wxml：

<view class="section" >  
  <picker bindchange="bindPickerChange" value="{{index}}" range="{{objectArray}}" mode = "selector">  
    <view class="picker">  
      國家：{{objectArray[index]}}  
    </view>  
  </picker>  
</view>  

<view class="section">
 
  
  <picker mode="time" value="{{time}}" start="00:00" end="23:59" bindchange="bindTimeChange">  
    <view class="picker">  
     時間 : {{times}}
    </view>  
  </picker>  
</view>  
<view class="section">  
  <picker mode="date" value="{{date}}" start="1978-01-01" end
 
="2017-1-23" bindchange="bindDateChange">  
    <view class="picker">  
      日期: {{dates}}  
    </view>  
  </picker>  
</view>  

js:

Page({
  data: {
    dates: '2016-11-08',
    times: '12:00',
    objectArray: ['中國', '英國', '美國'],
    index: 0,
  },
  //  點選時間元件確定事件  
  bindTimeChange: function
 
 (e) {
    console.log("誰哦按")
    this.setData({
      times: e.detail.value
    })
  },
  //  點選日期元件確定事件  
  bindDateChange: function (e) {
     console.log(e.detail.value)
    this.setData({
      dates: e.detail.value
    })
  },
  //  點選城市元件確定事件  
  bindPickerChange: function (e) {
     console.log(e.detail.value)
    this.setData({
      index: e.detail.value
    })
  }