改了一个shell 把APP里的全部png用 pngquant压缩一下

#!/bin/bash

function walk()
{
for file in `ls $1`
do
local path=$1"/"$file
if [ -d $path ]
then
#echo "DIR $path"
walk $path
else
local fv=${file##*.}
local fb="png"
if [ "$fv"x = "$fb"x ]
then
"~/"pngquant -f --ext .png --quality 80-80 $path
echo $file
fi
fi
done
}

if [ $# -ne 1 ]
then
echo "USAGE: $0 TOP_DIR"
else
walk $1
fi