Swift碰撞不起作用。我認爲didBeginContact中的代碼有問題

Question

我一直在研究一個遊戲，每當我的測試節點與我的校驗節點聯繫時都必須執行測試。由於這兩個節點是檢查遊戲中碰撞的唯一節點，我決定使用這種方法來啓動我的測試。

問題是我一直有麻煩讓我的碰撞工作時，2節點物理交叉。

當前代碼將移動測試方塊直到它到達校驗方塊，但是現在當它們相遇時沒有任何反應。

我錯過了什麼嗎？任何幫助將不勝感激。謝謝。

import SpriteKit 

class GameScene: SKScene, SKPhysicsContactDelegate { 


var test:SKSpriteNode! 
var testTexture = SKTexture(imageNamed: "redsquare.png") 
var check:SKSpriteNode! 
var checkTexture = SKTexture(imageNamed: "bluesquare.png") 
var moving:SKNode! 
let testCategory: UInt32 = 1 << 0 
let checkCategory: UInt32 = 1 << 2 


override func didMoveToView(view: SKView) { 
    /* Setup your scene here */ 

    self.physicsWorld.gravity = CGVectorMake(0.0, 0.0) 
    self.physicsWorld.contactDelegate = self 

    moving = SKNode() 
    self.addChild(moving) 

    //create test block 

    test = SKSpriteNode(texture: testTexture) 
    test.xScale = 0.1 
    test.yScale = 0.1 
    test.position = CGPointMake(0, self.frame.height - test.size.height) 

    test.physicsBody = SKPhysicsBody(rectangleOfSize: test.size) 
    test.physicsBody?.dynamic = false 

    test.physicsBody?.categoryBitMask = testCategory 
    test.physicsBody?.collisionBitMask = checkCategory 
    test.physicsBody?.contactTestBitMask = checkCategory 

    self.addChild(test) 

    //creates check block 

    check = SKSpriteNode(texture: checkTexture) 
    check.xScale = 0.1 
    check.yScale = 0.1 
    check.position = CGPointMake(self.frame.width, self.frame.height - check.size.height) 

    check.physicsBody = SKPhysicsBody(rectangleOfSize: check.size) 
    check.physicsBody?.dynamic = false 

    check.physicsBody?.categoryBitMask = checkCategory 
    check.physicsBody?.collisionBitMask = testCategory 
    check.physicsBody?.contactTestBitMask = testCategory 

    self.addChild(check) 


    // move action 

    let actionMove = SKAction.moveToX(self.frame.width, duration: 1.5) 
    let actionMoveDone = SKAction.moveToX(0, duration: 0) 

    let moveForever = SKAction.repeatActionForever(SKAction.sequence([actionMove,actionMoveDone])) 
    test.runAction(moveForever) 


} 

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) { 
    /* Called when a touch begins */ 

    for touch: AnyObject in touches { 

    } 
} 

override func update(currentTime: CFTimeInterval) { 
    /* Called before each frame is rendered */ 
} 

func didBeginContact(contact: SKPhysicsContact) { 

// help here! 

    var firstBody:SKPhysicsBody 
    var secondBody:SKPhysicsBody 
    if (contact.bodyA.categoryBitMask < contact.bodyB.categoryBitMask){ 
     firstBody = contact.bodyA 
     secondBody = contact.bodyB 
    } 
    else{ 
     firstBody = contact.bodyB 
     secondBody = contact.bodyA 
    } 
    if((firstBody.categoryBitMask & testCategory) != 0 && (secondBody.categoryBitMask & checkCategory) != 0){ 


     println("contact!") 

    } 


} 

}

Answer 1

根據蘋果的文檔中，dynamic屬性控制基於卷的身體是否受到影響重力，摩擦力，與其他物體，和力或衝動的碰撞直接應用於對象。

動態屬性：默認值爲true。如果該值爲假，那麼物理實體將忽略所有施加於其上的力和衝量。 基於邊緣的物體將忽略此屬性;它們自動靜態。

因此將dynamic屬性設置爲true。

node.physicsBody?.dynamic = true 

欲瞭解更多信息：https://developer.apple.com/library/prerelease/ios/documentation/SpriteKit/Reference/SKPhysicsBody_Ref/index.html#//apple_ref/occ/instp/SKPhysicsBody/