Let's say I have this sprite for a UIButton:

I would like to know how I can stretch its center, so the button may look like this for a smaller button:

Or like this for a bigger one:

Thank you for your help!

CodePudding user response：

you can use background-size: 100% 100%; which will stretch image and mess up proportions or background-size: cover; which will scale image, preserve proportions and crop the image