如何在每次重置标题时阻止UIButton突出显示/闪烁？

Question

我使用UIButton作为标签在其标题中显示一些数字.每次调用该函数以重置此按钮的标题时,它都会闪烁.它不会影响功能但会损害用户体验.我想知道是否有办法阻止UIButton突然出现这种突出行为？

提前致谢!

编辑:以下是我只是调用委托方法updateDigits刷新按钮标题的代码.

class ViewController: UIViewController, UIPopoverPresentationControllerDelegate, DigitsEntryViewDelegate {

    @IBOutlet weak var tipField1: UIButton!
    @IBOutlet weak var tipField2: UIButton!

    var buttonsArray = [UIButton]()

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        self.tipField1.tag = 0
        self.tipField2.tag = 1

        self.tipField1.addTarget(self, action: "inputFieldClicked:", forControlEvents: UIControlEvents.TouchUpInside)
        self.tipField2.addTarget(self, action: "inputFieldClicked:", forControlEvents: UIControlEvents.TouchUpInside)

        self.buttonsArray.append(self.tipField1)
        self.buttonsArray.append(self.tipField2)
    }


    func inputFieldClicked(sender: UIButton) {
        let anchor: UIView = sender

        let viewControllerForPopover = UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("DigitEnter") as! DigitsEntryViewController

        // set popover API values
        viewControllerForPopover.currentDigitsString = sender.currentTitle
        viewControllerForPopover.tagNumber = sender.tag

        viewControllerForPopover.delegate = self
        viewControllerForPopover.preferredContentSize = CGSizeMake(240, 320)
        let popover = UIPopoverController(contentViewController:viewControllerForPopover)
        popover.presentPopoverFromRect(anchor.frame, inView: anchor.superview!, permittedArrowDirections: UIPopoverArrowDirection.Down, animated: false)
    }

    func updateDigits(returnedDigits: String, tagNumber: Int) {
        self.buttonsArray[tagNumber].setTitle(returnedDigits, forState: UIControlState.Normal)
    }
}

Answer 1

尝试将按钮类型设置为自定义,而不是系统.