7.3.9 picker-view

picker-view 嵌入页面的滚动选择器，可以自定义显示内容和样式。

picker-view 所包含的属性，如表7-21所示：

表7-21

示例代码： wxml中：

<view>
  <view>{{year}}年{{month}}月{{day}}日</view>
  <picker-view indicator-style="height: 50px;" style="width: 100%; height: 300px;" value="{{value}}" bindchange="bindChange">
    <picker-view-column>
      <view wx:for="{{years}}" style="line-height: 50px">{{item}}年</view>
    </picker-view-column>
    <picker-view-column>
      <view wx:for="{{months}}" style="line-height: 50px">{{item}}月</view>
    </picker-view-column>
    <picker-view-column>
      <view wx:for="{{days}}" style="line-height: 50px">{{item}}日</view>
    </picker-view-column>
  </picker-view>
</view>

js中：

const date = new Date()
const years = []
const months = []
const days = []

for (let i = 1990; i <= date.getFullYear(); i++) {
  years.push(i)
}

for (let i = 1 ; i <= 12; i++) {
  months.push(i)
}

for (let i = 1 ; i <= 31; i++) {
  days.push(i)
}

Page({
  data: {
    years: years,
    year: date.getFullYear(),
    months: months,
    month: 2,
    days: days,
    day: 2,
    year: date.getFullYear(),
    value: [9999, 1, 1],
  },
  bindChange: function(e) {
    const val = e.detail.value
    this.setData({
      year: this.data.years[val[0]],
      month: this.data.months[val[1]],
      day: this.data.days[val[2]]
    })
  }
})

注意：

• picker-view 中只可放置<picker-view-column/>组件，放置其他标签不会显示。picker-view-column 其孩子节点的高度会自动设置成与picker-view的选中框的高度一致。