50 iOS路径照片随机到相册

function exec(command)
    local res = io.popen(command);
    if res then
        local ret = res:read("*a");
        res:close();
        return ret;
    else
        return -1;
    end
end
function Split(szFullString, szSeparator)
    local nFindStartIndex = 1
    local nSplitIndex = 1
    local nSplitArray = {}
    while true do
       local nFindLastIndex = string.find(szFullString, szSeparator, nFindStartIndex)
       if not nFindLastIndex then
        nSplitArray[nSplitIndex] = string.sub(szFullString, nFindStartIndex, string.len(szFullString))
        break
       end
       nSplitArray[nSplitIndex] = string.sub(szFullString, nFindStartIndex, nFindLastIndex - 1)
       nFindStartIndex = nFindLastIndex + string.len(szSeparator)
       nSplitIndex = nSplitIndex + 1
    end
    return nSplitArray
end
function cleanPhoto()
    exec("rm -rf /private/var/mobile/Media/PhotoData/*")
    exec("rm -rf /private/var/mobile/Media/DCIM/*")
    appKill("com.apple.mobileslideshow")
end
function main()
    math.randomseed(tostring(os.time()):sub(5):reverse()); -- 随机种子
    cleanPhoto() -- 清空相册
    mSleep(1000)
    local f = "/var/touchelf/" --图片目录
    local list = exec(string.format( "find %s -name *.png", f))
    local listTable = Split(list,'\n')
    table.remove(listTable)
    if #listTable > 0 then
        local pic = listTable[math.random(1,#listTable)]
        local resize = math.random(100,200) --随机缩放范围.自己修改
        logDebug(pic)
        imageResize(pic,resize,resize) --图片缩放
        saveImageToAlbum(pic)
    else 
        logDebug("文件夹内无图片")
    end
end