微信小程序template模板的使用。

首先看一些官方的一些介绍。
模板：模板功能是通过对template 标签的属性 name=”” 去创建不同模板，通过is=”name的值”来使用。

template使用.png template使用.png

通过上面两张图，大概能看出，使用模板可以为大量类似的布局带来便利。下面看一下我自己的一个Demo.

先放出效果图（数据来自聚合数据）

Paste_Image.png Paste_Image.png Paste_Image.png

可以看到，除了选项个数的差别之外，其他布局是相同的。

下面的每一道题的模板。

<template name="carItem">
  <view class="timu">
    <view class="title">第{{item.id}}题</view>
    <view class='question'>{{item.question}}</view>
    <view class="img" wx:if="{{item.url!=''}}"><image src="{{item.url}}" /></view>
    <view class='select'>A：{{item.item1}}</view>
    <view class='select'>B：{{item.item2}}</view>
    <view class='select' wx:if="{{item.item3!=''}}">C:{{item.item3}}</view>
    <view class='select' wx:if="{{item.item4!=''}}">D:{{item.item4}}</view>
    <view class='content'>答案:{{item.answer}}</view>
    <view class='content'>解释:{{item.explains}}</view>
 </view>
</template>

在我们上面的代码中，除了使用template标签定义模板外，还是用了条件渲染。例如当题目为判断题的时候。CD选项是没有数据的，所以就不能显示出来，我们可以通过if语句判断是否为空来决定显示与否。

下面放出代码。

CarUtils.js

/**
 * 网络请求
 */
function request(url, subject, model, testType, success, fail) {
    if (typeof success != 'function' || typeof fail != 'function') {
        return
    }
    wx.request({
        url: url,
        data: {
            key: "5f0c9315c43385f5baaa3f49b79caa8f",
            subject: subject,
            model: model,
            testType: testType,
            
        },
        success: function (res) {
            if (res.data.error_code == 0) {
                console.log("获取数据成功"),
                    success(res.data)
            } else {
                wx.showModal({
                    title: '提示',
                    content: 'res.data.reason'+'请重新选择',
                    success: function (res) {
                        if (res.confirm) {
                            console.log('用户点击确定')
                        }
                    }
                })
                console.log("失败原因" + res.data.reason)
                fail(res.data.reason)
            }
        },
        fail: function () {
            fail('网络出现问题')
        },
    })
}
function getanswer(url,success,fail){
      if( typeof success != 'function' || typeof fail != 'function' ) {
    return
  }
      wx.request({
        url:url,
        data: {
            key:"0794b823b484d6e1b4186d150834ae1b",
        },
        success: function(res){
         if( res.data.error_code == 0 ) {
                console.log("获取数据成功"),
                success( res.data )
            } else {
                console.log("失败原因"+res.data.reason)
                fail( res.data.reason )
            }
        },
        fail: function() {
           fail( '网络出现问题' )
        },
      })
}
module.exports = {
    request: request,
    getanswer:getanswer
}

template.wxml

<template name="carItem">
  <view class="timu">
    <view class="title">第{{item.id}}题</view>
    <view class='question'>{{item.question}}</view>
    <view class="img" wx:if="{{item.url!=''}}"><image src="{{item.url}}" /></view>
    <view class='select'>A：{{item.item1}}</view>
    <view class='select'>B：{{item.item2}}</view>
    <view class='select' wx:if="{{item.item3!=''}}">C:{{item.item3}}</view>
    <view class='select' wx:if="{{item.item4!=''}}">D:{{item.item4}}</view>
    <view class='content'>答案:{{item.answer}}</view>
    <view class='content'>解释:{{item.explains}}</view>
 </view>
</template>

选择界面 drivercar.js

Page({
  data:{
    subject: [
      {name: '1', value: '科目一',checked: 'true'},
      {name: '4', value: '科目四'},
  
    ],
    model: [
      {name: 'c1', value: 'c1',checked: 'true'},
      {name: 'c2', value: 'c2'},
      {name: 'a1', value: 'a1'},
      {name: 'a2', value: 'a2'},
      {name: 'b1', value: 'b1'},
      {name: 'b2', value: 'b2'},
     
    ],
    testType: [
      {name: 'rand', value: '随机（100条）',checked: 'true'},
      {name: 'order', value: '全部（全部）'},
    ],


  },
  onLoad:function(options){
  var that = this;
    that.setData({
      subject1:"1",
      model1:"c1",
      testType1:"rand"
    })
  },
  confirm(){
    var that=this;
     wx.navigateTo({
      url: 'detail/detail?subject='+that.data.subject1+'&model='+that.data.model1+'&testType='+that.data.testType1,
    });
  },
    confirm1(){
    var that=this;
     wx.navigateTo({
      url: 'detail_1/detail_1?subject='+that.data.subject1+'&model='+that.data.model1+'&testType='+that.data.testType1,
    });
  },
  //科目类型
  subjectChange(e){ 
    var that = this;
    console.log('科目类型：'+e.detail.value);
    that.setData({
      subject1:e.detail.value,
      
    })
  } ,
   //驾照类型
   modelChange(e){
    var that = this;
    console.log('驾照类型：'+e.detail.value);
    that.setData({
      model1:e.detail.value,
    })
  } ,
  //测试类型
   testTypeChange(e){
     var that = this;
    console.log('测试类型：'+e.detail.value);
    that.setData({
      testType1:e.detail.value,
    })
  } ,

})

选择界面drivercar.wxml

<view class="container">
<!--radio-->
 <view class="radio">
  <text>请选择考试类型：</text>
    <radio-group class="radio-group" bindchange="subjectChange">
        <label class="radio" wx:for="{{subject}}" wx:key="subject">
            <radio value="{{item.name}}" checked="{{item.checked}}"/>{{item.value}}
     </label>
    </radio-group>
  </view>
  <view class="radio">
  <text>请选择驾照类型：</text>
    <radio-group class="radio-group" bindchange="modelChange" >
         <label class="radio" wx:for="{{model}}" wx:key="model">
                <radio value="{{item.name}}" checked="{{item.checked}}"/>{{item.value}}
         </label>
     </radio-group>
 </view>
  <view class="radio">
  <text>请选择模式：</text>
    <radio-group class="radio-group" bindchange="testTypeChange" >
         <label class="radio" wx:for="{{testType}}" wx:key="testType">
                <radio value="{{item.name}}" checked="{{item.checked}}"/>{{item.value}}
         </label>
     </radio-group>
 </view>
    <!--button-->
    <text class="nav" bindtap="confirm">确定选择</text>
</view>

选择界面drivercar.wxss

.radio{ margin: 20rpx;}
.radio text{margin: 20rpx;}
.nav {
     border: 1px solid #DFDFDF;
    border-radius: 10px;
    text-align: center;
    width: 50%;
    float: left;
    height: 60rpx;
    line-height: 60rpx;
    margin-bottom:30rpx;
    margin-top: 30rpx;
    margin-left:25%;
    margin-right:25%;

}

题目界面detail.js

var util = require('../../../../Utils/CarUtils.js')
var url = 'http://api2.juheapi.com/jztk/query'
var answerurl = "http://api2.juheapi.com/jztk/answers"
Page({
    data: {
        loadingHide: false,
        ResList: {
            "error_code": 0,
            "reason": "success",
            "result": {
                1: "A",
                2: "B",
                3: "C",
                4: "D",
                7: "AB",
                8: "AC",
                9: "AD",
                10: "BC",
                11: "BD",
                12: "CD",
                13: "ABC",
                14: "ABD",
                15: "ACD",
                16: "BCD",
                17: "ABCD"
            }
        },
    },
    onLoad: function (options) {

        var that = this
        var z=1;
        var mTimuLIs={}
        util.request(url, options.subject, options.model, options.testType, function (dataJson) {
            console.log(options.model + "model");
            console.log(options.testType + "testType");
            console.log(options.subject + "subject");
            console.log("请求成功00");
            
            mTimuLIs=dataJson["result"];
            console.log(mTimuLIs.length);
            for (var i = 0; i < mTimuLIs.length; i++) {
               
                //console.log(that.data.ResList.result[1]);
                var y= parseInt(mTimuLIs[i].answer);
                 //console.log(y);
                mTimuLIs[i].answer = that.data.ResList.result[y];
                mTimuLIs[i].id=parseInt(i+z);
               // console.log(that.data.ResList.result[y]);
            }
            that.setData({
                mTimuLIs: mTimuLIs,
                loadingHide: true
            })
        },
            function (reason) {
                console.log(reason);
                that.setData({
                    loadingHide: true
                })
            })
    },
})

题目界面 detail.wxml

<import src="../../../../common/templet.wxml"/>
<scroll-view scroll-y="true" class="page-body" >
     <template is="carItem" data="{{item}}" wx:for="{{mTimuLIs}}" wx:key="TimuList"/>
</scroll-view>
<loading hidden="{{loadingHide}}">
    加载中...
</loading>

全局样式 app.wxss

.container {
  height:100%;
  flex: 1;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  background-size: 100%;
} 
.item-view{
    padding: 10px;
    display: flex;
    flex-direction: column;
    border-top: 1px solid #DEDEDE;
    border-left: 1px solid #DEDEDE;
    box-shadow: 2px 2px 2px #C7C7C7;
    margin: 10px;
    border-radius: 5px;
}

.item-view .content{color: black;}
.item-view .date{ color: grey;margin-top: 10px;}
.item-view image{width: 100%;height: 400rpx;margin-top: 10rpx;}
.loading-view{display: flex;flex-direction: row; justify-content: center;align-items: center;padding: 10px;}



.timu{border: 1px solid #DFDFDF;margin: 20rpx;border-radius: 10px;}
.timu .title{font-size: 40rpx; }
.timu .question{text-indent: 20rpx;margin-left: 10rpx; padding: 10rpx;}
.timu .img{width: 100%;display:flex;flex-direction: column;align-items: center;margin: 0 auto;padding-top: 10rpx;padding-bottom: 10rpx;}
.timu .content{font-size: 30rpx;padding: 10rpx;margin-left: 20rpx }
.timu .select{font-size: 30rpx;margin-left: 30rpx;margin-right: 30rpx; padding: 20rpx; }