说明 libpng-1.6.37 https://sourceforge.net/projects/libpng/files/libpng16/1.6.37/ libjpeg-9d http://www.ijg.org/files/ libjpeg-turbo-2.0.6 https://github.com/libjpeg-turbo/libjpeg-turbo/tags CImg https://github.com/dtschump/CImg uCrop-2.2.6 https://github.com/Yalantis/uCrop