Question

我基于数组计数以编程方式在scrollview上添加了多个UIButton，直到这个工作正常。要求只选择按钮文字标题颜色应改为棕色，保持蓝色。我无法解决这一个请使用Swift 3的一些帮助。我只需要选择或点击按钮文本标题颜色需要更改保持所有都是其余的颜色。

           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@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
}

Answer 2

创建选择器时需要传递按钮的引用，以便可以与其他按钮进行比较并更改isSelected状态

buttonTitle.addTarget(self, action: #selector(ViewController.buttonTitleAction(_:)), for: .touchUpInside) //将ViewController替换为您的ViewController名称

func buttonTitleAction(_ sender: UIButton) {
      arrayTitleButtons.forEach { (button) in
           if button == sender {
               button.isSelected = true
               sender.setTitleColor(UIColor.brown, for: .selected)
           } else {
                button.isSelected = false
           }
        }
  }

选定/单击的UIButton文本标题颜色需要以编程方式从scrollview上的按钮数更改

2 个答案: