Detecting New Pictures Taken by Users While Running in Background: Workarounds and Challenges

Fixing Duplicate Images When Uploading Multiple Files from an iPhone

How Accurate is the iOS Clock: Understanding Timekeeping and Precision

Understanding the Capabilities and Limitations of iPod Touch 3G and iPhone for App Development

Integrating with Nike+ Features of the iPhone 4G: A Comprehensive Guide for Developers

Understanding NSNotification in iOS Development: A Powerful Tool for Decoupling Code

Understanding the Limitations of Battery Level Monitoring on iOS: A Guide to Higher Precision Battery Data

Implementing GPS and Time-Activated Push Notifications Using Apple's Geofencing Model

Understanding How to Attach Files to iOS Calendar Events Using Workarounds

Understanding the Connection Between iPhone Gyroscope YAW and PITCH Values