ios - 快速按下按钮时填充按钮图标

Question

我有一个带图标的按钮，我希望当按下按钮图标时填充颜色，当再次按下时空颜色并返回到之前的状态

注意:我尽可能不希望在每次按下后都更改图标。

Answer 1

这是如何实现的示例，如果您不明白，请告诉我。

class ViewController: UIViewController {

    @IBOutlet weak var someBtn: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()
        configureUI()
    }

    //Setting up images for normal and selected state.
    func configureUI() {
        let image = UIImage(named: "image")
        let imageFilled = UIImage(named: "image-filled")
        someBtn.setImage(image, for: .normal)
        someBtn.setImage(imageFilled, for: .selected)
    }

    @IBAction func someBtnPressed(_ sender: Any) {
        // Toggle basically makes someBtn’s selected state either true or false when pressed
        someBtn.isSelected.toggle()
    }
}