学步园

为了解决这个问题弄了两天。。。终于找到方法了。。。

把方法写出来给大家分享一下～～

打开Xcode，Xcode->Preferences->Documentation->选取你想要的文档右边的感叹号，复制feed url到浏览器中打开，下载相应文档。

然后：

1. Move the .xar file to /Developer/Documentation/DocSets/ and extract the file by running xar -xf on the file from the same directory. (Run cd /Developer/Documentation/DocSets` first).
2. You then need to change the permissions on the files by running sudo chown -R -P _devdocs *.docset
3. Launch Xcode and you should be good to go.