Swift游戏实战-跑酷熊猫 13 二段跳的实现

原文: Swift游戏实战-跑酷熊猫 13 二段跳的实现

 

这节内容我们来实现熊猫的二段跳。

 

要点：

二段跳的逻辑：

逻辑一，第一次点击屏幕，status就会变成jump。

逻辑二，第二次点击屏幕，status就会变成jump2。

逻辑三，当status变成jump2的时候不响应屏幕点击

逻辑四，当熊猫落地时将status变为run。

 

所以只要当status的不等于jump2的时候，点击屏幕都会给熊猫施加一个向上的速度。这时候判断。如果是一段跳就将status设为jump。如果是二段跳就将status设为jump2。落地改变状态之前已经写好了。

二段跳的实现：

       

 func jump (){

        self.removeAllActions()

        if status != Status.jump2 {

            self.runAction(SKAction.animateWithTextures(jumpFrames, timePerFrame: 0.05),withKey:"jump")

            self.physicsBody.velocity = CGVectorMake(0, 450)

            if status == Status.jump {

                status = Status.jump2

            }else{

                status = Status.jump

            }

        }

    }

 

 

整体代码：

import SpriteKit

 

enum 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.run

 

    init(){

        let texture = runAtlas.textureNamed("panda_run_01")

        let size = texture.size()

        super.init(texture:texture,color:SKColor.whiteColor(),size:size)

       

        var i:Int

        for 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 = true

        self.physicsBody.allowsRotation = false

        //摩擦力

        self.physicsBody.restitution = 0

        self.physicsBody.categoryBitMask = BitMaskType.panda

        self.physicsBody.contactTestBitMask = BitMaskType.scene | BitMaskType.platform

        self.physicsBody.collisionBitMask = BitMaskType.platform

        run()

    }

    func run(){

        self.removeAllActions()

        self.status = .run

        self.runAction(SKAction.repeatActionForever(SKAction.animateWithTextures(runFrames, timePerFrame: 0.05)))

    }

   

    func jump (){

        self.removeAllActions()

        if status != Status.jump2 {

            self.runAction(SKAction.animateWithTextures(jumpFrames, timePerFrame: 0.05),withKey:"jump")

            self.physicsBody.velocity = CGVectorMake(0, 450)

            if status == Status.jump {

                status = Status.jump2

            }else{

                status = Status.jump

            }

        }

    }

   

    func roll(){

        self.removeAllActions()

        status = .roll

        self.runAction(SKAction.animateWithTextures(rollFrames, timePerFrame: 0.05),completion:{() in self.run()})

    }

  

}

 

项目文件地址

http://yun.baidu.com/share/link?shareid=3824235955&uk=541995622

 

Swift游戏实战-跑酷熊猫系列

00 游戏预览

01 创建工程导入素材

02 创建熊猫类

03 熊猫跑动动画

04 熊猫的跳和滚的动作

05 踩踏平台是怎么炼成的

06 创建平台类以及平台工厂类

07 平台的移动

08 产生源源不断的移动平台

09 移除场景之外的平台

10 视差滚动背景

11 欢迎进入物理世界

12 与平台的碰撞