挺邪恶的，直接看人家的图片资源，无奈个人艺术设计实力实在不强，只好借鉴下比较好的app了。
在编译打包到app的过程中，原有的png都被在最后加上了特定都数据段，这样从app里直接取出来图片既不能看，也不能用，所以需要工具来进行还原。
所幸，伟大的开源界已经提供了这样的pyhton脚本：
http://www.axelbrz.com.ar/?mod=iphone-png-images-normalizer
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 | #--- # iPIN - iPhone PNG Images Normalizer v1.0 # Copyright (C) 2007 # # Author: # Axel E. Brzostowski # http://www.axelbrz.com.ar/ # axelbrz@gmail.com # # References: # http://iphone.fiveforty.net/wiki/index.php/PNG_Images # http://www.libpng.org/pub/png/spec/1.2/PNG-Contents.html # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # #--- from struct import * from zlib import * import stat import sys import os def getNormalizedPNG(filename): pngheader = "\x89PNG\r\n\x1a\n" file = open(filename, "rb") oldPNG = file.read() file.close() if oldPNG[:8] != pngheader: return None newPNG = oldPNG[:8] chunkPos = len(newPNG) # For each chunk in the PNG file while chunkPos < len(oldPNG): # Reading chunk chunkLength = oldPNG[chunkPos:chunkPos+4] chunkLength = unpack(">L", chunkLength)[0] chunkType = oldPNG[chunkPos+4 : chunkPos+8] chunkData = oldPNG[chunkPos+8:chunkPos+8+chunkLength] chunkCRC = oldPNG[chunkPos+chunkLength+8:chunkPos+chunkLength+12] chunkCRC = unpack(">L", chunkCRC)[0] chunkPos += chunkLength + 12 # Parsing the header chunk if chunkType == "IHDR": width = unpack(">L", chunkData[0:4])[0] height = unpack(">L", chunkData[4:8])[0] # Parsing the image chunk if chunkType == "IDAT": try: # Uncompressing the image chunk bufSize = width * height * 4 + height chunkData = decompress( chunkData, -8, bufSize) except Exception, e: # The PNG image is normalized return None # Swapping red & blue bytes for each pixel newdata = "" for y in xrange(height): i = len(newdata) newdata += chunkData[i] for x in xrange(width): i = len(newdata) newdata += chunkData[i+2] newdata += chunkData[i+1] newdata += chunkData[i+0] newdata += chunkData[i+3] # Compressing the image chunk chunkData = newdata chunkData = compress( chunkData ) chunkLength = len( chunkData ) chunkCRC = crc32(chunkType) chunkCRC = crc32(chunkData, chunkCRC) chunkCRC = (chunkCRC + 0x100000000) % 0x100000000 # Removing CgBI chunk if chunkType != "CgBI": newPNG += pack(">L", chunkLength) newPNG += chunkType if chunkLength > 0: newPNG += chunkData newPNG += pack(">L", chunkCRC) # Stopping the PNG file parsing if chunkType == "IEND": break return newPNG def updatePNG(filename): data = getNormalizedPNG(filename) if data != None: file = open(filename, "wb") file.write(data) file.close() return True return data def getFiles(base): global _dirs global _pngs if base == ".": _dirs = [] _pngs = [] if base in _dirs: return files = os.listdir(base) for file in files: filepath = os.path.join(base, file) try: st = os.lstat(filepath) except os.error: continue if stat.S_ISDIR(st.st_mode): if not filepath in _dirs: getFiles(filepath) _dirs.append( filepath ) elif file[-4:].lower() == ".png": if not filepath in _pngs: _pngs.append( filepath ) if base == ".": return _dirs, _pngs print "-----------------------------------" print " iPhone PNG Images Normalizer v1.0" print "-----------------------------------" print " " print "[+] Searching PNG files...", dirs, pngs = getFiles(".") print "ok" if len(pngs) == 0: print " " print "[!] Alert: There are no PNG files found. Move this python file to the folder that contains the PNG files to normalize." exit() print " " print " - %d PNG files were found at this folder (and subfolders)." % len(pngs) print " " while True: normalize = raw_input("[?] Do you want to normalize all images (Y/N)? ").lower() if len(normalize) > 0 and (normalize[0] == "y" or normalize[0] == "n"): break normalized = 0 if normalize[0] == "y": for ipng in xrange(len(pngs)): perc = (float(ipng) / len(pngs)) * 100.0 print "%.2f%% %s" % (perc, pngs[ipng]) if updatePNG(pngs[ipng]): normalized += 1 print " " print "[+] %d PNG files were normalized." % normalized |
以QQ阅读1.5.1的ipa为例，先进入解压后的app目录， 同样实在终端进行操作，将python脚本命名为pickUpPng.py
$mv pickUpPng.py /usr/bin
将基本放入到/usr/bin目录，方便日后使用和操作
在app目录下
$mkdir realPng
$mv *.png realPng
$cd realPng
$python pickUpPng.py
这样就可以将所有png图片还原回去，并且如果需要直接查看的话可以使用open command。