Swift：背景颜色渐变动画（SpriteKit） [英] Swift : Background Color fading animation (SpriteKit)

问题描述

我正在创建一个游戏，因此背景颜色为白色：

I'm creating a game, the background color is white to begin with hence:

self.backgroundColor = SKColor.whiteColor()

因此，当游戏启动白色时是背景。我有一个评分系统，所以基本上我希望颜色在达到某个分数时改变：

So when the game initiates white is the background. I have a scoring system, so essentially I want the colors to change when a certain score is reached hence:

if score < 100{
            enemy.runAction(SKAction.moveTo(mainBall.position, duration:3))  
        }
        else if score >= 100 && score < 200{
            enemy.runAction(SKAction.moveTo(mainBall.position, duration:2.5))
            self.backgroundColor = SKColor.purpleColor()
        }
        else if score >= 200 && score < 300{
            enemy.runAction(SKAction.moveTo(mainBall.position, duration:2))
            self.backgroundColor = SKColor.greenColor()
        }

然而，这种方法非常笨重，如果我诚实的话，看起来非常糟糕。我的游戏中的所有内容都是流畅的，并且在使用以下方式从场景中删除时包含淡入淡出：

however, this method is very clunky and looks pretty awful if I'm honest. Everything in my game is fluid and contains fades when being removed from the scene using:

livesLabel.runAction(SKAction.fadeInWithDuration(0.5))

但我不确定如何使用背景颜色进行此操作。如果我在backgroundColor中使用上面的例子，例如

But I am unsure as to how I would proceed to do this with the background color. If I use the above example with backgroundColor such as

self.backgroundColor = SKAction.fadeInWithDuration(SKColor.purpleColor())

我收到错误无法使用'（UIColor）'的参数列表调用'fadeInWithDuration'

I get the error "Cannot invoke 'fadeInWithDuration' with an argument list of type '(UIColor)'"

注意：我完全理解尝试将背景颜色分配给动画是愚蠢的。但我把那些代码放在那里尝试解决我的问题

Note: I understand completely that attempting to assign the background color to an animation is silly. But I put that code in there to try get my problem across

推荐答案

从当前背景色平滑过渡到另一种颜色，使用 colorizeWithColor SKAction 。这是一个例子...

To smoothly transition from the current background color to a different color, use the colorizeWithColor SKAction. Here's an example...

runAction(SKAction.colorizeWithColor(SKColor.purpleColor(), colorBlendFactor: 1.0, duration: 2.0))

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