我已经搜索了所有代码，但仍然无法弄清为什么我收到了我得到的错误。我也看过其他线程，在spritekit上找不到任何更新，因此我继续提出自己的问题。 XCode告诉我这是线程1:在我的AppDelegate的“类AppDelegate:UIResponder，UIApplicationDelegate”上发出信号Sigabrt的错误:
2017-08-29 23:26:57.775 Flappy Land[10451:1252264] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Attemped to add a SKNode which already has a parent: <SKSpriteNode> name:'(null)' texture:[<SKTexture> 'Wall' (100 x 1000)] position:{20, -600} scale:{1.00, 1.00} size:{100, 1000} anchor:{0.5, 0.5} rotation:0.00'
*** First throw call stack:
(
0 CoreFoundation 0x000000010d2fcb0b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x0000000109c3e141 objc_exception_throw + 48
2 CoreFoundation 0x000000010d365625 +[NSException raise:format:] + 197
3 SpriteKit 0x000000010a904c95 -[SKNode insertChild:atIndex:] + 162
4 SpriteKit 0x000000010a904bd2 -[SKNode addChild:] + 68
5 Flappy Land 0x000000010965bf02 _TFC11Flappy_Land9GameScene11createWallsfT_T_ + 2018
6 Flappy Land 0x000000010965ccd3 _TFFC11Flappy_Land9GameScene12touchesBeganFTGVs3SetCSo7UITouch_4withGSqCSo7UIEvent__T_U_FT_T_ + 35
7 Flappy Land 0x000000010965cdb7 _TTRXFo___XFdCb___ + 39
8 SpriteKit 0x000000010a8f2f1f -[SKRunBlock updateWithTarget:forTime:] + 99
9 SpriteKit 0x000000010a8c4ae5 _ZN11SKCSequence27cpp_updateWithTargetForTimeEP7SKCNoded + 99
10 SpriteKit 0x000000010a8b280b _ZN9SKCRepeat27cpp_updateWithTargetForTimeEP7SKCNoded + 45
11 SpriteKit 0x000000010a8baace _ZN7SKCNode6updateEdf + 250
12 SpriteKit 0x000000010a8d0d95 -[SKScene _update:] + 628
13 SpriteKit 0x000000010a8eeb8f -[SKView _update:] + 984
14 SpriteKit 0x000000010a8eb5ed __51-[SKView _vsyncRenderForTime:preRender:postRender:]_block_invoke.322 + 285
15 SpriteKit 0x000000010a8eaa16 -[SKView _vsyncRenderForTime:preRender:postRender:] + 580
16 SpriteKit 0x000000010a8ec1f9 __29-[SKView setUpRenderCallback]_block_invoke + 211
17 SpriteKit 0x000000010a922ae4 -[SKDisplayLink _callbackForNextFrame:] + 335
18 QuartzCore 0x0000000111128767 _ZN2CA7Display15DisplayLinkItem8dispatchEy + 51
19 QuartzCore 0x000000011112862d _ZN2CA7Display11DisplayLink14dispatch_itemsEyyy + 439
20 CoreFoundation 0x000000010d28fb61 __CFMachPortPerform + 161
21 CoreFoundation 0x000000010d28faa9 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 41
22 CoreFoundation 0x000000010d28fa21 __CFRunLoopDoSource1 + 465
23 CoreFoundation 0x000000010d287ba0 __CFRunLoopRun + 2352
24 CoreFoundation 0x000000010d287016 CFRunLoopRunSpecific + 406
25 GraphicsServices 0x0000000111759a24 GSEventRunModal + 62
26 UIKit 0x000000010aaee0d4 UIApplicationMain + 159
27 Flappy Land 0x000000010965f0d7 main + 55
28 libdyld.dylib 0x000000010e29c65d start + 1
29 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
我的代码:
import SpriteKit
import GameplayKit
struct PhysicsCategory {
static let Ghost : UInt32 = 0x1 << 1
static let Ground : UInt32 = 0x1 << 2
static let Wall : UInt32 = 0x1 << 3
}
class GameScene: SKScene {
//Variables - Global
var Ground = SKSpriteNode()
var Ghost = SKSpriteNode()
var Wall = SKSpriteNode()
let btmWall = SKSpriteNode(imageNamed: "Wall")
var gameStarted = Bool()
var moveAndRemove = SKAction()
override func didMove(to view: SKView) {
//Ground Stuff
Ground = SKSpriteNode(imageNamed: "Ground")
Ground.setScale(1)
Ground.position = CGPoint(x: 0 , y: -640)
Ground.physicsBody = SKPhysicsBody(rectangleOf : Ground.size)
Ground.physicsBody?.categoryBitMask = PhysicsCategory.Ground
Ground.physicsBody?.collisionBitMask = PhysicsCategory.Ghost
Ground.physicsBody?.contactTestBitMask = PhysicsCategory.Ghost
Ground.physicsBody?.affectedByGravity = false
Ground.physicsBody?.isDynamic = false
self.addChild(Ground)
//Ghost Stuff
Ghost = SKSpriteNode(imageNamed: "Ghost")
Ghost.size = CGSize(width: 60, height: 70)
Ghost.position = CGPoint(x: -200, y: 0.0)
Ghost.setScale(2.0)
Ghost.physicsBody = SKPhysicsBody(circleOfRadius: Ghost.frame.height / 2)
Ghost.physicsBody?.categoryBitMask = PhysicsCategory.Ghost
Ghost.physicsBody?.collisionBitMask = PhysicsCategory.Ground | PhysicsCategory.Wall
Ghost.physicsBody?.contactTestBitMask = PhysicsCategory.Ground | PhysicsCategory.Wall
Ghost.physicsBody?.affectedByGravity = true
Ghost.physicsBody?.isDynamic = true
self.addChild(Ghost)
createWalls()
}
func createWalls() {
btmWall.setScale(1)
btmWall.position = CGPoint(x: 20, y: -600)
btmWall.physicsBody = SKPhysicsBody(rectangleOf: btmWall.size)
btmWall.physicsBody?.categoryBitMask = PhysicsCategory.Wall
btmWall.physicsBody?.collisionBitMask = PhysicsCategory.Ghost
btmWall.physicsBody?.contactTestBitMask = PhysicsCategory.Wall
btmWall.physicsBody?.isDynamic = false
btmWall.physicsBody?.affectedByGravity = false
btmWall.run(moveAndRemove)
addChild(btmWall)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
if gameStarted == false {
gameStarted = true
let spawn = SKAction.run({
() in
self.createWalls()
})
let delay = SKAction.wait(forDuration: 2.0)
let spawnDelay = SKAction.sequence([spawn , delay])
let spawnDelayForever = SKAction.repeatForever(spawnDelay)
self.run(spawnDelayForever)
let distance = CGFloat(self.frame.width + btmWall.frame.width)
let movePipes = SKAction.moveBy(x: -distance, y: 0, duration: TimeInterval(0.01 * distance))
let removePipes = SKAction.removeFromParent()
moveAndRemove = SKAction.sequence([movePipes , removePipes])
Ghost.physicsBody?.velocity = CGVector(dx: 0, dy: 0)
Ghost.physicsBody?.applyImpulse(CGVector(dx: 0, dy: 500))
} else {
Ghost.physicsBody?.velocity = CGVector(dx: 0, dy: 0)
Ghost.physicsBody?.applyImpulse(CGVector(dx: 0, dy: 500))
}
}
}
非常感谢您的任何帮助。谢谢!
最佳答案
问题:您在createWalls()中调用didMove(to:)。您还可以在createWalls()中调用touchesBegan(:with:)。首次调用createWalls()时，它将添加一个节点到场景中。第二次调用createWalls()时，它将尝试再次将同一节点添加到场景中。您将收到一个异常消息，告诉您您正在尝试添加已经添加到场景中的节点。
解决方案:不要那样做。 createWalls()显然是一种设置方法，只需要调用一次，因此请确保仅调用一次。