Apple公告2015年5月所新開發的App或更新上架時,如有使用Garbage Collection必需要更新為ARC(Automatic Reference Counting),原文如下:
Beginning May 1, 2015, new Mac apps and app updates submitted to the Mac App Store may no longer use garbage collection, which was deprecated in OS X Mountain Lion. Instead, migrate your apps to Automatic Reference Counting, using the migration assistant in Xcode to help with this transition. Apps may continue to use retain/release for manual memory management.
如何由Garbage Collection升級為ARC參考Transitioning to ARC Release Notes