[英]How do I randomise a repeatAction count?
我有一個永遠重復的SKAction,它會在wave中釋放一個隨機數量的對象但是我似乎無法在SKAction.repeatActionForver中重復每次重復SKAction.repeatAction的計數。 有人知道我的問題的解決方案嗎?
let objectSet = SKAction.repeatAction(SKAction.sequence([addObject,objectDelay]),count: random value ))
let setDelay = SKAction.waitForDuration(2.0, withRange: 1.0)
let objectDelay = SKAction.waitForDuration(0.6, withRange: 0.4)
let objectSet = SKAction.repeatAction(SKAction.sequence([addObject, objectDelay]), count: *Trying to get a random value*))
objectLayerNode.runAction(SKAction.repeatActionForever(SKAction.sequence([objectSet, setDelay])))
謝謝
您可以使用let random = Int(arc4random_uniform(UPPER_BOUND))
。
然后
let objectSet = SKAction.repeatAction(SKAction.sequence([addObject, objectDelay]), count: random))
您還可以執行具有上限和下限的范圍。
let random = LOWER_BOUND + arc4random_uniform(UPPER_BOUND - LOWER_BOUND + 1)
編輯
你可以使用遞歸。 參考
let setDelay = SKAction.waitForDuration(2.0, withRange: 1.0)
let objectDelay = SKAction.waitForDuration(0.6, withRange: 0.4)
func repeat() {
let random = LOWER_BOUND + arc4random_uniform(UPPER_BOUND - LOWER_BOUND + 1)
let objectSet = SKAction.repeatAction(SKAction.sequence([addObject, objectDelay]), count: random))
let sequence = SKAction.sequence([
objectSet, objectDelay,SKAction.runBlock({
[unowned self] in self.repeat()
})
])
objectLayerNode.runAction(sequence)
}
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