Edit->Refactor->Rename
需要修改的地方：
1.project
2.scheme
3.Host Application
4.文件夹&group new newTests newUITests 右侧Location
5.tests&UITests文件名 interface implementation(全局搜索)
6.build setting:info.plist file(project tests UITests)
product bundle identifier
7.image.xcassets
原文：http://www.cnblogs.com/guchunli/p/6268576.html