taptapstar/assets/scripts/messageList/MessageList.js

const GameNotificationKey = require('../utils/GameEnum').GameNotificationKey;
// const GameModule = require("../utils/GameModule");


cc.Class({
    extends: cc.Component,

    properties: {
        
        messageItem: cc.Prefab,

        /// 最大同时8条信息流
        maxCount: 8,
    },

    // LIFE-CYCLE CALLBACKS:

    onLoad () {
        this._items = [];
        this._itemsData = [];
        this.updateInitData(-1);
        GameEvent.on(GameNotificationKey.GameUpdateMessageList, this, (updateCount, isTime = false) => {
            // this._updateCount =
            this.updateInitData(updateCount, isTime);
        });
        this.schedule(this.timeAction, 1);
    },

    updateInitData(updateCount, isTime) {
        let timeInformations = Global._timeInformations;
        let itemDatas = timeInformations.concat(Global._fixInformations);
        let originLength = this._itemsData.length;
        let upLength = updateCount == -1 ? itemDatas.length : updateCount;
        let max = upLength + originLength;

        let sub = max - 8;

        /// 如果当前的长度已经大于8了
        if (sub > 0) {
            let timeLength = timeInformations.length;
            for (let i = 0; i < sub; i++) {
                let index = timeLength + i;
                this.hiddenItem(index);
            }
            max -= sub;
            originLength -= sub;
        }
        for (let i = originLength; i < max; ++i) {
            let item = cc.instantiate(this.messageItem);
            let itemData = itemDatas[i];
            item.getComponent('MessageItem').init(itemData);
            this.node.addChild(item);
            this._items.push(item);
        }
        this._itemsData = itemDatas;
        if (isTime === true) {
            this.reloadAllItemData();
        }
    },

    reloadAllItemData() {
        for(let i = 0; i < this._items.length; ++ i) {
            let item = this._items[i];
            let itemData = this._itemsData[i];
            item.getComponent('MessageItem').init(itemData);
        }
    },

    timeAction() {
        let hiddenIndexArr = [];
        for (let i = 0; i < this._items.length; ++ i) {
            let itemNode = this._items[i];
            let itemScript = itemNode.getComponent('MessageItem');
            itemScript.updateTime();
            if (itemScript._messageData.cdTime === 0) {
                hiddenIndexArr.push(i);
            }
        }

        if (hiddenIndexArr.length > 0) {
            for (let i = 0; i < hiddenIndexArr.length; ++ i) {
                this.hiddenItem(hiddenIndexArr[i]);
            }
        }
    },


    hiddenItem(index) {
        if (index < this._items.length) {
            let item = this._items[index];
            let fadeAction = cc.fadeTo(0.5, 0); //0.5秒透明度从255降到0
            let action = cc.sequence(fadeAction, cc.callFunc(() => {
                this._items.splice(index, 1);
                item.destroy();
                item = null;
                this._itemsData.splice(index, 1);
                if (index < Global._timeInformations.length) {
                    Global._timeInformations.splice(index, 1);
                } else {
                    Global._fixInformations.splice(index - Global._timeInformations.length - 1, 1);
                }
            }));
            item.runAction(action);
        }
    },

    start () {
    },


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