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遍历对象的属性

标准环境下​

for (let key in obj) {
    console.log(key + "---" + obj[key]);
}

小程序环境下渲染​

<view class="flex-between" wx:for="{{mainRecord}}" wx:key="key" wx:for-index="key">
    <view>{{key}}--{{item}}</view>
    <view>删除</view>
</view>