How to change button image in swift?

Question

I am working on an app which has a button. The button has no text, image or background.

So what I want to do is to give it an image in the viewDidLoad function.

This is what I have:

@IBOutlet var tapButton: UIButton!

override func viewDidLoad() {

    super.viewDidLoad()

    tapButton.setImage("redTap.png", forState: UIControlState.Normal)
}

But I have an error that says I can not convert string to UIIMage.

How do I get it to work?

I have tried:

let image = UIImage(named: "redTap.png")

tapButton.setImage(image, forState: UIControlState.Normal)

I have gotten it to work but now I have a problem.

The image is suppose to be a red text but it shows up blue.

I was able to get the image to show correctly by using:

let image = UIImage(named: imageColor[randNum])?.imageWithRenderingMode(.AlwaysOriginal)
tapButton.setImage(image, forState: UIControlState.Normal)

What I want now is to not have the button be highlighted when the button is pressed. I have a few other buttons that have images assigned to them in xcode and not through code. They don't highlight when pressed.

So how can I get rid of highlighting when the button is pressed?

Answer 1

You don't need ".png".

If ".imageWithRenderingMode(.AlwaysOriginal)" is working for you: To keep the same image in different states, you have to set the same image/properties for the different states.

@IBOutlet var tapButton: UIButton!

override func viewDidLoad() {
    super.viewDidLoad()

    tapButton.setImage(UIImage(named: "redTap")?.imageWithRenderingMode(.AlwaysOriginal), forState: .Normal)
    tapButton.setImage(UIImage(named: "redTap")?.imageWithRenderingMode(.AlwaysOriginal), forState: .Highlighted)
}