md-input-container 是一个Angular指令，是一个容器组件，包含任何< input> 或< textarea> 作为孩子的元素.它还支持使用标准ng-messages指令进行错误处理，并使用ngEnter/ngLeave事件或ngShow/ngHide事件为消息设置动画.
下表列出了 md-input-container 的不同属性的参数和描述.
| Sr.No | 参数&说明 |
|---|---|
| 1 | md-maxlength 此输入中允许的最大字符数.如果指定了此项，则输入下方将显示一个字符计数器. md-maxlength的目的是显示最大长度计数器文本.如果您不想要计数器文本并且只需要"普通"验证，则可以使用"简单"ng-maxlength或maxlength属性. |
| 2 | aria-label 如果没有标签，则需要Aria-label.如果标签不存在，控制台中将记录一条警告消息. |
| 3 | 占位符 在标签不存在时使用aria-label的另一种方法.占位符文本将复制到aria-label属性. |
| 4 | md-no-autogrow 如果存在，textareas将不会自动增长. |
| 5 | md-检测隐藏 当存在时，textareas在被隐藏后显示时会正确调整大小.出于性能原因，默认情况下这是关闭的，因为它保证了每个摘要周期的重排. |
以下示例显示了md-input-container指令的使用以及输入的使用.
am_inputs. htm
<html lang = "en">
<head>
<link rel = "stylesheet"
href = "https://ajax.googleapis.com/ajax/libs/angular_material/1.0.0/angular-material.min.css">
<script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular-animate.min.js"></script>
<script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular-aria.min.js"></script>
<script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular-messages.min.js"></script>
<script src = "https://ajax.googleapis.com/ajax/libs/angular_material/1.0.0/angular-material.min.js"></script>
<link rel = "stylesheet" href = "https://fonts.googleapis.com/icon?family=Material+Icons">
<style>
</style>
<script language = "javascript">
angular
.module('firstApplication', ['ngMaterial'])
.controller('inputController', inputController);
function inputController ($scope) {
$scope.project = {
comments: 'Comments',
};
}
</script>
</head>
<body ng-app = "firstApplication">
<div id = "inputContainer" class = "inputDemo"
ng-controller = "inputController as ctrl" ng-cloak>
<md-content layout-padding>
<form name = "projectForm">
<md-input-container class = "md-block">
<label>User Name</label>
<input required name = "userName" ng-model = "project.userName">
<div ng-messages = "projectForm.userName.$error">
<div ng-message = "required">This is required.</div>
</div>
</md-input-container>
<md-input-container class = "md-block">
<label>Email</label>
<input required type = "email" name = "userEmail"
ng-model = "project.userEmail"
minlength = "10" maxlength = "100" ng-pattern = "/^.+@.+\..+$/" />
<div ng-messages = "projectForm.userEmail.$error" role = "alert">
<div ng-message-exp = "['required', 'minlength', 'maxlength',
'pattern']">
Your email must be between 10 and 100 characters long and should
be a valid email address.
</div>
</div>
</md-input-container>
<md-input-container class = "md-block">
<label>Comments</label>
<input md-maxlength = "300" required name = "comments"
ng-model = "project.comments">
<div ng-messages = "projectForm.comments.$error">
<div ng-message = "required">This is required.</div>
<div ng-message = "md-maxlength">The comments has to be less
than 300 characters long.</div>
</div>
</md-input-container>
</form>
</md-content>
</div>
</body>
</html>验证结果.
