cocoscreator 背包系统 ts

// Learn TypeScript:
//  - https://docs.cocos.com/creator/manual/en/scripting/typescript.html
// Learn Attribute:
//  - https://docs.cocos.com/creator/manual/en/scripting/reference/attributes.html
// Learn life-cycle callbacks:
//  - https://docs.cocos.com/creator/manual/en/scripting/life-cycle-callbacks.html

const {ccclass, property} = cc._decorator;
export let bagItemPrefab:any //背包格子预制体
export let old:cc.Node      //select 子节点
export let bagIcon:{}       //物品图标
export let Item:{} //物品
@ccclass
export default class NewClass extends cc.Component {


    @property(cc.ScrollView)
    scroll:cc.ScrollView=null;


    onClickButton(event, data) {//按钮点击事件  
        if (data == "close") {
            this.node.destroy();
        }
        else if (data == "reset") {
        } else if (data == "use") {
        }
    }

    onClickItem(node) {// 点击物品的选中操作
        if (old) { //this.old 为下面保存的节点
            old.getChildByName("select").active = false
        }
        node.getChildByName("select").active = true;
        old = node;
    }

    refreshItem(List) {//  List  接收的参数
        //如果预制体this.bagItemPrefab 没加载完  或者图标this.bagIcon 没有16张   
        if (!bagItemPrefab || Object.keys(bagIcon).length < 15) {
            setTimeout(   // 则每100毫秒调用一次this.refreshItem(List);
                () => {
                    this.refreshItem(List);
                },
                100,
            )
            return;
        }
        let content = this.scroll.content;// 获取scroll的子节点content
        content.removeAllChildren();//删除content的所有子节点
        for (let i = 0; i < List.length; i++) {
            let node = cc.instantiate(bagItemPrefab);//克隆物品存放的格子
            content.addChild(node);//增加到content的子节点中
            //获取node的子节点更换其中的图标
            node.getChildByName("icon").getComponent(cc.Sprite).spriteFrame = bagIcon[List[i]];
            node.getChildByName("select").active = false;//选中特效一开始为隐藏
            node.on(    //监听点击事件  触发时调用函数this.onClickItem(node);
                cc.Node.EventType.TOUCH_START,
                () => {
                    this.onClickItem(node);
                },
            )
        }
    }

    // LIFE-CYCLE CALLBACKS:

    onLoad() {
        cc.resources.load("prefab/bagItem", cc.Prefab, (err, asset) => {
                if (err) {
                    return;
                }
               bagItemPrefab = asset;//data为加载的预制体
          });
       
       
        bagIcon = {};//创建一个对象   图标以键值对的方式存在对象中
        for (let i = 1; i <= 16; i++) {//加载物品图标
            cc.resources.load( "icon/" + (100 + i),
            cc.SpriteFrame,
            (err, data) => {
                if (err) {
                    return;
                }
                bagIcon[100 + i] = data;
            })
        }
    }

    start() {
        Item=[101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118];
        this.refreshItem(Item);
    }

}