创建一个由图标制作的按钮，以便图标填充它

Question

How can I make a button that hasn't any text but just an image as icon? I already tried using imageEdset setting the button this way:

button.imageEdgeInsets = UIImageEdgeInsets(top: 5, left: 5, bottom: 5, right: 5)

But the image appears not centered and stretched

Answer 1

If you want to fill the button, then you should set the contentMode of the UIImageView to .scaleAspectFill .

button.imageView.contentMode = .scaleAspectFill

Warning : This will only show the full image if the image aspect ratio and your imageView aspect ratio match .

If you want the full image to be displayed, then you should set the contentMode to .scaleAspectFit

button.imageView.contentMode = .scaleAspectFit