防止vue组件渲染不更新

1、key

<el-dialog
            title=""
            :visible.sync="dialogVisible"
            @close="dialogClose">
            <iframe :src="detailsHref" frameborder="0" width="100%" height="600px" :key="detailsHref"></iframe>
        </el-dialog>

2、v-if

<el-dialog
            title=""
            :visible.sync="dialogVisible"
            @close="dialogClose">
            <!-- <iframe src="http://das04.bda.shcp.360es.cn/zdfk/#/zdfk/ycfx/detail/33e4f73e-fe0a-488a-a49c-6ee50cc3da24" frameborder="0" width="100%" height="600px"></iframe> -->
            <iframe :src="detailsHref" frameborder="0" width="100%" height="600px" v-if='showIframe'></iframe>
        </el-dialog>