ios - SpriteKit 动画
<p><p>我需要你的建议，我是 SpriteKit 的新手，我需要制作动画片段。我有 3 种解决方案可以实现，但我需要更好且成本更低的 CPU 建议。</p>
<ul>
<li>1 解决方案:每个 strip- 带有动画和纹理的 SKSpriteNode</li>
<li>2 解决方案:背景视频</li>
<li>3 解决方案:每个 strip- 带有动画的 SKShapeNode</li>
</ul>
<p> <a href="/image/kzeoI.png" rel="noreferrer noopener nofollow"><img src="/image/kzeoI.png" alt="enter image description here"/></a> </p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>这是一个简单的任务，你不需要构建图集动画或使用<code>SKShapeNode</code>，你可以使用<code>SKSpriteNode</code>作为这个代码:</p>
<pre><code>var bar = SKSpriteNode(color: SKColor.greenColor(), size: CGSizeMake(40, 200))
barra.position = CGPoint(x: CGRectGetMidX(self.frame), y: CGRectGetMidY(self.frame))
self.addChild(barra)
</code></pre>
<p>构建 n 个随机大小的条，并使用 <code>SKAction</code> 移动它们。</p>
<p>使用这种方法，您的动画每次启动都会有所不同。</p>
<p><strong>代码详解</strong>:</p>
<pre><code>class GameScene: SKScene {
var bars: !
var totBars : Int = 50
override func didMoveToView(view: SKView) {
self.backgroundColor = SKColor(red: 131/255, green: 190/255, blue: 177/255, alpha: 1)
let redBarColor = SKColor(red: 204/255, green: 75/255, blue: 75/255, alpha: 1)
let yellowBar = SKColor(red: 253/255, green: 242/255, blue: 160/255, alpha: 1)
// add here your colors
var colorSelected:SKColor = redBarColor
bars = ()
for i in 0..<totBars-1 {
let colorNum = randomNumber(1...2)
switch (colorNum) {
case 1:
colorSelected = redBarColor
case 2:
colorSelected = yellowBar
default:
break
}
let randomWidth = randomCGFloat(5,max:40)
let randomHeight = randomCGFloat(30,max:400)
let bar = SKSpriteNode.init(color: colorSelected, size: CGSizeMake(randomWidth, randomHeight))
bar.zRotation = -45 * CGFloat(M_PI / 180.0)
bar.name = "bar\(i)"
self.addChild(bar)
bars.append(bar)
}
animateBars()
}
func animateBar(bar:SKSpriteNode) {
print("- \(bar.name) start!")
let deltaX = self.randomCGFloat(0,max:self.frame.maxX)
let deltaY:CGFloat= self.frame.maxY/2
let rightPoint = CGPointMake(self.frame.maxX + deltaX,self.frame.maxY + deltaY)
let leftPoint = CGPointMake(-self.frame.maxX + deltaX,-self.frame.maxY + deltaY)
bar.position = rightPoint
let waitBeforeExit = SKAction.waitForDuration(Double(self.randomCGFloat(1.0,max:2.0)))
let speed = self.randomCGFloat(150,max:300)
let move = SKAction.moveTo(leftPoint, duration: self.getDuration(rightPoint, pointB: leftPoint, speed: speed))
bar.runAction(SKAction.sequence(), completion: {
print("\(bar.name) reached position")
self.animateBar(bar)
})
}
func animateBars() {
for bar in bars {
animateBar(bar)
}
}
func getDuration(pointA:CGPoint,pointB:CGPoint,speed:CGFloat)->NSTimeInterval {
let xDist = (pointB.x - pointA.x)
let yDist = (pointB.y - pointA.y)
let distance = sqrt((xDist * xDist) + (yDist * yDist));
let duration : NSTimeInterval = NSTimeInterval(distance/speed)
return duration
}
func randomCGFloat(min: CGFloat, max: CGFloat) -> CGFloat {
return CGFloat(Float(arc4random()) / Float(UINT32_MAX)) * (max - min) + min
}
func randomNumber(range: Range<Int> = 1...6) -> Int {
let min = range.startIndex
let max = range.endIndex
return Int(arc4random_uniform(UInt32(max - min))) + min
}
}
</code></pre></p>
<p style="font-size: 20px;">关于ios - SpriteKit 动画，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/38550388/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/38550388/
</a>
</p>
页:
[1]