关于“IOS6_内置字体库下载”的文章网址

http://blog.csdn.net/liaoyp_ios_android/article/details/10459141

XCode4 错误调试的两种方法

http://www.devdiv.com/iOS_iPhone-Xcode4_%E7%9A%84%E9%94%99%E8%AF%AF%E8%B0%83%E8%AF%95%E5%AE%9A%E4%BD%8D%E6%8A%80%E5%B7%A7-thread-119942-1-1.html

MKNetworkOperation类 的相关介绍 网址如下

http://wangjianlewo.blog.163.com/blog/static/176568051201211193527417/

取消网络请求的文章

http://www.cocoachina.com/bbs/read.php?tid=115023

MKNetworkOperation和ASI AFNetWork的比较

http://m.oschina.net/blog/171279

ios5 ios6横竖屏问题
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