Question

我一直在玩XCode / Swift的一些功能并构建一个简单的游戏。我在将一个physicsBody添加到SKSpriteNode时遇到了困难。我创造了一个子弹＆＃39;班级和坦克＆＃39; class（其数组为10＆＃39; Bullets＆＃39;作为其属性之一）。

正在使用纹理正确分配sprite属性。然而，物理学的身体又回来了。

class Tank {
var position = CGPoint()
var speed = CGPoint(x: 0, y: 0)
var sprite = SKSpriteNode()
var viewSize = CGPoint()    // width, height
var bullets: [Bullet] = []
var bulletNumber = 0
let TOTAL_BULLETS = 10

// ***Tank class constructor
init(playerNum: Int, filename: NSString, tankName: NSString) {
    var spaceshipTexture = SKTexture(imageNamed: "Spaceship")
    self.sprite = SKSpriteNode(texture: spaceshipTexture, size: spaceshipTexture.size())
    self.sprite.physicsBody? = SKPhysicsBody(texture: spaceshipTexture, size: spaceshipTexture.size())
    println(self.sprite.physicsBody)

}

// ****Bullet class 
class Bullet {
var position = CGPoint(x: -50, y: -50)
var speed = CGPoint(x: 0, y: 0)
var sprite = SKSpriteNode()
var viewSize = CGPoint()    // width, height
var isBeingFired = false

init () {
    //self.sprite = SKSpriteNode(imageNamed: "Bullet")
    var spaceshipTexture = SKTexture(imageNamed: "Spaceship")
    self.sprite = SKSpriteNode(texture: spaceshipTexture, size: spaceshipTexture.size())
    self.sprite.xScale = 0.04
    self.sprite.yScale = 0.04
    self.sprite.physicsBody? = SKPhysicsBody(texture: spaceshipTexture, size: spaceshipTexture.size())
    self.sprite.physicsBody?.affectedByGravity = false
    println(self.sprite.physicsBody)
}


// *** GameScene
class GameScene: SKScene {
var tank1 = Tank(playerNum: 1, filename: "Spaceship", tankName: "Tank1")
let myLabel = SKLabelNode(fontNamed:"Chalkduster")

override func didMoveToView(view: SKView) {

    self.addChild(tank1.sprite)

    for i in 0 ..< tank1.TOTAL_BULLETS {
        self.addChild(tank1.bullets[i].sprite)
    }

为简单起见，我对Tank和Bullet（只是不同的大小）使用相同的图像来创建SKSpriteNode。

我不确定这是否会有所帮助，但我在游戏中添加了坦克及其所有10颗子弹的实例。

Answer 1

您的问题是，您没有向SKTexture添加SKSpriteNode图片。如果您想访问SKTexture，则需要将其添加到节点中：

var spaceshipTexture = SKTexture(imageNamed: "Spaceship")

var sprite = SKSpriteNode(texture: spaceshipTexture, size: spaceshipTexture.size())

然后，您将能够访问精灵的纹理以创建SKPhysicsBody

无法将PhysicsBody添加到SKSpriteNode（游戏崩溃）

1 个答案: