDirection(rawValue: 0)
+        popover?.sourceView = self.view
+
+        //popover position
+        popover?.sourceRect = CGRect(x: UIScreen.main.bounds.width * 0.5 - 200, 
+                                     y: UIScreen.main.bounds.height * 0.5 - 100, 
+                                     width: 400, height: 200)
+
+        //present the navigation controller
+        self.present(pinNav, animated: true, completion: nil)
+
+
+