动画按钮 Allowuserinteraction 不起作用

问题描述

我在 NSObject 类的代码中创建了一个 UIbutton，它控制 UIViewController 类中的游戏.该按钮在整个游戏的大部分时间都可以正常工作，但在某些时候我希望该按钮淡入/淡出.一旦淡入/淡出开始动画，按钮就不再是交互式的.我已经设置了 .AllowUserInteraction 选项，但仍然没有运气.我被这个难住了，所以非常感谢任何帮助！

I have a UIbutton created in code in an NSObject class which controls a game in a UIViewController class. The button works fine throughout most of the game, but at a certain point I want the button to fadein/out. Once the fadein/out starts animating the button is no longer interactive. I have set the .AllowUserInteraction option, but still no luck. I am stumped on this one, so any help much appreciated!

Class GameController: NSObject {
var gameView: UIView!
var nextButton: UIButton!

func gameViewSetUp() {
    // create the nextButton
    let imageNextButton = UIImage(named: "rightArrow") as UIImage?
    self.nextButton = UIButton(type: .Custom)
    nextButton.frame = CGRectMake(ScreenWidth-100,ScreenHeight-250,60,60)
    nextButton.setTitle("", forState: UIControlState.Normal)
    nextButton.setImage(imageNextButton, forState: .Normal)
    nextButton.contentMode = .ScaleAspectFill
    nextButton.backgroundColor = UIColor.clearColor()
    nextButton.layer.cornerRadius = 5.0
    nextButton.layer.borderWidth = 2.5
    nextButton.layer.borderColor = UIColor.clearColor().CGColor
    nextButton.addTarget(self, action: "nextPressed", forControlEvents: .TouchUpInside)
    nextButton.userInteractionEnabled = true
    gameView.addSubview(nextButton)

func playStageX() { 
       nextButtonWink()
    }
}

func nextButtonWink() {
    UIView.animateWithDuration(1.5, delay: 0, options: [.AllowUserInteraction, .Repeat, .CurveEaseInOut, .Autoreverse],
        animations: {
 // self.nextButton.userInteractionEnabled = true // I tried this as well but no impact.
            self.nextButton.alpha = 0
        }, completion: nil)
}

class GameViewController: UIViewController {
private var controller: GameController
required init?(coder aDecoder: NSCoder) {
    controller = GameController()
    super.init(coder: aDecoder)
}
override func viewDidLoad() {
    super.viewDidLoad()   
    let gameView = UIView(frame: CGRectMake(0, 0, ScreenWidth, ScreenHeight))
    self.view.addSubview(gameView)
    controller.gameView = gameView

}

推荐答案

拿出self.nextButton.alpha = 0来测试一下，相信alpha为零时按钮事件不会触发.当涉及到动画时，实际对象的 alpha 将在动画开始之前设置为零，您所看到的就像动画时视图的渲染交互式屏幕截图

Take out self.nextButton.alpha = 0 to test this out, I believe that button events will not fire when alpha is zero. When it comes to animations, the actual object's alpha will get set to zero before the animation starts, and what you are seeing is like a rendered interactive screenshot of your view as it animates

如果是这种情况，那么您需要将 alpha 设置为 0.0100000003 或覆盖按钮以在 alpha 0 处进行交互

If that is the case, then you need to set the alpha to something like 0.0100000003 or override the button to be interactive at alpha 0

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