Swift - UIButton not highlighted while pressed

Question

I am having a problem when adding a UIButton programatically. There is no "tap-animation".

Does anyone know why that occurs and how to fix this? I couldn't find anything on this topic...

let weiterButton: UIButton = {
    let v = UIButton()
    v.translatesAutoresizingMaskIntoConstraints = false
    v.setTitle("WEITER", for: .normal)
    v.titleLabel?.font = UIFont(name: "AvenirNext-Bold", size: 20)
    v.titleLabel?.textColor = .white
    v.backgroundColor = UIColor(red: 75/255, green: 75/255, blue: 75/255, alpha: 1)
    v.addTarget(self, action: #selector(weiterButtonTapped), for: .touchUpInside)
    return v
}()

Animation I would like to have:

Animation

did u try applying colours for states highlighted / pressed ? — Teja Nandamuri, Jan 20 '20 at 20:08
no. I just want the standard tap animation. It seems like it is working when adding a `backgroundImage` but I also want the animation without an `image` .. — Chris, Jan 20 '20 at 20:16
@TejaNandamuri is right. You need to add custom colours of text for highlighted states, e.g. just add this line `v.setTitleColor(.red, for: .highlighted)` — AlexSmet, Jan 20 '20 at 20:23
but `backgroundColor` should be changed and not `TitleColor`. — Chris, Jan 20 '20 at 20:34
Does this answer your question? [How to change the background color of a UIButton while it's highlighted?](https://stackoverflow.com/questions/14523348/how-to-change-the-background-color-of-a-uibutton-while-its-highlighted) — koen, Jan 20 '20 at 20:52
See https://stackoverflow.com/questions/14523348/how-to-change-the-background-color-of-a-uibutton-while-its-highlighted — AlexSmet, Jan 20 '20 at 20:53

Daveloper · Accepted Answer · 2020-01-20T21:03:18.570

2

You have to set lazy var instead of let because you want to get out of your variable(button). Also, you have to set UIButton(type: .system) because you tell that button should have some kind of style.

lazy var weiterButton: UIButton = {
    let v = UIButton(type: .system)
    v.translatesAutoresizingMaskIntoConstraints = false
    v.setTitle("WEITER", for: .normal)
    v.titleLabel?.font = UIFont(name: "AvenirNext-Bold", size: 20)
    v.setTitleColor(.white, for: .normal)
    // If you want a different color when it is pressed
    v.setBackgroundImage(UIImage(named: "Hlighlighted image"), for: .highlighted)
    v.setBackgroundImage(UIImage(named: "Your image"), for: .normal)
    v.addTarget(self, action: #selector(weiterButtonTapped), for: .touchUpInside)
    return v
}()

edited Jan 20 '20 at 21:03

answered Jan 20 '20 at 20:13

Daveloper

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changing it to `lazy var` didn't do anything – Chris Jan 20 '20 at 20:15
It is weird. Do you have an @objc func? – Daveloper Jan 20 '20 at 20:17
yep, which is working just like it should. I am having this problem with other `UIButtons` as well – Chris Jan 20 '20 at 20:17
Don't you have something wrong in your ViewController? – Daveloper Jan 20 '20 at 20:18
You mentioned that other UIButtons don't work as well. Are your Buttons in the same ViewController or it is in another ViewController? – Daveloper Jan 20 '20 at 20:20
in another ViewController – Chris Jan 20 '20 at 20:20
Try to add one more button to the same ViewController. – Daveloper Jan 20 '20 at 20:21
Well... You have to set UIButton(type: .system) – Daveloper Jan 20 '20 at 20:24
where do I have to set that? – Chris Jan 20 '20 at 20:28
let v = UIButton(type: .system) Look at my edited post – Daveloper Jan 20 '20 at 20:28
that changes `titleColor` to blue and the it is getting highlighted but that's not what I want – Chris Jan 20 '20 at 20:33
@Daveloper If you mean that this weak variable is reset to nil, you could wrong, because you don't see other parts of source code. – AlexSmet Jan 20 '20 at 20:35
@Daveloper Assuming this is declared in a class, the declaration should look like this: `lazy var weiterButton: UIButton = { [weak self] in` to prevent memory leaks. – Adrian Jan 20 '20 at 21:30

Swift - UIButton not highlighted while pressed

1 Answers1