ios - 选定/单击的 UIButton 文本标题颜色需要以编程方式从 ScrollView 上的按钮数量更改

Question

我根据数组计数以编程方式在 scrollview 上添加了 UIButtons 的数量，直到它工作正常为止。要求只是选中的按钮文字标题颜色应该变成棕色，保持为蓝色。我无法解决这个问题，请有人帮助使用 Swift 3。我只需要更改选定或单击的按钮文本标题颜色，其余颜色保持不变。

           for titles in arrayPageTitles {
        var titleSize: CGSize = (titles as AnyObject).size(attributes: [NSFontAttributeName: UIFont.systemFont(ofSize: 14.0)])
        titleSize = CGSize(width: CGFloat(ceilf(Float(titleSize.width))), height: CGFloat(ceilf(Float(titleSize.height))));

        /**
            creating top page strip tab Buttons
         */

        buttonTitle = UIButton(type: UIButtonType.custom)
        buttonTitle = UIButton(frame: CGRect(x: buttonPositionX + 5, y: 10, width: titleSize.width+40, height: (scrollViewTop?.frame.size.height)! - 20))
        buttonTitle.setTitle(titles, for: .normal)
        buttonTitle.setTitleColor(UIColor.blue, for: .normal)
        buttonTitle.setTitleColor(UIColor.white, for: .selected       

        buttonTitle.clipsToBounds = true
        buttonTitle.layer.masksToBounds = true
        buttonTitle.layer.cornerRadius = 17
        buttonTitle.layer.borderWidth = 1
        buttonTitle.layer.borderColor = UIColor.darkGray.cgColor

        buttonTitle.tag = increaseIndex
        buttonTitle.addTarget(self, action: #selector(buttonTitleAction), for: .touchUpInside)

        arrayTitleButtons .add(buttonTitle)
        scrollViewTop?.addSubview(buttonTitle)
        let currentButtonX:CGFloat = buttonPositionX
        let buttonWidth:CGFloat = buttonTitle.frame.size.width
        buttonPositionX = currentButtonX + buttonWidth + 10

        if arrayPageTitles.first == titles  {

            viewLine.frame = CGRect(x: buttonTitle.frame.origin.x, y: buttonTitle.frame.origin.y, width: buttonTitle.frame.size.width, height: buttonTitle.frame.size.height)

            viewLine.layer.cornerRadius = 17
            viewLine.clipsToBounds = true
            viewLine.layer.masksToBounds = true

            viewLine.backgroundColor = UIColor.red
            scrollViewTop?.addSubview(viewLine)
            scrollViewTop?.addSubview(buttonTitle) // need to fix ... this add only first button
            buttonTitle.setTitleColor(UIColor.white, for: .normal)
        }

        /**
            creating collection views
         */
        let storyBoard = UIStoryboard(name:"Main", bundle:nil)
        let pageStripTypeViewController = storyBoard.instantiateViewController(withIdentifier: "kPageStripVC") as! FirstViewController

....

Answer 1

您可以在您的@IBAction 中更改发件人的选择状态，如下所示:

@IBAction func buttonAction(_ sender: UIButton) {
    // create an array of buttons
    var mybuttonArray: [UIButton] = view.subviews.filter{$0 is UIButton} as! [UIButton]
    // filter it down to buttons that aren't the sender
    mybuttonArray = mybuttonArray.filter{$0 != sender}

    // figure out of it's selected
    mybuttonArray.forEach({ button in
        if button.isSelected {
            // unselected it
            button.isSelected = false
        }
    })

    // select the sender's button
    sender.isSelected = !sender.isSelected

    // whatever else you need to
}