作业
1. 先有一下成绩单数据
scores = [
{ name: 'Bob', math: 97, chinese: 89, english: 67 },
{ name: 'Tom', math: 67, chinese: 52, english: 98 },
{ name: 'Jerry', math: 72, chinese: 87, english: 89 },
{ name: 'Ben', math: 92, chinese: 87, english: 59 },
{ name: 'Chan', math: 47, chinese: 85, english: 92 },
]
用table表格标签渲染以上数据,表格第一列是学生总分排名,最后一列是学生总分;
思路:逻辑都在js模块中,用scores变量保存,然后对这个socres进行遍历,把stu对象中的各个数据进行相加,然后用一个数组把加完的数据存起来,用于在表格中展示。
在模板中通过循环将stu对象展示出来,先展示索引,再展示对应的值
先通过冒泡排序,把total排序好,然后再展示
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<div id="app">
<table border="1" width="400" rules="margin:auto">
<tr>
<th>排名</th>
<th>姓名</th>
<th>数学</th>
<th>语文</th>
<th>英语</th>
<th>总分</th>
</tr>
<tr v-for="(stu,i) in scores">
<td>{{ i+1}}</td>
<td v-for="v in stu">{{ v}}</td>
</tr>
</table>
</div>
</body>
<script src="js/vue.js"></script>
<script>
let scores = [
{name: 'Bob', math: 97, chinese: 89, english: 67},
{name: 'Tom', math: 67, chinese: 52, english: 98},
{name: 'Jerry', math: 72, chinese: 87, english: 89},
{name: 'Ben', math: 92, chinese: 87, english: 59},
{name: 'Chan', math: 47, chinese: 85, english: 92},
];
let total_scores = [];
for (stu of scores){
stu.total = stu.math + stu.chinese + stu.english;
total_scores.push(stu);
}
for (let i=0;i<total_scores.length-1;i++){
for (let j=0;j<total_scores.length-1-i;j++){
if (total_scores[j].total<total_scores[j+1].total){
let t=total_scores[j];
total_scores[j] = total_scores[j+1];
total_scores[j+1]=t;
}
}
}
console.log(total_scores);
new Vue({
el:'#app',
data:{
scores:total_scores,
}
});
</script>
</html>
2.用上面的数据,采用相同的渲染规则,只渲染所有科目都及格了的学生。
思路就是在for循环中加入一个if判断,将及格的数据都筛选出来展示
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<div id="app">
<table border="1" width="400" rules="margin:auto">
<tr>
<th>排名</th>
<th>姓名</th>
<th>数学</th>
<th>语文</th>
<th>英语</th>
<th>总分</th>
</tr>
<!--添加筛选条件-->
<tr v-for="(stu,i) in scores" v-if="stu.math>60&&stu.chinese>60&&stu.english>60">
<td>{{ i+1}}</td>
<td v-for="v in stu">{{ v}}</td>
</tr>
</table>
</div>
</body>
<script src="js/vue.js"></script>
<script>
let scores = [
{name: 'Bob', math: 97, chinese: 89, english: 67},
{name: 'Tom', math: 67, chinese: 52, english: 98},
{name: 'Jerry', math: 72, chinese: 87, english: 89},
{name: 'Ben', math: 92, chinese: 87, english: 59},
{name: 'Chan', math: 47, chinese: 85, english: 92},
];
let total_scores = [];
for (stu of scores){
stu.total = stu.math + stu.chinese + stu.english;
total_scores.push(stu);
}
for (let i=0;i<total_scores.length-1;i++){
for (let j=0;j<total_scores.length-1-i;j++){
if (total_scores[j].total<total_scores[j+1].total){
let t=total_scores[j];
total_scores[j] = total_scores[j+1];
total_scores[j+1]=t;
}
}
}
console.log(total_scores);
new Vue({
el:'#app',
data:{
scores:total_scores,
}
});
</script>
</html>
3.还是采用上方相同的数据,添加筛选规则:
i)有三个按钮:语文、数学、外语,点击谁谁高亮,且当前筛选规则采用哪门学科
ii)两个输入框,【】~【】,前面天最小分数,后面填最大分数,全部设置完毕后,表格的数据会被更新只渲染满足所有条件的结果
举例:点击语文,输入【86】~【87】,那就只会渲染Jerry和Ben两条数据
思路:
1、点击高亮
首先应该给一个类,这个类设置一个高亮样式,然后把类绑定给按钮,但是要给一个k-v形式的类,v用于控制这个类是否为true(是否起作用),再一个是把按钮绑定一个点击事件(包着一个含有参数的方法,这个方法就是用于判断前面的类的样式是否显示),所以一个逻辑过程,就是鼠标点击按钮,会把参数传到vue中,再把当前的rule进行设置,于是就可以将类(对应的css样式)展示出来
2、输入框,筛选数据
输入框绑定的v-model,控制input中的value,然后输出的数据是在第一种的基础上面,加了v-if(逻辑实现输入框没有数据或只有一个有数据就会展示全部学生数据,在区间内,存在的数据),会把满足筛选条件的数据展示出来。
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<title></title>
<style>
.action {
background-color: pink;
}
</style>
</head>
<body>
<div id="app">
<p style="margin: 10px auto; width: 400px">
<button :class="{action: rule === 'chinese'}" @click="clickAction('chinese')">语文</button>
<button :class="{action: rule === 'math'}" @click="clickAction('math')">数学</button>
<button :class="{action: rule === 'english'}" @click="clickAction('english')">英语</button>
<input type="number" min="1" max="100" v-model="min">
~
<input type="number" min="1" max="100" v-model="max">
</p>
<table border="1" width="400" rules="all" style="margin: auto">
<tr>
<th>排名</th>
<th>姓名</th>
<th>数学</th>
<th>语文</th>
<th>英语</th>
<th>总分</th>
</tr>
<tbody v-if="rule === 'math'">
<tr v-for="(stu,i) in scores" v-if="(min && max && stu.math >= +min && stu.math <= +max) || (!min || !max)"> #
<td>{{ i + 1 }}</td>
<td v-for="v in stu">{{ v }}</td>
</tr>
</tbody>
<!--第一步是筛选是否有高亮按钮-->
<tbody v-else-if="rule === 'chinese'">
<!--第一个and筛选框是否空,第二个筛选是否有在输入框间的数据,第三个||筛选是否一个有数据,一个没有数据-->
<tr v-for="(stu,i) in scores" v-if="(min && max && stu.chinese >= +min && stu.chinese <= +max) || (!min || !max)">
<td>{{ i + 1 }}</td>
<td v-for="v in stu">{{ v }}</td>
</tr>
</tbody>
<tbody v-else-if="rule === 'english'">
<tr v-for="(stu,i) in scores" v-if="(min && max && stu.english >= +min && stu.english <= +max) || (!min || !max)">
<td>{{ i + 1 }}</td>
<td v-for="v in stu">{{ v }}</td>
</tr>
</tbody>
<tbody v-else>
<tr v-for="(stu,i) in scores">
<td>{{ i + 1 }}</td>
<td v-for="v in stu">{{ v }}</td>
</tr>
</tbody>
</table>
</div>
</body>
<script src="js/vue.js"></script>
<script>
let scores = [
{name: 'Bob', math: 97, chinese: 89, english: 67},
{name: 'Tom', math: 67, chinese: 52, english: 98},
{name: 'Jerry', math: 72, chinese: 87, english: 89},
{name: 'Ben', math: 92, chinese: 87, english: 59},
{name: 'Chan', math: 47, chinese: 85, english: 92},
];
let total_scores = [];
for (stu of scores) {
stu.total = stu.math + stu.chinese + stu.english;
total_scores.push(stu);
}
for(let i = 0; i < total_scores.length - 1; i++) {
for(let j = 0; j < total_scores.length - 1 - i; j++) {
if (total_scores[j].total < total_scores[j+1].total) {
let t = total_scores[j];
total_scores[j] = total_scores[j+1];
total_scores[j+1] = t;
}
}
}
console.log(total_scores);
new Vue({
el: '#app',
data: {
scores: total_scores,
rule: '',
min: '',
max: '',
},
methods: {
clickAction(rule) {
this.rule = rule;
}
}
});
</script>
</html>