运行的时候出现了这个问题

/Users/yunkan/Library/Developer/Xcode/DerivedData/VideoBeautify-fuyvojgjdmbsrqftvhovtnmuafbe/Build/Intermediates/GPUImage.build/Debug-iphonesimulator/Documentation.build/Script-BC552B3A1558C6FC001F3FFA.sh: line 5: /usr/local/bin/appledoc: No such file or directory

不懂为啥！新手，希望您帮忙看看...
