微信小程序自定义picker触发区域

<!-- wxml -->
<picker bindchange="changePicker" value="{{i}}" range="{{list}}">
  <!-- 注意这一层不能少，否则弹性布局失效 -->
  <view class="jcsb">
    <view class="picker-value">{{list[i]}}</view>
    <text class="project-arrow"> > </text>
  </view>
</picker>

/* wxss */
.jcsb {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.picker-value {
  padding-left: 20rpx;
}

.project-arrow {
  font-size: 36rpx;
}

// js
Page({
  data: {
    i: 0,
    list: []
  },
  changePicker(e) {
    this.setData({
      i: e.detail.value
    })
  },
})