如何默认到浙江省，设置value没效果，一直都是第一个

<picker-view style=“width: 100%; height:400px;” value="{{value}}" wx:key="">

<picker-view-column>

<view wx:for="{{provinces}}" class=“picker-item”>

{{item.name}}</view>

</picker-view-column>

<picker-view-column>

<view wx:for="{{citys}}" class=“picker-item” wx:key="">

{{item.name}}</view>

</picker-view-column>

</picker-view>

</view>

var id = address.provinces[10].id

this.setData({

value: [10, 0],

provinces: address.provinces,

citys: address.citys[id]

})