Command /Applications/Xcode-beta.app/Contents/Developer/usr/bin/copypng emitted errors but did not return a nonzero exit code to indicate failure

While reading /Users/hskj/Desktop/东城新闻项目/DongchengEducationNews/DongchengEducationNews/东城项目/模块切图/2新闻界面/默认缩略图@3x.png pngcrush caught libpng error:
   
\2458\240
\245\202\221_\237\370\324\375\277\224_\237\374\256
\245\370\245
\245i

Command /Applications/Xcode-beta.app/Contents/Developer/usr/bin/copypng emitted errors but did not return a nonzero exit code to indicate failure

解决方案：把工程中，Compress PNG files 设置为NO即可。