弹框时出现灰色背景

    <view wx:if="{{isChose == 1}}" class="fullbg {{isfull ? 'fullopacity' : ''}}" bindtap="hidebg"></view>

.fullbg {

    position: fixed;

    z-index: 1;

    top: 0;

    width: 100%;

    height: 100%;

    background: rgb(1, 1, 1);

    transition: all 2s;

    opacity: 0;

}

.fullopacity {

    opacity: .5;

}

    hidebg:function () {

        this.setData({

            isChose:'0',

            isfull:false,

            rightOpen:false

        })  

    }