输入（Inputs）

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2023-12-01

md-input-container是一个Angular指令，是一个容器组件，它包含任何《input》或《textarea》元素作为子元素。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事件设置消息动画。

属性 (Attributes)

下表列出了md-input-container的不同属性的参数和描述。

Sr.No	参数和描述
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 没有标签时需要咏叹调标签。如果标签不存在，将在控制台中记录警告消息。
3	placeholder 当标签不存在时使用aria-label的替代方法。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-detect-hidden 如果存在，textareas在被隐藏后显示时将适当调整大小。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。

例子 (Example)

以下示例显示了md-input-container指令的使用以及输入的用法。

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>