form表单验证概述
-
novalidate -- 屏蔽浏览器对表单的默认验证行为
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ng-model -- 绑定的数据
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ng-required -- 是否必填（可以控制是否是不填校验）
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required -- 必填（页面加载的时候就会自动验证 == true）
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ng-minlength -- 最小长度
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ng-maxlength -- 最大长度
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ng-pattern -- 匹配模式（正则）
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email -- 邮箱
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url -- 网址
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number -- 数字
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ng-change -- 值变化的回调
在表单中控制变量
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formName.inputField.$pristine 字段是否 未更改
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formName.inputField.$dirty 字段是否 更改
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formName.inputField.$valid 字段是否 有效
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formName.inputField.$invalid 字段是否 无效
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formName.inputField.$error 字段 错误信息
一些有用的CSS样式
- ng-valid //有效时的样式名
- ng-invalid //无效时的样式名
- ng-pristine //未更改的样式名
- ng-dirty //更改后的样式名
- ng-submitted //提交后的样式名.当用户试图提交表单时,可以在作用域中捕获到一个submitted值，然后对表单内容进行验证并显示错误信息
例如：
input.ng-invalid {
border: 1px solid red;
}
input.ng-valid {
border: 1px solid green;
}
form表单示例
<!--注册表单-->
<form class="zhucezhuti" id="myForm" role="form" ng-app="validate" ng-controller="validateCtrl" name="myForm" ng-submit="submitFormRegiter(myForm.$valid,'Regiter','/UserCenter/UpdateUserMessage')" novalidate>
<div class="mb-15 distab marcenter">
<input class="querenyong" type="email" id="UserEmail" data-value="1" name="UserEmail" placeholder="电子邮箱（用户名）" ng-model="UserEmail" required>
<span class="errorSty" ng-show="myForm.UserEmail.$dirty && myForm.UserEmail.$invalid && myForm.submitted">
<span ng-show="myForm.UserEmail.$error.required">*请输入邮箱</span>
<span ng-show="myForm.UserEmail.$error.email">*非法的邮箱地址。</span>
</span>
<span class="eSsuccess"></span>
</div>
<div class="mb-15 distab marcenter">
<div class="distab">
<input class="yanzhengma" type="number" id="emailYZM" name="yzm" placeholder="邮箱验证码" ng-model="yzm" required>
<input class="huoquyan" type="button" id="btn" value="获取邮箱验证码" ng-disabled="myForm.UserEmail.$invalid" onclick="time(this, 'SendMailMessage')" />
</div>
<span class="errorSty" ng-show="myForm.yzm.$dirty && myForm.yzm.$invalid && myForm.submitted">
<span ng-show="myForm.yzm.$error.required">*请输入验证码。</span>
<span ng-show="myForm.yzm.$error.number">*请输入正确的验证码。</span>
</span>
</div>
<div class="mb-15 distab marcenter">
<input class="querenyong" type="password" name="password" id="password" placeholder="密码（6-16个字符组成，区分大小写）" ng-model="password" ng-minlength="6" ng-maxlength="16" required>
<span class="errorSty" ng-show="myForm.password.$dirty && myForm.password.$invalid && myForm.submitted">
<span ng-show="myForm.password.$error.required">*密码是必须的。</span>
<span ng-show="myForm.password.$error.minlength">*密码不少于6位。</span>
<span ng-show="myForm.password.$error.maxlength">*密码不多于16位。</span>
</span>
</div>
<div class="mb-15 distab marcenter">
<input class="querenyong" type="password" name="confirmPassword" id="confirmPassword" placeholder="确认密码" ng-model="confirmPassword" pw-check="password" required>
<span class="errorSty" ng-show="myForm.confirmPassword.$dirty && myForm.confirmPassword.$invalid && myForm.submitted">
<span ng-show="myForm.confirmPassword.$error.required">*确认密码必填。</span>
<span ng-show="!myForm.confirmPassword.$pristine && myForm.confirmPassword.$invalid">*预设密码和确认密码不一致。</span>
</span>
</div>
<div class="tiaokuan mb-15">
<input class="fuxuan" ng-model="Iagree" type="checkbox" required> <font class="yuedu">请务必仔细阅读并同意 <a href="javascript:void(0)" onclick="showTanc('tanc','closethis')">网站使用条款</a> 和 <a href="javascript:void(0)" onclick="showTanc('tanc1','closethis')">电子金融交易使用条款 </a></font>
<span class="errorSty" ng-show="myForm.Iagree.$invalid && myForm.submitted">
<span ng-show="myForm.Iagree.$error.required">*您未同意条款。</span>
</span>
</div>
<input class="zhucedenglu" type="submit" value="注册" ng-disabled="!myForm.$dirty">
</form>
var app = angular.module('validate', []); app.controller('validateCtrl', function ($scope) { //仅当submitted设置为true时，容纳错误信息的div才会展示出来（即提交表单时显示相应错误信息） $scope.submitted = false; $scope.submitFormRegiter = function (isValid, action, nextaction) { if (!isValid) { // alert('验证失败'); $scope.myForm.submitted = true; } else { $.get(action, { UserEmail: $("#UserEmail").val(), messageCode: $("#messageCode").val(), UserPassWord: $("#password").val() }, function (result) { if (result.ReState == true) { window.location.href = nextaction; } else { alert("操作失败！");//完善信息页面没有返回提示信息。根据ReState显示相应提示 } }); } }; })
如果想保留实时错误提示的体验，可以在用户从某个输入字段失焦后提示错误信息:(添加一个自定义指令)
html代码 <input ng-class="{error: signup_form.name.$dirty && signup_form.name.$invalid}" type="text" placeholder="Name" name="name" ng-model="signup.name" ng-minlength="3" ng-maxlength="20" required ng-focus /> js代码 app.directive('ngFocus', [function() { var FOCUS_CLASS = "ng-focused"; return { restrict: 'A', require: 'ngModel', link: function(scope, element, attrs, ctrl) { ctrl.$focused = false; element.bind('focus', function(evt) { element.addClass(FOCUS_CLASS); scope.$apply(function() { ctrl.$focused = true; }); }).bind('blur', function(evt) { element.removeClass(FOCUS_CLASS); scope.$apply(function() { ctrl.$focused = false; }); }); } }; }]); ngFocus指令给表单输入字段的blur和focus添加了对应的行为，添加了一个名为ng-focused的类，并将$focused的值设置为true。接下来，可以根据表单是否具有焦点来展示独立的错误信息。如下所示： <div class="error" ng-show="signup_form.name.$dirty && signup_form.name.$invalid && !signup_form.name.$focused">
在发布的Angularjs 1.3中，Angularjs核心做了一个升级。它不再需要基于一个详细的表达式状态创建元素显示或隐藏。从1.3开始，Angularjs中新增了一个ngMessages指令
- 安装：<script type="text/javascript" src="bower_components/angular-messages/angular-messages.js"></script>
- 告诉angularjs将ngMessage作为应用程序的依赖模块引入：angular.module('myApp',['ngMessages']);
- 开始使用：<div class="error" ng-messages="signup_form.name.$error" ng-messages-include="templates/errors.html" ng-messages-multiple>
- 如果想要更新这个实现同时显示所有的错误，只需在ng-message指令旁使用ng-messages-multiple属性即可
- <!-- templates/errors.html内容 -->
- <div ng-message="required">This field is required</div>
- <div ng-message="minlength">The field must be at least 3 characters</div>
- <div ng-message="maxlength">The field cannot be longer than 20 characters</div>
- 为不同的字段自定义错误信息，可以在这个指令内简单地插入一个自定义错误信息。由于ngMessages涉及ngMessages容器中错误列表的顺序，可以通过在这个指令中列出自定义错误信息的方式覆盖它们
ngMessages示例
<form name="signup_form" novalidate ng-submit="signupForm()" ng-controller="signupController" ensure-unique="/api/checkUsername.json"> <label> Your name </label> <input type="text" placeholder="Username" name="username" ng-model="signup.username" ng-minlength=3 ng-maxlength=20 required /> <div class="error" ng-messages="signup_form.username.$error"> <div ng-message="required"> Make sure you enter your username </div> <div ng-message="checkingAvailability"> Checking... </div> <div ng-message="usernameAvailablity"> The username has already been taken. Please choose another </div> </div> <button type="submit"> Submit </button> </form> 在这个用法中，我们检查了错误信息的自定义属性。为了添加自定义错误信息，将会把他们应用到自定义ensureUnique指令的ngModel中 app.directive('ensureUnique', function($http) { return { require: 'ngModel', link: function(scope, ele, attrs, ctrl) { var url = attrs.ensureUnique; ctrl.$parsers.push(function(val) { if (!val || val.length === 0) { return; } ngModel.$setValidity('checkingAvailability', true); ngModel.$setValidity('usernameAvailablity', false); $http({ method: 'GET', url: url, params: { username: val } }).success(function() { ngModel .$setValidity('checkingAvailability', false); ngModel .$setValidity('usernameAvailablity', true); })['catch'](function() { ngModel .$setValidity('checkingAvailability', false); ngModel .$setValidity('usernameAvailablity', false); }); return val; }) } } });