zj-Exercise/CocosCreator/Demo5_RunningCow/assets/script/run.js

// Learn cc.Class:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/class.html
//  - [English] http://docs.cocos2d-x.org/creator/manual/en/scripting/class.html
// Learn Attribute:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/reference/attributes.html
//  - [English] http://docs.cocos2d-x.org/creator/manual/en/scripting/reference/attributes.html
// Learn life-cycle callbacks:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/life-cycle-callbacks.html
//  - [English] https://www.cocos2d-x.org/docs/creator/manual/en/scripting/life-cycle-callbacks.html

cc.Class({
    extends: cc.Component,

    properties: {

    },

    // LIFE-CYCLE CALLBACKS:

    // onLoad () {},

    start () {
        // 创建一个移动动作
        let action = cc.moveBy(5, -1200,0);

        //设置回调
        let finish = cc.callFunc(function (){
            this.node.x = 600;
        },this);

        //顺序动作
        let sequence = cc.sequence(action,finish);

        //让顺序动作一直循环
        let repeatForever = cc.repeatForever(sequence);

        // 执行动作
        this.node.runAction(repeatForever);
    },

    // update (dt) {},
});