说明： Learn.Objective-C.on.the.Mac 详细阐述了Objective-C语言在Mac开发中遇到的各种问题，是帮助程序员了解Mac开发的一本好书。 (Learn.Objective-C.on.the.Mac elaborated on the Mac Objective-C language development problems encountered, is to help programmers understand the Mac development a good book.)
