copypng emitted errors but did not return a nonzero exit code to indicate failure

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CopyPNGFile /Users/DongDong/Library/Developer/Xcode/DerivedData/TripMaster-bxfcclejoszkcnahqrdmqxcxbrib/Build/Products/Debug-iphoneos/TripMaster.app/carZFB@2x.png TripMaster/Image/bank/carZFB@2x.png

    cd /Users/DongDong/Desktop/行程大师/tripmaster

    export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"

    /Applications/Xcode.app/Contents/Developer/usr/bin/copypng -compress /Users/DongDong/Desktop/行程大师/tripmaster/TripMaster/Image/bank/carZFB@2x.png /Users/DongDong/Library/Developer/Xcode/DerivedData/TripMaster-bxfcclejoszkcnahqrdmqxcxbrib/Build/Products/Debug-iphoneos/TripMaster.app/carZFB@2x.png



While reading /Users/DongDong/Desktop/行程大师/tripmaster/TripMaster/Image/bank/carZFB@2x.png pngcrush caught libpng error:

   Read Error


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








解决办法:
把工程中,Build Settings - Compress PNG files 设置为NO即可。
原因可能你的图本来就是被压缩过的 

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