angular实现form验证实例代码

2019-11-19 17:54:50

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先上效果页面：

其中几个知识点

1、angularJs提供了几个新的type类型：

type="password"type="email"type="number"type="url"

2、几个参数含义

ng-required //是否必填，true/false

ng-minlength //最小长度，数字

ng-maxlength //最大长度，数字

min //最小数字，数字，仅在type="number"下

max //最小数字，数字，仅在type="number"

3、几个form控制变量，先来一段代码

<form role="form" name="myform" > <div class="form-group" > <label class="col-sm-2">用户名</label> <div class="col-sm-8">   <input type="text" name="username" class="form-control" placeholder="请输入用户名"></div> </div></form>

formName.inputFieldName.$pristine   //字段是否未更改,对应上面的html代码即为 myform.username.$pristineformName.inputFieldName.$dirty   //字段是否更改,对应上面的html代码即为 myform.username.$dirtyformName.inputFieldName.$valid   //字段有效,对应上面的html代码即为 myform.username.$validformName.inputFieldName.$invalid   //字段无效,对应上面的html代码即为 myform.username.$invalidformName.inputFieldName.$error   //字段错误信息，使用频率比较高,对应上面的html代码即为 myform.username.$error

4、下面直接上代码，首先是html代码，使用了bootstrap.css样式，在结尾引入了angular

<!DOCTYPE html><html><head> <title>form验证</title> <link rel="stylesheet" type="text/css" href="style/bootstrap.css"></head><body ng-app="formModule"><div style="margin-top: 60px;"> <form role="form" name="myform" class="form-horizontal container" ng-controller="formctrl"> <!-- 用户名 --> <div class="form-group" ng-class="{'has-error':myform.username.$dirty && myform.username.$invalid}"> <label class="col-sm-2">用户名</label> <div class="col-sm-8">   <input type="text" name="username" ng-minlength="5" ng-maxlength="10" ng-required="true" ng-model="data.username" class="form-control" placeholder="请输入用户名"></div> <div class="col-sm-2 text-danger" ng-show="myform.username.$error.minlength">用户名必须大于5位</div> <div class="col-sm-2" ng-show="myform.username.$error.maxlength">用户名必须小于于10位</div> </div><!-- 密码 --><div class="form-group" ng-class="{'has-error':myform.password.$dirty&&myform.password.$invalid}"> <label class="col-sm-2">密 码</label> <div class="col-sm-8">   <input type="password" name="password" ng-minlength="10" ng-required="true" ng-model="data.password" class="form-control" placeholder="请输入密码"></div> <div class="col-sm-2 text-danger" ng-show="myform.password.$error.minlength">密码必须大于10位</div> </div> <!-- 确认密码 --> <div class="form-group" ng-class="{'has-error':myform.passwordconfirm.$dirty&&myform.passwordconfirm.$invalid}"> <label class="col-sm-2">确认密码</label> <div class="col-sm-8">   <input type="password" name="passwordconfirm" ng-required="true" ng-model="data.passwordconfirm" class="form-control" placeholder="请输入确认密码"></div> <div class="col-sm-2 text-danger" ng-show="data.passwordconfirm!=data.password&&myform.password.$dirty&&myform.passwordconfirm.$dirty">两次密码不一致</div> </div> <!-- 邮箱 --> <div class="form-group" ng-class="{'has-error':myform.email.$dirty&&myform.email.$invalid}"> <label class="col-sm-2">邮 箱</label> <div class="col-sm-8">   <input type="email" name="email" ng-required="true" ng-model="data.email" class="form-control" placeholder="请输入邮箱地址"></div> <div class="col-sm-2 text-danger" ng-show="myform.email.$error.email">请输入正确邮箱地址</div> </div> <!-- 博客 --> <div class="form-group" ng-class="{'has-error':myform.age.$dirty&&myform.age.$invalid}"> <label class="col-sm-2">年 龄</label> <div class="col-sm-8">   <input type="number" name="age" ng-required="true" min="10" max="99" ng-model="data.age" class="form-control" placeholder="请输入您的年龄"></div> <div class="col-sm-2 text-danger" ng-show="myform.age.$error.min&&myform.age$error.max">请输入正确年龄</div> </div> <!-- 年龄 --> <div class="form-group" ng-class="{'has-error':myform.blog.$dirty&&myform.blog.$invalid}"> <label class="col-sm-2">博 客</label> <div class="col-sm-8">   <input type="url" name="blog" ng-required="true" ng-model="data.blog" class="form-control" placeholder="请输入博客地址"></div> <div class="col-sm-2 text-danger" ng-show="myform.blog.$error.url">请输入正确博客地址</div> </div> <!-- 性别 --> <div class="form-group"> <label class="col-sm-2">性 别</label> <div class="col-sm-8">  <label class="radio-inline">   <input type="radio" value="1" ng-model="data.sex" name="sex"> 男</label> <label class="radio-inline">   <input type="radio" value="2" ng-model="data.sex" name="sex"> 女</label> </div> </div> <!-- 爱好 --> <div class="form-group"> <label class="col-sm-2">爱 好</label> <div class="col-sm-8"> <label ng-repeat="hoppy in hoppies" class="checkbox-inline">  <input type="checkbox" name="hoppy[]" ng-click="togglehoppy()" ng-model="hoppy.checked" >{{hoppy.name}} </label> </div> <div class="col-sm-2">{{data.Ahoppy.join('、')}}</div> </div> <!-- 地址 --> <div class="form-group">  <label class="col-sm-2">地 址</label>  <div class="col-sm-3">   <select class="form-control" ng-model="data.provinec" ng-options="x.id as x.name for x in cities | cityfilter:0"></select>  </div>  <div class="col-sm-3">   <select class="form-control" ng-show="data.provinec" ng-model="data.area" ng-options="x.id as x.name for x in cities | cityfilter:data.provinec"></select>  </div>  <div class="col-sm-3">   <select class="form-control" ng-show="data.area" ng-model="data.city" ng-options="x.id as x.name for x in cities | cityfilter:data.area"></select>  </div> </div> </form></div><script src="js/angular.js"></script><script src="js/app.js"></script></body></html>

下面为js代码（可能其中有些不妥之处，请指正，谢谢）

(function(window) { 'use strict'; var mymodule = angular.module('formModule', []); // 城市删选器 mymodule.filter('cityfilter',function(){  return function(data,parent){   var cityData=[];   angular.forEach(data, function(item, key){    if(item.parent==parent){     cityData.push(item);    }   });   return cityData;  } }); mymodule.controller('formctrl', ['$scope', function($scope) {  // 设定初始状态  $scope.data={   Ahoppy:[1,3]  }  // 爱好对象  $scope.hoppies = [  {id: 1,name: '玩游戏',checked: istrue(1)},  {id: 2,name: '吃饭',checked: false},   {id: 3,name: '睡觉',checked: false},   {id: 4,name: '玩游戏',checked: true}  ];  // 城市  $scope.cities=[   {name:'河南',parent:0,id:1},   {name:'郑州',parent:1,id:2},   {name:'郑东新区',parent:2,id:3},   {name:'金水区',parent:2,id:4},   {name:'二七区',parent:2,id:5},   {name:'信阳',parent:1,id:6},   {name:'商城',parent:6,id:7},   {name:'罗山',parent:6,id:8},   {name:'杭州',parent:0,id:9},   {name:'西湖区',parent:9,id:10},   {name:'余杭区',parent:9,id:11},   {name:'萧山区',parent:9,id:12},   {name:'上城区',parent:9,id:13},  ];    // 判断是否是选中状态  function istrue(id){   for(var i=0;i<$scope.data.Ahoppy.length;i++){    if($scope.data.Ahoppy[i]===id){     return true;    }   }   return false;  };  // 获取选中的爱好  $scope.togglehoppy = function() {   $scope.data.Ahoppy = [];   angular.forEach($scope.hoppies, function(item, key) {    if (item.checked == true) {     $scope.data.Ahoppy.push(item.id);    }   });  } }])})(window)

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