Vue案例：小笔记本
外观
笔记本分三个部分：
- 输入框添加
- 事项列表
- 选择删除部分
输入框添加
输入框会监听enter键，当点击enter键或者是傍边的加号按钮时，获取输入框的内容，然后调用add方法，把输入框的内容添加到事项列表中，并将show属性设置为false状态，这是来实现事项是否完成，然后将输入框的内容清空。
<div class="input-box">
<input type="text" ref="inputValue" @keyup.enter='add'>
<i @click='add'></i>
</div>
add() {
if (this.$refs.inputValue.value === '') return
this.incident.unshift({
text: this.$refs.inputValue.value,
show: false
})
this.$refs.inputValue.value = ''
},
输入
添加
事项列表
事项的组成有三部分，一是完成按钮，二是事项内容，三是删除按钮，完成按钮点击后表示事项已经完成，内容会出现一条删除线，再点击一下取消完成，后面的删除按钮可以进行单条事项的删除。
<ul class="text-box" ref="textbox">
<li v-for='(item,index) in incident' :key="index">
<div>
<i @click='finish(index)' :class='{settle:item.show}'></i>
</div>
<p><s :style='{textDecoration:item.show?"line-through":"none"}'>{{item.text}}</s></p>
<i class="deletebutton" @click='deleteli(index)'></i>
</li>
</ul>
finish(a) {
// this.incident[a].show = !this.incident[a].show
this.$set(this.incident[a], 'show', !this.incident[a].show)
},
deleteli(a) {
if (confirm('确定要删除吗？')) {
this.incident.splice(a, 1)
}
},
完成
选择删除部分
选择删除部分，左边有一个统计完成事项，右边是选择删除按钮，统计完成的事项只会是已经点上已完成的才会统计，勾选完成的可以点击删除按钮把完成的事项全部删掉。
<div class="statistics-box" v-if='incident.length !== 0'>
<p>完成了{{statistics}}件事</p>
<button @click='selectdel'>删除</button>
</div>
selectdel() {
if (this.statistics === 0) return alert('还没完成什么事呢')
if (confirm('确定删除选中的吗？')) {
this.incident = this.incident.filter((item) => {
return item.show !== true
})
}
}
删除选中
以下是全部代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>小笔记本</title>
<link rel="stylesheet" href="./css/index.css">
</head>
<body>
<div id="app">
<div class="big-box">
<!-- 标题 -->
<h3>{{title}}</h3>
<!-- 添加输入框，添加按钮 -->
<div class="input-box">
<input type="text" ref="inputValue" @keyup.enter='add'>
<i @click='add'></i>
</div>
<!--笔记内容 -->
<ul class="text-box" ref="textbox">
<li v-for='(item,index) in incident' :key="index">
<div>
<i @click='finish(index)' :class='{settle:item.show}'></i>
</div>
<p><s :style='{textDecoration:item.show?"line-through":"none"}'>{{item.text}}</s></p>
<i class="deletebutton" @click='deleteli(index)'></i>
</li>
</ul>
<!--删除、统计按钮 -->
<div class="statistics-box" v-if='incident.length !== 0'>
<p>完成了{{statistics}}件事</p>
<button @click='selectdel'>删除</button>
</div>
</div>
</div>
<script src="../../js/vue.js"></script>
<script src="./js/index.js"></script>
</body>
</html>
body {
margin: 0;
padding: 0;
background-image: linear-gradient(90deg, #f093fb 0%, #f5576c 100%);
}
h3,
i,
ul,
li,
p,
input {
margin: 0;
padding: 0;
border: 0;
list-style: none;
}
.big-box {
width: 30%;
background-color: rgb(24, 22, 61);
border-radius: 10px;
margin: 100px auto;
box-shadow: 0 3px 6px rgba(24, 22, 61, 0.3);
overflow: hidden;
}
.big-box h3 {
text-align: center;
font-size: 20px;
padding: 8px;
color: white;
}
.input-box {
height: 38px;
width: 100%;
padding: 0 24px;
box-sizing: border-box;
margin: 10px 0;
}
.input-box input {
float: left;
width: 85%;
height: 36px;
border: 0;
border-bottom: 2px solid #777;
background-color: transparent;
color: #999;
font-size: 20px;
outline: none;
}
.input-box i {
float: left;
display: block;
width: 15%;
height: 36px;
background: url('../images/jia.png') no-repeat;
background-position: 6px 6px;
background-size: 30px;
cursor: pointer;
}
.text-box {
width: 100%;
padding-left: 24px;
box-sizing: border-box;
max-height: 200px;
overflow-y: auto;
}
.text-box::-webkit-scrollbar {
display: none
}
.text-box li {
width: 80%;
height: 34px;
background-color: rgb(43, 41, 83);
margin: 10px 0;
border-radius: 34px;
overflow: hidden;
display: flex;
align-items: center;
}
.text-box li div {
width: 12%;
height: 100%;
text-align: center;
line-height: 38px;
}
.text-box li div i {
display: inline-block;
width: 18px;
height: 18px;
border-radius: 18px;
background-color: rgb(108, 105, 150);
cursor: pointer;
}
.text-box li div .settle {
background: url('../images/xz.png') no-repeat;
background-size: 18px;
background-position: 100%;
}
.text-box li p {
width: 70%;
color: #999;
overflow: hidden;
}
.text-box li .deletebutton {
display: block;
width: 18%;
height: 100%;
background: url('../images/sc.png') no-repeat;
background-size: 20px;
background-position: 50%;
cursor: pointer;
}
.statistics-box {
height: 42px;
width: 100%;
}
.statistics-box p {
float: left;
margin-left: 16px;
color: white;
margin-top: 10px;
}
.statistics-box button {
float: right;
width: 60px;
height: 28px;
color: white;
background-color: rgb(245, 87, 108);
border: 0;
border-radius: 5px;
margin-top: 5px;
margin-right: 16px;
}
nt.unshift({
text: this.$refs.inputValue.value,
show: false
})
this.$refs.inputValue.value = ''
},
finish(a) {
// this.incident[a].show = !this.incident[a].show
this.$set(this.incident[a], 'show', !this.incident[a].show)
},
deleteli(a) {
if (confirm('确定要删除吗？')) {
this.incident.splice(a, 1)
}
},
selectdel() {
if (this.statistics === 0) return alert('还没完成什么事呢')
if (confirm('确定删除选中的吗？')) {
this.incident = this.incident.filter((item) => {
return item.show !== true
})
}
}
},
computed: {
statistics() {
let a = 0
this.incident.forEach(element => {
if (element.show) {
a = a + 1
}
});
return a
}
}
})
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