Erasing Rectangles from Images in UIImageView: A Guide to Visual Effects and Image Overlays

Understanding Objective-C's `NSCopying` Protocol and its Role in Array Manipulation: Mastering Unique Object Handling in Arrays

Displaying and Playing Videos from ALAssets in iOS: A Comprehensive Guide

Understanding Core Motion Framework Compatibility on Pre-iOS 4 Devices

Creating a Histogram Life Data Type in Objective-C/iPhone App

Detecting Paging Swipe in iOS ScrollView for a Dock-Style Magnification Effect

Storing Objective-C Data: NSArray, NSMutableArray, or Property List Files (.plist)?