//设置物理体以及中心点
self.physicsBody = SKPhysicsBody(rectangleOfSize: CGSizeMake(self.width, self.height), center: CGPointMake(self.width/2, 0))
//设置碰撞标示符
self.physicsBody.categoryBitMask = BitMaskType.platform
//不受碰撞影响
self.physicsBody.dynamic = false
//不允许角度变化
self.physicsBody.allowsRotation = false
//摩擦力
self.physicsBody.restitution = 0

//用或“|”分割需要进行检测的标示符
self.physicsBody.contactTestBitMask = BitMaskType.scene | BitMaskType.platform
//用physicsBody.collisionBitMask来设置产生碰撞效果的物体
self.physicsBody.collisionBitMask = BitMaskType.platform

import SpriteKitclass Platform:SKNode{var width = 0.0var height = 10.0func onCreate(arrSprite:[SKSpriteNode]){for platform in arrSprite{platform.position.x=self.widthself.addChild(platform)self.width += platform.size.width}self.physicsBody = SKPhysicsBody(rectangleOfSize: CGSizeMake(self.width, self.height), center: CGPointMake(self.width/2, 0))self.physicsBody.categoryBitMask = BitMaskType.platformself.physicsBody.dynamic = falseself.physicsBody.allowsRotation = false//摩擦力self.physicsBody.restitution = 0}}

import SpriteKitenum Status:Int{case run=1,jump,jump2,roll;
}class Panda : SKSpriteNode {let runAtlas = SKTextureAtlas(named: "run.atlas")let runFrames = [SKTexture]()let jumpAtlas = SKTextureAtlas(named: "jump.atlas")let jumpFrames = [SKTexture]();let rollAtlas = SKTextureAtlas(named: "roll.atlas")let rollFrames = [SKTexture]();var status = Status.runinit(){let texture = runAtlas.textureNamed("panda_run_01")let size = texture.size()super.init(texture:texture,color:SKColor.whiteColor(),size:size)var i:Intfor i=1 ; i<=runAtlas.textureNames.count ; i++ {let tempName = String(format: "panda_run_%.2d", i)let runTexture = runAtlas.textureNamed(tempName)if runTexture {runFrames.append(runTexture)}}for i=1 ; i<=jumpAtlas.textureNames.count ; i++ {let tempName = String(format: "panda_jump_%.2d", i)let jumpTexture = jumpAtlas.textureNamed(tempName)if jumpTexture {jumpFrames.append(jumpTexture)}}for i=1 ; i<=rollAtlas.textureNames.count ; i++ {let tempName = String(format: "panda_roll_%.2d", i)let rollTexture = rollAtlas.textureNamed(tempName)if rollTexture {rollFrames.append(rollTexture)}}self.physicsBody = SKPhysicsBody(rectangleOfSize: texture.size())self.physicsBody.dynamic = trueself.physicsBody.allowsRotation = false//摩擦力self.physicsBody.restitution = 0self.physicsBody.categoryBitMask = BitMaskType.pandaself.physicsBody.contactTestBitMask = BitMaskType.scene | BitMaskType.platformself.physicsBody.collisionBitMask = BitMaskType.platformrun()}func run(){self.removeAllActions()self.status = .runself.runAction(SKAction.repeatActionForever(SKAction.animateWithTextures(runFrames, timePerFrame: 0.05)))}func jump (){self.removeAllActions()status = .jumpself.runAction(SKAction.animateWithTextures(jumpFrames, timePerFrame: 0.05))}func roll(){self.removeAllActions()status = .rollself.runAction(SKAction.animateWithTextures(rollFrames, timePerFrame: 0.05),completion:{() in self.run()})}}