iOS framework addition failed due to a CocoaPods installation failure. This will will likely result

Mac环境打包iOS报错，错误信息：

iOS framework addition failed due to a CocoaPods installation failure. This will will likely result in an non-functional Xcode project.
After the failure, "pod repo update" was executed and succeeded. "pod install" was then attempted again, and still failed. This may be due to a broken CocoaPods installation. See: https://guides.cocoapods.org/using/troubleshooting.html for potential solutions.
pod install output:
    [33mWARNING: CocoaPods requires your terminal to be using UTF-8 encoding.

网上找了许多的解决方案，大多是让重装cocoapods（如果你确实没有装可以参考），操作一番都不起作用。
解决方案：

1. CocoaPods 要求您的终端使用 UTF-8 编码。因此需要将以下内容添加到 ~/.profile： export LANG=en_US.UTF-8
2. 如何找到这个文件呢？
   ⌘⇧G（command+shift+G）输入～/.profile，回车即可。
   但是由于这个文件是.开头的，默认隐藏的，可以在目标文件夹下执行⌘⇧. （Cmd+Shift+.）即可切换隐藏文件显示与隐藏。