從網上下載了一個後綴爲png的圖片來做素材,可是在運行的時候Xcode提示
While reading xxx/cone.png pngcrush caught libpng error:
Not a PNG file..
Could not find file: xxx/Library/Developer/Xcode/DerivedData/ButtonDemo-aaazaogsukdulueeuwlsyfjvcsnl/Build/Products/Debug-iphonesimulator/ButtonDemo.app/cone.pngCommand /Applications/Xcode.app/Contents/Developer/usr/bin/copypng emitted errors but did not return a nonzero exit code to indicate failure
原因:這個圖片並不是一個真正的png文件,而是手動修改jpeg後綴名爲png。
解決辦法:使用Mac自動的圖形編輯工具導出爲png文件即可