命令添加three20
> python three20/src/scripts/ttmodule.py -p path/to/your/project/project.xcodeproj Three20 --xcode-version=4
详细网站：
http://three20.info/article/2011-03-10-Xcode4-Support%20%3E%20python%20three20/src/scripts/ttmodule.py%20-p%20path/to/your/project/project.xcodeproj%20Three20%20--xcode-version=4