Here is the code based on the specifications provided:

Understanding iOS App Scaling Issues with AS3 and AIR: A Guide to iPhone 6 Compatibility

Mastering Lightweight Migration in Core Data for Efficient Data Model Updates

Creating Custom String Hashing Function for File Names on iOS Using CommonCrypto Library

Understanding the Nuances of Date Formatting in Objective-C: Overcoming the Challenges of Converting NSString to NSDate

Understanding the iOS Keyboard Notification System: Avoiding Common Pitfalls When Working with UIKeyboardWillShowNotification and UIKeyboardWillHideNotification

Understanding and Handling Line Breaks in iOS String Concatenation

How to Programmatically Call a ViewController PopOver with Custom UIButton

Understanding ShareKit in Xcode 4: Mitigating Deprecations and Ensuring Compatibility with the Latest Version of Apple's Integrated Development Environment (IDE).

Adjusting Image Orientation for Accurate Face Detection with OpenCV in iOS Development