filename="xx.png"

dirname="cutimg"

name_array=("icon20@1x.png""icon20@2x-1.png""icon20@2x.png""icon20@3x.png""icon29@1x-1.png""icon29@1x.png""icon29@2x-1.png""icon29@2x.png""icon29@3x.png""icon40@1x.png""icon40@2x.png""icon40@2x-1.png""icon40@3x.png""icon57@1x.png""icon57@2x.png""icon60@2x.png""icon76@1x.png""icon83.5@2x.png""icon60@3x.png""icon76@2x.png")

size_array=("20""40""40""60""29""29""58""58""87""40""80""80""120""57""114""120""76""167""180""152")

mkdir $dirname

for((i=0;i<${#name_array[@]};++i)); do

m_dir=$dirname/${name_array[i]}

cp $filename $m_dir

sips -Z ${size_array[i]} $m_dir

done