ObjectiveC block

 Objective-C block

http://www.cnblogs.com/studentdeng/archive/2012/02/03/2336863.html

objective-c block 详解

http://www.j2megame.org/index.php/content/view/2625/165.html

介绍Apple GNU C/C++，objective-C/C++中的新特性——Blocks

http://www.cocoachina.com/bbs/simple/?t9222.html