这一节 我将实现让小怪物跟随我的触摸方向移动，同时触摸的地方产生一个四周发散的效果

效果如下：

代码下载：http://www.kuaipan.cn/file/id_25348935635744782.htm?source=1

打开MainLayer.js,把onDidLoadFromCCB函数修改如下，让触摸可用；

MainLayer.prototype.onDidLoadFromCCB = function () { if (sys.platform == 'browser') { this.onEnter(); } else { this.rootNode.onEnter = function () { this.controller.onEnter(); }; } this.rootNode.schedule(function (dt) { this.controller.onUpdate(dt); }); this.rootNode.onExit = function () { this.controller.onExit(); }; this.rootNode.onTouchesBegan = function (touches, event) { this.controller.onTouchesBegan(touches, event); return true; }; this.rootNode.onTouchesMoved = function (touches, event) { this.controller.onTouchesMoved(touches, event); return true; }; this.rootNode.onTouchesEnded = function (touches, event) { this.controller.onTouchesEnded(touches, event); return true; }; this.rootNode.setTouchEnabled(true); };
在文件底部加入 触摸开始，触摸移动，触摸结束函数；

MainLayer.prototype.onTouchesBegan = function (touches, event) { var loc = touches[0].getLocation(); } MainLayer.prototype.onTouchesMoved = function (touches, event) { cc.log("onTouchesMoved"); } MainLayer.prototype.onTouchesEnded = function (touches, event) { cc.log("onTouchesEnded"); }

MainLayer.prototype.monsterMove = function (x, y) { this.monster.stopAllActions(); cc.AnimationCache.getInstance().addAnimations("Resources/snow_frame.plist");//添加帧动画文件 var action0 = cc.Sequence.create(cc.MoveTo.create(5, cc.p(x, y))); //向前移动 var actionFrame = cc.Animate.create(cc.AnimationCache.getInstance().getAnimation("monster")); //获取帧动画 var action1 = cc.Repeat.create(actionFrame, 90000); var action2 = cc.Spawn.create(action0, action1); //同步动画 this.monster.runAction(action2); }
触摸结束时，加入monsterMove函数，这时触摸一个点，小怪物会立刻移动到该位置；

MainLayer.prototype.onTouchesEnded = function (touches, event) { cc.log("onTouchesEnded"); var loc = touches[0].getLocation(); this.monsterMove(loc.x, loc.y); }
按照之前博客教过的在particles目录下创建一个发散粒子，现在在触摸的地方加入发散效果，效果周期为3秒，3秒后消失；

再次打开MainLayer.js,加入创建粒子的函数

MainLayer.prototype.createParticle = function (name, x, y) { var particle = cc.ParticleSystem.create("Resources/particles/" + name + ".plist"); particle.setAnchorPoint(cc.p(0.5, 0.5)); particle.setPosition(cc.p(x, y)); particle.setPositionType(1); particle.setDuration(3); this.rootNode.addChild(particle); }
同时在触摸结束时加入粒子函数；

MainLayer.prototype.onTouchesEnded = function (touches, event) { cc.log("onTouchesEnded"); var loc = touches[0].getLocation(); this.monsterMove(loc.x, loc.y); this.createParticle("around", loc.x, loc.y); }
点击运行；一切OK；

下一篇文章 我会介绍cocos2d-x editor的音乐和音效 笔者（李元友）

资料来源：cocos2d-x editor