解压ipa 在windows下不能查看图片,在mac下虽然一部分能够查看,但是一些是不能查看的,原因是因为ipa在打包的时候
经过一个叫Pngcrush的家伙做了png优化,所以,我们也可以用这个家伙来反转回来,以供学习之用。
具体的技术细节可以参看Apple的官方技术文档(英文)和Pngcrush的官方网站(英文)。那要如何将这些被优化过的图片“反优化”成可以浏览的图片文件呢?Apple的技术文档中给了相应的方法:
files = Dir.glob("*.png") puts "Creating directory: uncrushed" if File.directory?("uncrushed") puts "Directory already exists... delete and proceed? (y/n)" input = gets.strip if input == "y" deletefiles = Dir.glob("uncrushed/*.png") deletefiles.each do |f| File.delete(f) end Dir.delete("uncrushed") else abort end else end Dir.mkdir("uncrushed") files.each do |f| puts "Found file: #{f}... uncrushing it because we street!" `/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/pngcrush -revert-iphone-optimizations -q #{f} uncrushed/#{f}` puts "Creating new file: #{f}" end