在Swift中爲Sprite創建隨機位置

Question

我有一個圓形精靈，我想移動到iOS設備屏幕範圍內的隨機位置。我試圖在Swift中做到這一點，但我仍然是初學者，我甚至不知道從哪裏開始。有誰知道如何爲精靈創建隨機位置？先謝謝你！

-Vinny

Answer 1

讓我們假設你是從場景類調用代碼：

func spawnAtRandomPosition() { 
    let height = self.view!.frame.height 
    let width = self.view!.frame.width 

    let randomPosition = CGPointMake(CGFloat(arc4random()) % height, CGFloat(arc4random()) % width) 

    let sprite = SKSpriteNode() 
    sprite.position = randomPosition 
} 

Answer 2

斯威夫特3：

func spawnRandomPosition() { 

let height = self.view!.frame.height 
let width = self.view!.frame.width 

let randomPosition = CGPoint(x:CGFloat(arc4random()).truncatingRemainder(dividingBy: height), 
           y: CGFloat(arc4random()).truncatingRemainder(dividingBy: width)) 

let sprite = SKSpriteNode() 
sprite.position = randomPosition 
} 

Answer 3

斯威夫特3：

let randomPosition = CGPoint(x:CGFloat(arc4random_uniform(UInt32(floor(width )))), 
           y:CGFloat(arc4random_uniform(UInt32(floor(height)))) 
          )