/**
 * 面板動畫陣列
 */
var cow_skin = cc.Class({
    name: "cow_skin",
    properties: {
        cow_anim: {
            type: cc.SpriteFrame,
            default:[],
        },

    }
});

//
cc.Class({
    extends: cc.Component,

    properties: {
        cow_skin_set: {
            default:[],
            type: cow_skin,
        },
    },

    // LIFE-CYCLE CALLBACKS:

    onLoad: function() {

        // game_scene元件
        this.game_scene = cc.find("Canvas").getComponent("game_scene");

        // 主動以程式碼形式為節點新增一個自定義元件
        this.anim_com = this.node.addComponent("frame_anim");

        this.cow_type = Math.floor(Math.random() * 3 + 1); //1-4 但是隻能取到3，做下越界處理
        if(this.cow_type >= 4){
            this.cow_type = 1;
        }

        this.speed_x = -(Math.random() * 100 + 100);
        this._play_cow_walk();

    },

    _play_cow_walk: function(){
        this.anim_com.sprite_frames = this.cow_skin_set[this.cow_type - 1].cow_anim;
        this.anim_com.duration = 0.2;
        this.anim_com.play_loop();
    },

    start () {

    },

    update (dt) {
        var sx = this.speed_x * dt;
        this.node.x += sx;
    },
});
 

1）一次只有一個場景，所以可以從Canvas下面索引當前場景上的元件

this.game_scene = cc.find("Canvas").getComponent("game_scene");

2）可以動態給一個節點通過程式碼的形式給節點增加一個元件，而不用再編輯器中掛載的方式

this.anim_com = this.node.addComponent("frame_anim");