ios - Sprite Kit 所有对象仅出现在屏幕的右半部分
<p><p>您好，我不是一个经验丰富的 ios 应用程序开发人员，我正在使用表情符号创建这个太空游戏，但是所有内容都在屏幕中间生成，当我使用加速度计移动玩家时，如果它正确的话消失，但如果我向左倾斜它会消失并从右循环返回，我该如何解决这个问题并为我的游戏 View 添加边框？？</p>
<p>这是我的模拟器的截图
<a href="/image/SU7Gl.png" rel="noreferrer noopener nofollow"><img src="/image/SU7Gl.png" alt="In this screenshot, it shows how the emojis only spawn on the right half of the screen, and the player can't get to the left half either"/></a> </p>
<pre><code>import SpriteKit
import GameplayKit
import CoreMotion
class GameScene: SKScene, SKPhysicsContactDelegate {
var player:SKSpriteNode!
var emojis = ["emoji1","emoji2", "emoji3", "emoji4", "emoji5"]
var stars:SKEmitterNode!
var scoreLabal: SKLabelNode!
var score: Int = 0 {
didSet {
scoreLabal.text = "Score: \(score)"
}
}
var gameTimer: Timer!
let emojiCatagory: UInt32 = 0x1 << 1
let photonTorpedoCatagory: UInt32 = 0x1 << 0
let motionManger = CMMotionManager()
var xAcceleration:CGFloat = 0
override func sceneDidLoad() {
stars = SKEmitterNode(fileNamed: "Starfield")
stars.position = CGPoint(x: 0, y: 1472)
stars.advanceSimulationTime(10)
self.addChild(stars)
player = SKSpriteNode(imageNamed: "Gun")
player.position = CGPoint(x: self.frame.size.width / 32, y: (0 - (self.frame.size.height - player.size.height ) ) / 2 )
print("The current deviec's screen height is \(self.frame.height), and the current device's width is \(self.frame.size.width) and the player's position is \(player.position)")
self.addChild(player)
self.physicsWorld.gravity = CGVector(dx: 0, dy: 0)
self.physicsWorld.contactDelegate = self
scoreLabal = SKLabelNode(text: "Score: 0")
scoreLabal.position = CGPoint(x:(self.frame.size.width - scoreLabal.frame.size.width ) / 2 - 20 , y: (self.frame.size.height - scoreLabal.frame.size.height ) / 2- 20 )
scoreLabal.fontName = "Symbol"
scoreLabal.fontColor = .white
scoreLabal.fontSize = 36
score = 0
self.addChild(scoreLabal)
gameTimer = Timer.scheduledTimer(timeInterval: 0.75, target: self, selector: #selector(setEmoji), userInfo: nil, repeats: true)
motionManger.accelerometerUpdateInterval = 0.2
motionManger.startAccelerometerUpdates(to: OperationQueue.current!) { (data:CMAccelerometerData?, error:Error?) in
if let accelerometerData = data {
let acceleration = accelerometerData.acceleration
self.xAcceleration = CGFloat(acceleration.x) * 0.75 + self.xAcceleration * 0.25
}
}
}
@objc func setEmoji() {
emojis = GKRandomSource.sharedRandom().arrayByShufflingObjects(in: emojis) as!
let emoji = SKSpriteNode(imageNamed: emojis)
let randomPosition = GKRandomDistribution(lowestValue: 0, highestValue: Int(self.view!.bounds.width))
print("this is the self . view", self.view!.bounds.width)
print("this is the self the frame", self.frame.size.width)
let position = CGFloat(randomPosition.nextInt())
emoji.position = CGPoint(x: position, y: self.view!.bounds.height + emoji.size.height)
emoji.physicsBody = SKPhysicsBody(rectangleOf: emoji.size)
emoji.physicsBody?.isDynamic = true
emoji.physicsBody?.categoryBitMask = emojiCatagory
emoji.physicsBody?.contactTestBitMask = photonTorpedoCatagory
emoji.physicsBody?.collisionBitMask = 0
self.addChild(emoji)
let animationduration = 5
var acctionArray = ()
acctionArray.append(SKAction.move(to: CGPoint(x: position, y: (0 - (self.frame.size.height) ) / 2 ), duration: TimeInterval(animationduration)))
acctionArray.append(SKAction.removeFromParent())
emoji.run(SKAction.sequence(acctionArray))
}
func fireTorpedo(soundFileName: String, positionOf: CGPoint) {
self.run(SKAction.playSoundFileNamed(soundFileName, waitForCompletion: false))
let torpedoNode = SKSpriteNode(imageNamed: "torpedo")
torpedoNode.position = player.position
torpedoNode.position.y += 5
torpedoNode.physicsBody = SKPhysicsBody(circleOfRadius: torpedoNode.size.width / 2)
torpedoNode.physicsBody?.categoryBitMask = photonTorpedoCatagory
torpedoNode.physicsBody?.contactTestBitMask = emojiCatagory
torpedoNode.physicsBody?.collisionBitMask = 0
self.addChild(torpedoNode)
let animationDuration = 0.3
var acctionArray = ()
acctionArray.append(SKAction.move(to: CGPoint(x: positionOf.x , y: self.frame.size.height + 10 ), duration: TimeInterval(animationDuration)))
print("positionOf.x value = \(positionOf.x)")
print("positionOf value = \(positionOf)")
print("positionOf.y value = \(positionOf.y)")
acctionArray.append(SKAction.removeFromParent())
torpedoNode.run(SKAction.sequence(acctionArray))
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
if let touch = touches.first {
let PositionOfTouch = touch.location(in: view)
}
let PositionOfTouches = touches.first?.location(in: view)
fireTorpedo(soundFileName: "torpedo1", positionOf: PositionOfTouches!)
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
if let touch = touches.first {
let PositionOfTouch = touch.location(in: view)
}
if score > 100 && score < 200 {
let PositionOfTouches = touches.first?.location(in: view)
fireTorpedo(soundFileName: "torpedo2", positionOf: PositionOfTouches!)
}
}
func torpedoCollideWithEmoji (torpedoNode: SKSpriteNode, emojiNode: SKSpriteNode) {
let explosion = SKEmitterNode(fileNamed: "Explosion")!
explosion.position = emojiNode.position
self.addChild(explosion)
torpedoNode.removeFromParent()
emojiNode.removeFromParent()
self.run(SKAction.wait(forDuration: 2)) {
explosion.removeFromParent()
}
score += 5
}
override func didSimulatePhysics() {
player.position.x += xAcceleration * 50
if player.position.x < -20 {
player.position = CGPoint(x: self.size.width, y: player.position.y)
} else if player.position.x > self.size.width * 20 {
player.position = CGPoint(x:-20,y: player.position.y )
}
}
func didBegin(_ contact: SKPhysicsContact) {
var firstBody: SKPhysicsBody
var secondBody: SKPhysicsBody
if contact.bodyA.categoryBitMask < contact.bodyB.categoryBitMask{
firstBody = contact.bodyA
secondBody = contact.bodyB
}else {
secondBody = contact.bodyA
firstBody = contact.bodyB
}
if (firstBody.categoryBitMask & photonTorpedoCatagory) != 0 && (secondBody.categoryBitMask & emojiCatagory ) != 0 {
torpedoCollideWithEmoji(torpedoNode: firstBody.node as! SKSpriteNode, emojiNode: secondBody.node as! SKSpriteNode)
}
}
override func update(_ currentTime: TimeInterval) {
}
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>你应该这样做给 View 添加一个边框:</p>
<pre><code>// 1
let borderBody = SKPhysicsBody(edgeLoopFrom: self.frame)
// 2
borderBody.friction = 0
// 3
self.physicsBody = borderBody
</code></pre></p>
<p style="font-size: 20px;">关于ios - Sprite Kit 所有对象仅出现在屏幕的右半部分，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/51340877/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/51340877/
</a>
</p>
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