[]list中加的button不能接收点击事件 求一个list中加button的demo

updateItem(items):void{
        var posY = 0;
        var data: Array<any> = [];
        for(var i= 0 ;i< items.UserWareList.length;i++){
            var itemList = new BagItem(items.icon,items.name,items.count);
            itemList.pos(70,posY);
            data.push(itemList);
            posY = posY + 200;
        }
        let list = new Laya.List;
        list.width = this.itemList.width;
        list.height = this.itemList.height;
        list.x = this.itemList.x;
        list.y = this.itemList.y;
        list.spaceY = 12;
        list.vScrollBarSkin = "";
        list.selectEnable = true;
        list.itemRender = BagItem;
        list.renderHandler = new Handler(this, this.updateListItem);
        list.selectHandler = new Handler(this, this.onSelect);
       
        this.addChild(list);
        list.array = data;  
    }
    updateListItem(cell: BagItem, index: number):void{
        console.log("3333333333333");
        if (cell.useBtn.clickHandler == undefined) {
            cell.useBtn.on("click", this, this.onItemUse, [index]);
        }
    }
    onItemUse(index):void{
        console.log("11111111111111111");
    }
    onSelect():void{
        console.log("22222222222222222");
    }
这是我写的BagItem​里面有个按钮但是 按钮不能被点击 应该是被吞噬了吧

能提供一个重现问题的错误示例吗？我们查下问题