通常我使用 formName.inputName.$invalid 来显示这样的错误信息输入:
<input name="myInput" minlength="3" />
<span ng-show="myForm.myInput.$invalid">too short</span>
这不是问题。
但是当我尝试验证复选框时，似乎很难，最后有代码段。
我想要用户至少选中一个复选框的效果，否则你会收到警告消息。
我怎样才能以最简单的方式做到这一点？
// app.js
var formApp = angular.module('formApp', [])
.controller('formController', function($scope) {
// we will store our form data in this object
$scope.formData = {};
$scope.formData.favoriteColors = [{
'id':'1',
'name':'red'
},{
'id':'2',
'name':'green'
},{
'id':'3',
'name':'blue'
}];
$scope.cList = [];
$scope.checkList = function(index){
if($scope.myForm.favoriteColors.$pristine){
$scope.cList.push($scope.formData.favoriteColors[index]);
}
else{
angular.forEach($scope.formData.favoriteColors,function(value,key){
if(value.checked){
$scope.cList.push(value.id);
}
});
}
console.log('cList:%o',$scope.cList);
};
});
<!-- index.html -->
<!DOCTYPE html>
<html>
<head>
<!-- CSS -->
<!-- load up bootstrap and add some spacing -->
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.20/angular.min.js"></script>
<link href="http://cdn.bootcss.com/bootstrap/3.3.2/css/bootstrap.min.css" rel="stylesheet"/>
<style>
body { padding-top:50px; }
form { margin-bottom:50px; }
</style>
<!-- JS -->
<!-- load up angular and our custom script -->
<script src="lib/angular/angular.min.js"></script>
<script src="app.js"></script>
</head>
<!-- apply our angular app and controller -->
<body ng-app="formApp" ng-controller="formController">
<div class="col-xs-12 col-sm-10 col-sm-offset-1">
<h2>Angular Checkboxes and Radio Buttons</h2>
<form name="myForm">
<!-- NAME INPUT -->
<div class="form-group">
<label>Name</label>
<input type="text" class="form-control" name="name" ng-model="formData.name">
</div>
<!-- MULTIPLE CHECKBOXES -->
<label>Favorite Colors</label>
<div class="form-group">
<label class="checkbox-inline" ng-repeat="color in formData.favoriteColors">
<input type="checkbox" name="favoriteColors" ng-model="color.checked" ng-click="checkList($index)" required>{{color.name}}
</label>
<span class="danger" ng-show="myForm.favoriteColors.$invalid">Please check one color at least</span>
</div>
<!-- SUBMIT BUTTON (DOESNT DO ANYTHING) -->
<button type="submit" class="btn btn-danger btn-lg">Send Away!</button>
</form>
<!-- SHOW OFF OUR FORMDATA OBJECT -->
<h2>Sample Form Object</h2>
<pre>
dirty:{{ myForm.favoriteColors.$dirty }}
pristine:{{ myForm.favoriteColors.$pristine }}
valid:{{ myForm.favoriteColors.$valid }}
invalid:{{ myForm.favoriteColors.$invalid }}
error:{{ myForm.favoriteColors.$error }}
</pre>
</div>
</body>
</html>
最佳答案
我使用计数函数来更新选中复选框的数量。
关于javascript - 我如何验证angularjs中的复选框？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29158394/