Angularjs 实现移动端在线测评效果(推荐)

注：此文所用的angular版本为 1.6

一、运行效果图

二、需求

1. 点击选项时，背景变为黄色（即选中状态），并且自动切换到下一题

2. 切换到下一题时，顶部进度随之改变

3. 选中时要把对应的分值记录下来（因为要根据分值算出最后的测评结果）

4. 通过向右滑动可以查看前面做过的题目

5. 当前题目没选，无法切换到下一题

6. 当选中最后一道题目时，切换到测评结果页

三、具体实现

 题目json数据，总共10道题，这里为了节省篇幅，就只贴出3道了。 （Score是分数， OrderNo是答案序号）

{ "Questions":
 [
 { 
  "Question":"您的年龄范围:",
  "AnswerList":[
   {"Text":"30岁以下","Score":5,"OrderNo":0},
   {"Text":"30-39岁","Score":4,"OrderNo":1},
   {"Text":"40-49岁","Score":3,"OrderNo":2},
   {"Text":"50-59岁","Score":2,"OrderNo":3},
   {"Text":"60岁以上","Score":1,"OrderNo":4}]
 },
 { 
  "Question":"您的婚姻状况为:",
  "AnswerList":[
  {"Text":"未婚","Score":5,"OrderNo":1},
  {"Text":"已婚","Score":4,"OrderNo":2},
  {"Text":"单身有婚史","Score":3,"OrderNo":3},
  {"Text":"丧偶","Score":2,"OrderNo":4},
  {"Text":"不详","Score":1,"OrderNo":5}]
 },
 { 
  "Question":"您的收入需要用来供养其他人（如父母或子女）吗？",
  "AnswerList":[
  {"Text":"不需供养其他人","Score":5,"OrderNo":1},
  {"Text":"供养1人","Score":4,"OrderNo":2},
  {"Text":"供养2人","Score":3,"OrderNo":3},
  {"Text":"供养3人","Score":2,"OrderNo":4},
  {"Text":"供养4人或以上","Score":1,"OrderNo":5}]
 }
 ]
}

Html代码

<div class="wrapper" ng-controller="RiskTestController as vm">
 <div class="process-box">
 <ul>
  <li class="page-icon"><span class="icon icon-txt">1</span></li>
  <li class="page-icon"><span class="icon icon-txt">2</span></li>
  <li class="page-icon"><span class="icon icon-txt">3</span></li>
  <li class="page-icon"><span class="icon icon-txt">4</span></li>
  <li class="page-icon"><span class="icon icon-txt">5</span></li>
  <li class="page-icon"><span class="icon icon-txt">6</span></li>
  <li class="page-icon"><span class="icon icon-txt">7</span></li>
  <li class="page-icon"><span class="icon icon-txt">8</span></li>
  <li class="page-icon"><span class="icon icon-txt">9</span></li>
  <li class="page-icon"><span class="icon icon-txt">10</span></li>
 </ul>
 <div class="page-info">
  已完成 {{vm.count}}/10
 </div>
 </div>
 <ul class="list-box" id="listBox">
 <li class="list-item" ng-repeat="question in vm.questionList track by $index" ng-class="{'first-li': $index == 0}">
  <div class="question-box">
  <div class="question">{{$index + 1}}. {{question.Question}}</div>
  <ul class="answer">
   <li class="answer-item" 
   ng-repeat="answer in question.AnswerList track by $index" 
   ng-click="vm.OnClickAnswer(answer, $parent.$index)"
   ng-class="{'selected': answer.Selected}">
   {{vm.letter[$index]}}. {{answer.Text}}
   </li>
  </ul>
  </div>
 </li>
 </ul>
 <div ng-show="vm.showResult">
 <span>{{vm.point}}</span>
 </div>
 </div>

核心CSS样式代码

.wrapper{
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
 }
 .process-box{
  width: 17.25rem;
  height: 2.5rem;
  line-height: 2.5rem;
  background-color: #FFF;
  margin: 1.5rem auto;
  border-radius: 0.2rem;
 }
 .page-icon{
  float: left;
  font-size: 0.4rem;
  color: #FFE7C9;
  width: 1.32rem;
  text-align: center;
 }
 .page-info{
  font-size: 0.65rem;
  color: #F3A84D;
 }
 .question-box{
  width: 17.25rem;
  background-color: #FFF;
  margin-left: 0.75rem;
  border-radius: 0.2rem;
 }
 .question{
  font-size: 0.8rem;
  color: #43689F;
  padding: 1.1rem 0 0.8rem 0.75rem;
 }
 .answer-item{
  font-size: 0.75rem;
  color: #80A1D0;
  border-top: 1px solid #EEE;
  padding: 1.1rem 0 1.1rem 1.0rem;
 }
 .icon-txt{
  background-color: orange;
  border-radius: 0.5rem;
  display: block;
  width: 0.8rem;
  height: 0.8rem;
  line-height: 0.8rem;
  margin: 0.95rem auto;
 }
 .icon-txt-active{
  background-color: #FFE7C9;
  border-radius: 0.3rem;
  display: block;
  width: 0.3rem;
  height: 0.3rem;
  line-height: 2.0rem;
  color: #FFF;
  margin: 1.25rem auto;
 }
 .list-item {
  width: 100%;
  position: absolute;
  transform: translate3d(100%,0,0);
  transition: transform 0.5s;
 }
 .first-li {
  transform: translate3d(0,0,0);
 }
 .selected {
  background-color: orange;
 }

控制器代码（Controller）

(function (agr) {
 //模块 - app
 var app = agr.module('app', []);
 //控制器 - 风险测评
 app.controller('RiskTestController', ['$scope', '$http', RiskTestController]);
 function RiskTestController($scope, $http) {
 var vm = this;
 vm.letter = ['A', 'B', 'C', 'D', 'E']; //答案编号
 vm.questionList = []; //题目
 vm.point = 0;  //得分
 vm.showResult = false; //是否显示结果页
 //加载数据 
 $http({
  method: 'GET',
  url: '/Service/RiskTest',
 }).then(function (resp) {  
  vm.questionList = resp.data.Questions;
 }, function (resp) {
  console.log("ERROR", resp);
 });
 var lis = document.querySelectorAll(".list-item"), //题目列表
  count = 0, //做了多少道题
  index = 0, //当前第几题
  BIG = 9; //最大索引值，因为总共10道题，所以是9（常量）
 //选择答案
 vm.OnClickAnswer = function (answer, $parentIndex) {

  var icons = document.querySelectorAll(".icon"),
  curr = $parentIndex; //当前题目索引
  next = $parentIndex + 1; //下一题索引
  nextQuestion = vm.questionList[next]; //下一道题
  //当前问题的答案列表
  var answerList = vm.questionList[$parentIndex].AnswerList;
  //为每个答案对象添加属性 Selected, 默认值为false
  for (var i = 0, len = answerList.length; i < len; i++) {
  answerList[i].Selected = false;
  }
  //将选中的答案设置为true (从而应用样式.selected 将背景色设置为黄色)
  answer.Selected = true;
  //判断是否为最后一道题
  if ($parentIndex < BIG) { //不是最后一题
  //改变顶部进度样式
  icons[curr].classList.remove("icon-txt");
  icons[curr].classList.add("icon-txt-active");
  //切换到下一题
  lis[curr].style.webkitTransform = 'Translate3d(-100%,0,0)';
  nextQuestion && (lis[next].style.webkitTransform = 'Translate3d(0,0,0)');
  } else { //是最后一题
  //改变顶部进度样式
  icons[curr].classList.remove("icon-txt");
  icons[curr].classList.add("icon-txt-active");
  //计算分数
  vm.point = CalcPoint();
  //显示测评结果
  vm.showResult = true;
  }
  //做了多少题
  count = CalcCount();

  //因为选中答案会自动切换到下一题，所以索引更新为next
  index = next;  
 }
 //计算分数
 var CalcPoint = function () {
  var point = 0;
  for (var i = 0, lenq = vm.questionList.length; i < lenq; i++) {
  for (var k = 0, lena = vm.questionList[i].AnswerList.length; k < lena; k++) {
   if (vm.questionList[i].AnswerList[k].Selected) {
   point += vm.questionList[i].AnswerList[k].Score;
   }
  }
  }
  return point;
 }
 //计算当前做了多少道题
 var CalcCount = function(){
  var count = 0;
  for (var i = 0, lenq = vm.questionList.length; i < lenq; i++) {
  for (var k = 0, lena = vm.questionList[i].AnswerList.length; k < lena; k++) {
   if (vm.questionList[i].AnswerList[k].Selected) {
   count++;
   }
  }
  }
  return count;
 }
 /** 触屏滑动效果处理 == 开始 == **/
 var offsetX = 0, //手指滑动偏移量
  startX,  //滑动开始时的X轴坐标点
  startTime; //手指滑动开始时间
 //触屏开始
 var startHandler = function (evt) {
  //每次触屏时将偏移量重置为0
  offsetX = 0;
  //记录X坐标
  startX = evt.touches[0].pageX;
  //取得时间戳
  startTime = new Date() * 1;
 };
 //触屏滑动
 var moveHandler = function (evt) {
  //阻止默认事件
  evt.preventDefault();
  //记录手指滑动的偏移量
  offsetX = evt.touches[0].pageX - startX;
  var curr = index,
  prev = index - 1,
  next = index + 1,
  prevQuestion = vm.questionList[prev],
  nextQuestion = vm.questionList[next],
  width = window.innerWidth; 
  //手指滑动时题卡跟着手指滑动（向右滑：[偏移量大于0，即正数，并且不是第一道题]）
  if (offsetX > 0 && index > 0) {
  lis[curr].style.webkitTransform = 'Translate3d(' + offsetX + 'px, 0, 0)';
  prevQuestion && (lis[prev].style.webkitTransform = 'Translate3d(' + (offsetX - width) + 'px, 0, 0)');
  }
  //手指滑动时题卡跟着手指滑动（向左滑：[偏移量小于0，即负数，并且不是最后一题]）
  if (offsetX < 0 && index < count) {
  lis[curr].style.webkitTransform = 'Translate3d(' + offsetX + 'px, 0, 0)';
  nextQuestion && (lis[next].style.webkitTransform = 'Translate3d(' + (offsetX + width) + 'px, 0, 0)');
  }
 };
 //触屏结束
 var endHandler = function (evt) {
  var boundary = window.innerWidth / 5, //当手指滑动的偏移量为屏幕的5分之一时才进行切换
  quickBoundary = 60,   //当手指快速滑动时，偏移量为60即可 
  endTime = new Date() * 1;   //获取结束时间戳
  //判断是否为快速滑动
  if (endTime - startTime > 1000) {
  //判断是向左滑还是向右滑
  if (offsetX > 0) {
   //判断是否达到切换偏移量
   if (offsetX >= boundary) {
   MoveToRight();
   } else {
   ResetMoveRight();
   }
  } else{
   if (offsetX < -boundary) {
   MoveToLeft();
   } else {
   ResetMoveLeft();
   }
  }
  } else {
  if (offsetX > 0) {
   if (offsetX >= quickBoundary) {
   MoveToRight();
   } else {
   ResetMoveRight();
   }
  } else {
   if (offsetX < -quickBoundary) {
   MoveToLeft();
   } else {
   ResetMoveLeft();
   }
  }
  }
 };
 //向右滑动事件
 var MoveToRight = function () {
  var curr = index,
  prev = index -1,
  prevQuestion = vm.questionList[prev];
  if (curr > 0) {
  lis[curr].style.webkitTransform = 'Translate3d(100%, 0, 0)';
  prevQuestion && (lis[prev].style.webkitTransform = 'Translate3d(0, 0, 0)');
  index--;
  }  
 }
 //右滑重置(当滑动距离没达到切换偏移量时，题卡回到原点)
 var ResetMoveRight = function () {
  var curr = index,
  prev = index -1,
  prevQuestion = vm.questionList[prev];
  lis[curr].style.webkitTransform = 'Translate3d(0, 0, 0)';
  prevQuestion && (lis[prev].style.webkitTransform = 'Translate3d(-100%, 0, 0)');
 }
 //向左滑动事件
 var MoveToLeft = function () {
  var curr = index,
  next = index + 1,
  nextQuestion = vm.questionList[next];
  if (curr < count) {
  lis[curr].style.webkitTransform = 'Translate3d(-100%, 0, 0)';
  nextQuestion && (lis[next].style.webkitTransform = 'Translate3d(0, 0, 0)');
  index++;
  } 
 }
 //左滑重置(当滑动距离没达到切换偏移量时，题卡回到原点)
 var ResetMoveLeft = function () {
  var curr = index,
  next = index + 1,
  nextQuestion = vm.questionList[next];
  lis[curr].style.webkitTransform = 'Translate3d(0, 0, 0)';
  nextQuestion && (lis[next].style.webkitTransform = 'Translate3d(100%, 0, 0)');
 }
 //监听滑动事件 
 var outer = document.getElementById("listBox");
 outer.addEventListener('touchstart', startHandler);
 outer.addEventListener('touchmove', moveHandler);
 outer.addEventListener('touchend', endHandler);
 

 /** 触屏滑动效果处理 == 结束 == **/
 }
})(angular);

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