微信小程序开发过程中,遇到这么一个状况:须要遍历对象的key-value,而后渲染到视图中。

1,数据如下:

const PUBLIC_COURSE_CHOICE_ITEMS = {    math: {        subject: '数学',        children: [            { id: 1, title: '数一' },             { id: 2, title: '数二' },             { id: 3, title: '数三' },             { id: 0, title: '待定' }        ]    },    english: {        subject: '英语',        children: [            { id: 4, title: '英一' },             { id: 5, title: '英二' },             { id: 0, title: '待定' }        ]    },    politics: {        subject: '政治',        children: [            { id: 6, title: '政治' }        ]    }};

2,设置wx:for的index为key,即指向对象的key,通过key-value的形式进行取值

<view class="public-course-item"     wx:for="{{ publicCourseItems }}"     wx:for-index="key"     wx:key="publicCourseKey">    <view class="public-course-subject">{{ item.subject }}</view>    <view class="public-course-subject-children">        <view class="public-course-child"             wx:for="{{ item.children }}"             wx:key="publicCourseChild"             data-key="{{ courseIndex }}"            data-subject="{{ key }}"             data-id="{{ item.id }}"            catchtap="onChoicePublicSubjectHandle">            <text class="sue-icon sue-icon-radio{{ courseItem.public_detail[key] == item.id ? '-checked' : '' }}"             style="margin-right: 14rpx;"></text>            {{ item.title }}        </view>    </view></view>

3,渲染成果