Why does a custom UIButton image does not resize in Interface Builder?

Question

Why does a custom UIButton image not resize with the button?

I set its view mode to Scale to Fill in Interface Builder, but unlike a UIImageView image, it d

Answer 1

Just do (From Design OR From Code):

From Design

1. Open your xib OR Storyboard.
2. Select button
3. Inside Attribute Inspector (Right side) > In "Control" section > select last 4th option for both Horizontal and Verical.

[For Point#3: Change Horizontal and vertical Align to UIControlContentHorizontalAlignmentFill and UIControlContentVericalAlignmentFill]

From Code

button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentFill; button.contentVerticalAlignment = UIControlContentVerticalAlignmentFill;