uniapp 直播每次发消息，滚动条都在底部

{{v.name}}:{{v.content}}

this.chatList.unshift({
name: '我大哥3',
content: this.commentInputValue
});

.bottom-t {
width: 600rpx;
height: 400rpx;
margin-bottom: 30rpx;
margin-top: 12rpx;
border-radius: 10rpx;
transform: rotate(180deg);
}

.bottom-t-t {
margin-bottom: 20rpx;
}

.bottom-t-t-t {
padding: 10rpx;
border-radius: 8rpx;
background-color: rgba(0, 0, 0, 0.4);
margin-top: 10rpx;
}

.bottom-t-t-text {
color: #fff;
font-size: 26rpx;
transform: rotate(180deg);
}