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Xcode – What is the difference between `UIbutton.setImage` and changing `UIbutton.imageView`?

What is the difference between UIbutton.setImage and changing UIbutton.imageView?

buttonA.imageView?.image = UIImage(named: "name")

buttonA.setImage(UIImage(named: "name"), for: .normal)

When I try to use setImage and then try to get it’s position using frame.origin.x, the position returned are not what I expected and so I used .imageView?.image approach. But when I use that, I observed that clicking on the button changes the image for a brief time before continuing.

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  1. 0
    1. the function offers you the ability to set different icons for various states
        setImage(imageNormal, for: .normal) //normal state
    setImage(disabledImage, for: .disabled) //disable UI representation
    1. UIButton.imageView according to documentation read-only property https://developer.apple.com/documentation/uikit/uibutton/1624033-imageview
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  2. 0

    For some clarification…

    If you set the .image property directly:

    buttonA.imageView?.image = UIImage(named: "name")

    You have not informed the button class that it has a new image property.

    The same thing applies to setting the title:

    buttonA.titleLabel?.text = "My Title"

    That will change the text of the title label, but only until the next UI update… at which point UIKit will use the value assigned via:

    buttonA.setTitle("Button A", for: .normal)

    That’s why it’s important to use both .setImage(...) and .setTitle(...) instead of setting the property itself.

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