摘要：
1.对于autorelease的理解 Each thread in a Cocoa application maintains its own stack of autorelease pool blocks.(Advanced Memory Management Programming Guide:Using Autorelease Pool Blocks) 通过这句话，我们可以看出autorelease pool 是栈的形式，andautorelease pool blocks can be nested主线程中也有自己的autorelease pool，这又牵扯出run loop。实.. 阅读全文
