如何将图像设置为NSButton以与按钮一起调整大小？

I have an image (3width x 15height, the first and last pixels are rounded on the corners), and I want to create a button (the height of the button is always the same, 15px, but the width changes) that uses this image no matter what size it is, kinda like I have an image (3width x 15height, the first a