vue和ainapp动态获取数据改变背景颜色

<view class="userInfo" :style="'background-image: '+'url( ' + userImg+' ) '">
                <image class="logo-img" src="/static/img/my/defaultAvatarUrl.png"></image>
            <view class="logo-title">
                <text class="uer-name" v-if="hasLogin">{{userInfo.nickname}}</text>
                <text class="uer-name" v-else>都市夜归人</text>
            </view>
        </view>

<script>
    export default {
        data() {
            return {
                userImg: '/static/img/my/headers.png',
                hasLogin: false,
                userInfo: {
                    nickname: '都市夜归人',
                    username: 'admin',
                    mobile: '15201086747'
                },
                gridList: [
                    {
                        icon: 'notification-filled',
                        text: '测试'
                    },
                    {
                        icon: 'notification-filled',
                        text: '测试'
                    },
                    {
                        icon: 'notification-filled',
                        text: '测试'
                    },
                    {
                        icon: 'notification-filled',
                        text: '测试'
                    }
                ],
                sublist: [
                    {
                        title: '问题反馈',
                        icon: 'fire-filled',
                        to: 'www.baiud.com',
                        rightText: '1111',
                        showBadge: true
                    },
                    {
                        title: '设置',
                        icon: 'fire-filled',
                        to: 'www.baiud.com',
                        rightText: '1111',
                        showBadge: true
                    },
                    {
                        title: '关于',
                        icon: 'fire-filled',
                        to: 'www.baiud.com',
                        rightText: '1111',
                        showBadge: true
                    }
                ]
            }
        },
        methods: {
           
        }
    }
</script>