第三方式工具
iLocalize(http://www.arizona-software.ch/ilocalize)
从XIBS中提取.string文件
ibtool --export-strings-file zh-Hans.lproj/base.strings Base.lproj/Main.storyboard
Change the export string file is not in utf-8 format.
Merge the new strings in vimdiff.
vimdiff a.string b.stirng