微信小程序picker选择器获取值的2种方法示例

//wxml页面 
<picker bindchange="PickerChange" value="{{index}}" range="{{picker}}">
			<!-- <view class="text3">{{picker?picker[index]:''}}</view> -->
      <view class="txt">{{city}}</view>
      <image class="image-jiantou1"
           src="././image/箭头.png"></image>
		</picker>

//js页面
  data: {
  picker:['杭州','上海','北京'],
  index:null,
  city:'杭州'
  },
  PickerChange(e){
    console.log(e)
    this.setData({
      index:e.detail.value
    })
    if(this.data.index==0){
      this.setData({
        city:'杭州'
      })
    }
    else  if(this.data.index==1){
      this.setData({
        city:'上海'
      })
    }else{
      this.setData({
        city:'北京'
      })
    }
  },

  PickerChange(e){
    this.setData({
      city:this.data.picker[e.detail.value]
    })
  },