如何应用SPRITEKIT的CAMERA实现游戏中的ENDLESS无限循环背景详解手机开发

A Tutorial For How To Use SpriteKit Camera Making Endless Background

Player运用Camera节点向前移动的效果

向前舞动

命为SpriteNode为player

player的Custom Class 为自定义Node

拖动Camera 进场景中

命名为mainCamera,相机Camera的Position(0,0) ,Zposition为1

设置Scene的Camera为mainCamera

camera的节点移动到2048(self.size.width)的时候，把红色框内的节点移动到最右边( node.position.x += self.size.width * SCENE_NUMBERS)

 
 /// 查找所有命名为ground的精灵节点 
        enumerateChildNodes(withName: "//ground") { (node, _ ) in 
            /// 如果当前的节点 + scene.size.with <  则移动节点 
            if node.position.x + self.size.width < camera.position.x { 
                node.position.x += self.size.width * SCENE_NUMBERS /// 更新节点的位置 
            } 
        } 

完整的代码如下：

 
// 
//  GameScene.swift 
//  CameraEndless 
// 
//  Created by www.iFIERO.com. 
//  Copyright © 2018 iFiero. All rights reserved. 
// 
 
import SpriteKit 
import GameplayKit 
 
public let CAMERA_MOVE_XPOS:CGFloat   = 12  /// 相机X-Axis移动的尺寸; 
public let SCENE_NUMBERS:CGFloat = 2.0      /// 有几个场景scene 
 
class GameScene: SKScene { 
     
    private var player = PlayerClass()  /// 初始化自定义节点 
    private var mainCamera:SKCameraNode! 
    private var ground:SKSpriteNode! /// 地板 
    private var bg:SKSpriteNode!    /// 背景 
    private var cloud:SKSpriteNode! /// 云 cloud 
     
    override func didMove(to view: SKView) { 
         
        initUI()     /// 初始化Scene里的各个精灵节点 
        initCamera() /// 初始化相机节点; 
    } 
     
    func initUI(){ 
        /// player名称为GameScene.sks 上自行命名的名称 
        player = childNode(withName: "player") as! PlayerClass 
        player.initPlayer() /// 开始Wobbing 
        ground = childNode(withName: "ground") as! SKSpriteNode 
        bg     = childNode(withName: "bg") as! SKSpriteNode 
        cloud  = childNode(withName: "cloud") as! SKSpriteNode 
    } 
     
    func initCamera(){ 
        mainCamera = childNode(withName: "mainCamera") as! SKCameraNode 
    } 
     
    /// 移动节点 
    func moveSprites(camera:SKCameraNode){ 
        /// 查找所有命名为ground的精灵节点 
        enumerateChildNodes(withName: "//ground") { (node, _ ) in 
            /// 如果当前的节点 + scene.size.with <  则移动节点 
            if node.position.x + self.size.width < camera.position.x { 
                node.position.x += self.size.width * SCENE_NUMBERS /// 更新节点的位置 
            } 
        } 
        /// 查找bg 
        enumerateChildNodes(withName: "//bg") { (node, _) in 
            if node.position.x + self.size.width < camera.position.x { 
                node.position.x += self.size.width * SCENE_NUMBERS 
            } 
        } 
        ///查找所有云 
        enumerateChildNodes(withName: "cloud") { (node, _) in 
            if node.position.x + self.size.width < camera.position.x { 
                node.position.x += self.size.width * SCENE_NUMBERS  
            } 
        } 
    } 
     
    override func update(_ currentTime: TimeInterval) { 
        mainCamera.position.x += CAMERA_MOVE_XPOS /// 向前移动; 
        player.position.x += CAMERA_MOVE_XPOS     /// player向右移动的速度和camera的速度一致 
        moveSprites(camera: mainCamera)           /// 传入相机节点 
    } 
} 
 

更多教程：http://www.ifiero.com/

源代码传送门：http://www.ifiero.com/uploads/CameraEndlessWithSpriteKitTutorial.zip

GitHub传送门：https://github.com/apiapia/CameraEndlessWithSpriteKitTutorial