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

While this may not be quite what you're after - the background image does scale.

Answer 2

Just get a real UIimageview and place a UIbutton on top of it and via layout menu set it to back. Then you can scale your image properly.

Answer 3

I know this is old, but I think that the correct answer is that you should set the content mode to the "hidden" UIImageView that is inside the UIButton:

button.imageView.contentMode = UIViewContentModeScaleAspectFill;

This will change the content mode for the images views of the images set with:

[button setImage:yourAwesomeImage forState:UIControlStateNormal]; 
//Or any other state

Answer 4

Try setting the Clip subviews property in Interface Builder to true.

Hope that helps.

Answer 5

The best solution I found so far in Swift 2.1 is the following:

self.imageButton.imageView?.clipsToBounds = true
self.imageButton.imageView?.contentMode = UIViewContentMode.ScaleAspectFit

This will scale the image so it has an aspect fit in the imageView.

Answer 6

Interface Builder

To get images in UIButtons to scale the same way as UIViews in interface Builder follow these steps:

Select your UIButton and from the Identity Inspector add the following to User Defined Runtime Attributes:

imageView.contentMode Number 1

Where number is the enum number of contentMode, eg:

0 = Scale to fill 
1 = Aspect Fit 
2 = Aspect Fill
etc..

Then open the Attributes editor for your UIButton and under Control set the Alignment to Fill (last button on right) for both horizontal and vertical.

SWIFT 3

Note you can also do this in code with the following:

button.imageView?.contentMode = .scaleAspectFit
button.contentVerticalAlignment = .fill
button.contentHorizontalAlignment = .fill