vue实现留言板todolist功能
2020-11-27
来源：尚佳旅游分享网
通过前面两篇文章的的学习，我们掌握了vue的基本用法. 本文，就利用这些基础知识来实现一个留言板， 老外把他称之为todolist.
第一步、使用bootstrap做好布局
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <link rel="stylesheet" href="lib/bootstrap.min.css"/> <script src="lib/jquery-1.7.2.js"></script> <script src="lib/bootstrap.js"></script> </head> <body> <div class="container"> <form role="form"> <div class="form-group"> <label for="username">用户名:</label> <input type="text" id="username" class="form-control" placeholder="输入用户名"> </div> <div class="form-group"> <label for="age">年 龄:</label> <input type="text" id="age" class="form-control" placeholder="输入年龄"> </div> <div class="form-group"> <input type="button" value="添加" class="btn btn-primary"> <input type="button" value="重置" class="btn btn-danger"> </div> </form> <hr> <table class="table table-bordered table-hover"> <caption class="h2 text-info">用户信息表</caption> <tr class="text-danger"> <th class="text-center">序号</th> <th class="text-center">名字</th> <th class="text-center">年龄</th> <th class="text-center">操作</th> </tr> <tr class="text-center"> <td>1</td> <td>张三</td> <td>20</td> <td> <button class="btn btn-primary btn-sm">删除</button> </td> </tr> <tr class="text-center"> <td>2</td> <td>李四</td> <td>22</td> <td> <button class="btn btn-primary btn-sm">删除</button> </td> </tr> <tr> <td colspan="4" class="text-right"> <button class="btn btn-danger btn-sm">删除全部</button> </td> </tr> <tr> <td colspan="4" class="text-center text-muted"> <p>暂无数据....</p> </td> </tr> </table> </div> </body> </html>
第二步、增加模态框，模态框默认为隐藏的
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <link rel="stylesheet" href="lib/bootstrap.min.css"/> <script src="lib/jquery-1.7.2.js"></script> <script src="lib/bootstrap.js"></script> </head> <body> <div class="container"> <form role="form"> <div class="form-group"> <label for="username">用户名:</label> <input type="text" id="username" class="form-control" placeholder="输入用户名"> </div> <div class="form-group"> <label for="age">年 龄:</label> <input type="text" id="age" class="form-control" placeholder="输入年龄"> </div> <div class="form-group"> <input type="button" value="添加" class="btn btn-primary"> <input type="button" value="重置" class="btn btn-danger"> </div> </form> <hr> <table class="table table-bordered table-hover"> <caption class="h2 text-info">用户信息表</caption> <tr class="text-danger"> <th class="text-center">序号</th> <th class="text-center">名字</th> <th class="text-center">年龄</th> <th class="text-center">操作</th> </tr> <tr class="text-center"> <td>1</td> <td>张三</td> <td>20</td> <td> <button class="btn btn-primary btn-sm" data-toggle="modal" data-target="#layer">删除</button> </td> </tr> <tr class="text-center"> <td>2</td> <td>李四</td> <td>22</td> <td> <button class="btn btn-primary btn-sm" data-toggle="modal" data-target="#layer">删除</button> </td> </tr> <tr> <td colspan="4" class="text-right"> <button class="btn btn-danger btn-sm">删除全部</button> </td> </tr> <tr> <td colspan="4" class="text-center text-muted"> <p>暂无数据....</p> </td> </tr> </table> <!--模态框 弹出框--> <div role="dialog" class="modal fade bs-example-modal-sm" id="layer"> <div class="modal-dialog"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal"> <span>×</span> </button> <h4 class="modal-title">确认删除么?</h4> </div> <div class="modal-body text-right"> <button data-dismiss="modal" class="btn btn-primary btn-sm">取消</button> <button data-dismiss="modal" class="btn btn-danger btn-sm">确认</button> </div> </div> </div> </div> </div> </body> </html>
第三步、定义userList用来保存用户，userName保存用户名, age保存用户变量， 然后把userName和age 通过 v-model指令绑定到对应的输入框，实现输入框与变量中的数据双向驱动，在表格的行中输出userList
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="lib/bootstrap.min.css"/>
<script src="lib/jquery-1.7.2.js"></script>
<script src="lib/bootstrap.js"></script>
<script src="../js/vue.js"></script>
<script>
window.onload = function () {
var c = new Vue({
el: '#box',
data: {
userList: [],
userName : '',
age : ''
}
});
}
</script>
</head>
<body>
<div class="container" id="box">
<form role="form">
<div class="form-group">
<label for="username">用户名:</label>
<input type="text" id="username" v-model="userName" class="form-control" placeholder="输入用户名">
</div>
<div class="form-group">
<label for="age">年 龄:</label>
<input type="text" id="age" v-model="age" class="form-control" placeholder="输入年龄">
</div>
<div class="form-group">
<input type="button" value="添加" class="btn btn-primary">
<input type="button" value="重置" class="btn btn-danger">
</div>
</form>
<hr>
<table class="table table-bordered table-hover">
<caption class="h2 text-info">用户信息表</caption>
<tr class="text-danger">
<th class="text-center">序号</th>
<th class="text-center">名字</th>
<th class="text-center">年龄</th>
<th class="text-center">操作</th>
</tr>
<tr class="text-center" v-for="value in userList">
<td>{{$index+1}}</td>
<td>{{value.name}}</td>
<td>{{value.age}}</td>
<td>
<button class="btn btn-primary btn-sm" data-toggle="modal" data-target="#layer">删除</button>
</td>
</tr>
<tr>
<td colspan="4" class="text-right">
<button class="btn btn-danger btn-sm">删除全部</button>
</td>
</tr>
<tr>
<td colspan="4" class="text-center text-muted">
<p>暂无数据....</p>
</td>
</tr>
</table>
<!--模态框 弹出框-->
<div role="dialog" class="modal fade bs-example-modal-sm" id="layer">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">
<span>×</span>
</button>
<h4 class="modal-title">确认删除么?</h4>
</div>
<div class="modal-body text-right">
<button data-dismiss="modal" class="btn btn-primary btn-sm">取消</button>
<button data-dismiss="modal" class="btn btn-danger btn-sm">确认</button>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
第四步、添加用户，点击添加按钮，把输入框中的数据作为一个对象 push 到数组userList，添加完之后，把userName, age清空，那么两个输入框的内容就会被清空
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="lib/bootstrap.min.css"/>
<script src="lib/jquery-1.7.2.js"></script>
<script src="lib/bootstrap.js"></script>
<script src="../js/vue.js"></script>
<script>
window.onload = function () {
var c = new Vue({
el: '#box',
data: {
userList: [],
userName : '',
age : ''
}
});
}
</script>
</head>
<body>
<div class="container" id="box">
<form role="form">
<div class="form-group">
<label for="username">用户名:</label>
<input type="text" id="username" v-model="userName" class="form-control" placeholder="输入用户名">
</div>
<div class="form-group">
<label for="age">年 龄:</label>
<input type="text" id="age" v-model="age" class="form-control" placeholder="输入年龄">
</div>
<div class="form-group">
<input type="button" value="添加" class="btn btn-primary">
<input type="button" value="重置" class="btn btn-danger">
</div>
</form>
<hr>
<table class="table table-bordered table-hover">
<caption class="h2 text-info">用户信息表</caption>
<tr class="text-danger">
<th class="text-center">序号</th>
<th class="text-center">名字</th>
<th class="text-center">年龄</th>
<th class="text-center">操作</th>
</tr>
<tr class="text-center" v-for="value in userList">
<td>{{$index+1}}</td>
<td>{{value.name}}</td>
<td>{{value.age}}</td>
<td>
<button class="btn btn-primary btn-sm" data-toggle="modal" data-target="#layer">删除</button>
</td>
</tr>
<tr>
<td colspan="4" class="text-right">
<button class="btn btn-danger btn-sm">删除全部</button>
</td>
</tr>
<tr>
<td colspan="4" class="text-center text-muted">
<p>暂无数据....</p>
</td>
</tr>
</table>
<!--模态框 弹出框-->
<div role="dialog" class="modal fade bs-example-modal-sm" id="layer">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">
<span>×</span>
</button>
<h4 class="modal-title">确认删除么?</h4>
</div>
<div class="modal-body text-right">
<button data-dismiss="modal" class="btn btn-primary btn-sm">取消</button>
<button data-dismiss="modal" class="btn btn-danger btn-sm">确认</button>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
第五步、结合数组的长度与v-show指令，实现提示信息的显示与隐藏
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="lib/bootstrap.min.css"/>
<script src="lib/jquery-1.7.2.js"></script>
<script src="lib/bootstrap.js"></script>
<script src="../js/vue.js"></script>
<script>
window.onload = function () {
var c = new Vue({
el: '#box',
data: {
userList: [],
userName : '',
age : ''
},
methods : {
addUser : function(){
this.userList.push({
name : this.userName,
age : this.age
});
this.userName = ''; //添加完用户之后，把输入框的值清除
this.age = '';
}
}
});
}
</script>
</head>
<body>
<div class="container" id="box">
<form role="form">
<div class="form-group">
<label for="username">用户名:</label>
<input type="text" id="username" v-model="userName" class="form-control" placeholder="输入用户名">
</div>
<div class="form-group">
<label for="age">年 龄:</label>
<input type="text" id="age" v-model="age" class="form-control" placeholder="输入年龄">
</div>
<div class="form-group">
<input type="button" v-on:click="addUser();" value="添加" class="btn btn-primary">
<input type="button" value="重置" class="btn btn-danger">
</div>
</form>
<hr>
<table class="table table-bordered table-hover">
<caption class="h2 text-info">用户信息表</caption>
<tr class="text-danger">
<th class="text-center">序号</th>
<th class="text-center">名字</th>
<th class="text-center">年龄</th>
<th class="text-center">操作</th>
</tr>
<tr class="text-center" v-for="value in userList">
<td>{{$index+1}}</td>
<td>{{value.name}}</td>
<td>{{value.age}}</td>
<td>
<button class="btn btn-primary btn-sm" data-toggle="modal" data-target="#layer">删除</button>
</td>
</tr>
<tr v-show="userList.length!=0">
<td colspan="4" class="text-right">
<button class="btn btn-danger btn-sm">删除全部</button>
</td>
</tr>
<tr v-show="userList.length==0">
<td colspan="4" class="text-center text-muted">
<p>暂无数据....</p>
</td>
</tr>
</table>
<!--模态框 弹出框-->
<div role="dialog" class="modal fade bs-example-modal-sm" id="layer">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">
<span>×</span>
</button>
<h4 class="modal-title">确认删除么?</h4>
</div>
<div class="modal-body text-right">
<button data-dismiss="modal" class="btn btn-primary btn-sm">取消</button>
<button data-dismiss="modal" class="btn btn-danger btn-sm">确认</button>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
第六步、实现删除某行数据
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="lib/bootstrap.min.css"/>
<script src="lib/jquery-1.7.2.js"></script>
<script src="lib/bootstrap.js"></script>
<script src="../js/vue.js"></script>
<script>
window.onload = function () {
var c = new Vue({
el: '#box',
data: {
userList: [],
userName : '',
age : '',
curIndex : -10
},
methods : {
addUser : function(){
this.userList.push({
name : this.userName,
age : this.age
});
this.userName = ''; //添加完用户之后，把输入框的值清除
this.age = '';
},
deleteRow : function( n ){
this.userList.splice( n, 1 );
}
}
});
}
</script>
</head>
<body>
<div class="container" id="box">
<form role="form">
<div class="form-group">
<label for="username">用户名:</label>
<input type="text" id="username" v-model="userName" class="form-control" placeholder="输入用户名">
</div>
<div class="form-group">
<label for="age">年 龄:</label>
<input type="text" id="age" v-model="age" class="form-control" placeholder="输入年龄">
</div>
<div class="form-group">
<input type="button" v-on:click="addUser();" value="添加" class="btn btn-primary">
<input type="button" value="重置" class="btn btn-danger">
</div>
</form>
<hr>
<table class="table table-bordered table-hover">
<caption class="h2 text-info">用户信息表</caption>
<tr class="text-danger">
<th class="text-center">序号</th>
<th class="text-center">名字</th>
<th class="text-center">年龄</th>
<th class="text-center">操作</th>
</tr>
<tr class="text-center" v-for="value in userList">
<td>{{$index+1}}</td>
<td>{{value.name}}</td>
<td>{{value.age}}</td>
<td>
<button class="btn btn-primary btn-sm" data-toggle="modal" data-target="#layer" v-on:click="curIndex=$index">删除</button>
</td>
</tr>
<tr v-show="userList.length!=0">
<td colspan="4" class="text-right">
<button class="btn btn-danger btn-sm">删除全部</button>
</td>
</tr>
<tr v-show="userList.length==0">
<td colspan="4" class="text-center text-muted">
<p>暂无数据....</p>
</td>
</tr>
</table>
<!--模态框 弹出框-->
<div role="dialog" class="modal fade bs-example-modal-sm" id="layer">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">
<span>×</span>
</button>
<h4 class="modal-title">确认删除么?</h4>
</div>
<div class="modal-body text-right">
<button data-dismiss="modal" class="btn btn-primary btn-sm">取消</button>
<button data-dismiss="modal" class="btn btn-danger btn-sm" v-on:click="deleteRow(curIndex);">确认</button>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
第七步、实现删除全部行
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="lib/bootstrap.min.css"/>
<script src="lib/jquery-1.7.2.js"></script>
<script src="lib/bootstrap.js"></script>
<script src="../js/vue.js"></script>
<script>
window.onload = function () {
var c = new Vue({
el: '#box',
data: {
userList: [],
userName: '',
age: '',
curIndex: -10
},
methods: {
addUser: function () {
this.userList.push({
name: this.userName,
age: this.age
});
this.userName = ''; //添加完用户之后，把输入框的值清除
this.age = '';
},
deleteRow: function (n) {
if (n == -1) { //当n=-1的时候,清空数组，就是删除全部
this.userList = [];
} else {
this.userList.splice(n, 1);
}
}
}
});
}
</script>
</head>
<body>
<div class="container" id="box">
<form role="form">
<div class="form-group">
<label for="username">用户名:</label>
<input type="text" id="username" v-model="userName" class="form-control" placeholder="输入用户名">
</div>
<div class="form-group">
<label for="age">年 龄:</label>
<input type="text" id="age" v-model="age" class="form-control" placeholder="输入年龄">
</div>
<div class="form-group">
<input type="button" v-on:click="addUser();" value="添加" class="btn btn-primary">
<input type="button" value="重置" class="btn btn-danger">
</div>
</form>
<hr>
<table class="table table-bordered table-hover">
<caption class="h2 text-info">用户信息表</caption>
<tr class="text-danger">
<th class="text-center">序号</th>
<th class="text-center">名字</th>
<th class="text-center">年龄</th>
<th class="text-center">操作</th>
</tr>
<tr class="text-center" v-for="value in userList">
<td>{{$index+1}}</td>
<td>{{value.name}}</td>
<td>{{value.age}}</td>
<td>
<button class="btn btn-primary btn-sm" data-toggle="modal" data-target="#layer"
v-on:click="curIndex=$index">删除
</button>
</td>
</tr>
<tr v-show="userList.length!=0">
<td colspan="4" class="text-right">
<button class="btn btn-danger btn-sm" v-on:click="curIndex=-1" data-toggle="modal" data-target="#layer">
删除全部
</button>
</td>
</tr>
<tr v-show="userList.length==0">
<td colspan="4" class="text-center text-muted">
<p>暂无数据....</p>
</td>
</tr>
</table>
<!--模态框 弹出框-->
<div role="dialog" class="modal fade bs-example-modal-sm" id="layer">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">
<span>×</span>
</button>
<h4 class="modal-title">确认删除么?</h4>
</div>
<div class="modal-body text-right">
<button data-dismiss="modal" class="btn btn-primary btn-sm">取消</button>
<button data-dismiss="modal" class="btn btn-danger btn-sm" v-on:click="deleteRow(curIndex);">确认
</button>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
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