Method callLater

packages/fairygui/src/core/Timer.ts:180–190

* Execute callback at the end of current frame * 在当前帧结束时执行回调 * * @param caller Callback context | 回调上下文 * @param callback Callback function | 回调函数

(caller: any, callback: Function)

     * @param callback Callback function | 回调函数
     */
    public callLater(caller: any, callback: Function): void {
        const list = this._updating ? this._callLaterPending : this._callLaterList;

        const exists = list.some(
            (item) => item.caller === caller && item.callback === callback
        );

        if (!exists) {
            list.push({ caller, callback });
        }
    }

    /**
     * Clear a specific callback