一.报错的代码
*** Terminating app due to uncaught exception ‘NSInvalidArgumentException‘, reason: ‘-[NSInvocation setArgument:atIndex:]: index (2) out of bounds [-1, 1]‘
iOS开发小技巧--实现将图片保存到本地相册
原文：http://www.cnblogs.com/gchlcc/p/5507628.html
