Ray Wenderlich and his team of iOS developers/writers have put together an impressive collection of tutorials in their lastest book iOS 6 by tutorials – available in PDF and print.
It all started so simple 4+ years ago. However, the iOS platform has become quite comprehensive, and with each new milestone release of iOS comes an abundance of new features. It can be quite a challenge to keep up. iOS 6 by tutorials covers many of most recent additions to iOS 6 including UICollectionView, Auto Layout, Passbook, among others.
Prior to iOS 6, in low memory conditions iOS would call viewWillUnload and viewDidUnload before releasing unneeded views from memory. Apple has determined that the memory captured was not worth the overhead and additional issues caused by using these methods.
Beginning in iOS 6, viewWillUnload and viewDidUnload are deprecated, as views are no longer removed from memory if the OS runs low on the same. Put another way, if your app targets iOS 6, these methods will not be called. Continue reading →