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When your iPhone app crashes with 'BAD ACCESS' you're in trouble - a memory bug where you tried to call a method on a object that was already deleted. Instruments has support for NSZombie - a feature that makes it easy to find the source of the bug by showing you a full history of every alloc, retain, release, and autorelease of the object that caused the crash! Wow. Here's how: Basic steps are: R

My Postcards app has a design screen where you can change colors of things, so I needed a color picker. A very easy way to make a color picker on just about any platform is to make some kind of color pallet image file, display it for the user to click on, and do a call like: getPixelColorAtScreenLocation(x,y) This was available back in 1983 on my ZX-Spectrum, but alas Cocoa Touch doesn't have it.

AppViz charts all your app store sales reports for you, and for a huge time saving it logs in to iTunes Connect for you and downloads them automatically. An added bonus (assuming you can stomach reading them) is that AppViz will download all your app reviews too! AppViz charts new downloads, upgrade downloads, all downloads, and sales revenue. Graphs can be plotted by different date ranges and for

You'll want to read this post from 2011: HJCache - we've released a comprehensive library for free that makes it easy to use dynamically loaded and cached images in your iOS apps, as per this intro article... Readers... do look through the comments if you plan to use this code, other people have posted improvements. Thanks for all the great feedback everyone. MJ The app 'Postcards' from my iPhone