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[英]How to set a custom cursor in an SKScene? (XCode, Swift4, Spritekit)
[英]Stop a movement in SpriteKit swift4 Xcode and set a timer to switch Players
如何停止我創建的動態球,但將其鎖定在目標中,但是在移動了一點之后就應該停止它們,以便我可以將播放器切換到另一個(如果不是目標),則球會繼續移動,而Im會切換玩家? 請幫助!
您是在進行足球比賽還是類似的工作? 如果是這樣,您可以在SKScene的Update()函數中編寫代碼。 我認為沒有必要設置計時器。 例如,如果是足球比賽,則可以使用SKPhysicsBody構造一個球,就像在繼承自SKScene的GameScene類中那樣
let ballNode = SKSpriteNode(imageNamed: "ball.png")
var players: [SKSpriteNode]!
func buildBall() {
addChild(ballNode)
ballNode.name = "Ball"
ballNode.physicsBody = SKPhysicsBody(texture: ballNode.texture!, size: ballNode.size)
ballNode.physicsBody?.affectedByGravity = false
}
那么您可以使用其名為Velocity()的屬性來移動球,如下所示:
func moveBall(velocity: CGVector) {
ballNode.physicsBody?.velocity = velocity
}
然后建立玩家:
func buildPlayers() {
for i in 0...10 {
let playerNode = SKSpriteNode(fileNamed: "player.png")
addChild(playerNode)
players.append(playerNode)
playerNode.physicsBody = SKPhysicsBody(texture: playerNode.texture!, size: playerNode.size)
playerNode.physicsBody?.affectedByGravity = false
}
}
然后,您可以在update()方法中編寫代碼:
override func update(_ currentTime: TimeInterval) {
var nearestPlayer: SKSpriteNode!
var distance = 9999999
for player in players {
let temp = sqrt((player.position.x - ballNode.position.x) * (player.position.x - ballNode.position.x) + (player.position.y - ballNode.position.y) * (player.position.y - ballNode.position.y))// calculate the distance
if temp < distance {
nearestPlayer = player //Get the nearestPlayer
distance = temp
}
}
switchPlayer(player: nearestPlayer)//This is a switchPlayer method which I didn't defined
}
要停止球,只需將球的速度設置為CGVector(dx:0,dy:0)。
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