>启用提交按钮
> erorr消息未显示在未触摸的表单上
>验证提交
>验证触摸元素

JSFiddle及以下的示例.

HTML：

<form name="myForm" ng-app="myApp" ng-controller="myController" class="container-fluid" ng-submit="myForm.$valid && submit()" novalidate>
  <div class="row">
    <div class="col-xs-8">
      <md-input-container md-is-error="myForm.name.$invalid && (myForm.$submitted || myForm.name.$dirty)">
        <label>Name</label>
        <input name="name" id="name" ng-model="obj.name" ng-required="true">
        <div ng-messages="myForm.name.$error" ng-if="myForm.$submitted || myForm.name.$touched">
          <div ng-message="required">Campaign Name is required.</div>
        </div>
      </md-input-container>
    </div>
    <div class="col-xs-8">
      <md-input-container  md-is-error="myForm.myselect.$invalid && (myForm.$submitted || myForm.myselect.$dirty)">
        <md-select name="myselect" id="myselect" placeholder="myselect" ng-model="obj.myselect" ng-required="true">
          <md-option ng-repeat="o in options" ng-value="o">{{o}}</md-option>
        </md-select>
        <div ng-messages="myForm.myselect.$error"  ng-if="myForm.$submitted || myForm.myselect.$touched">
          <div ng-message="required">myselect is required.</div>
        </div>
      </md-input-container>
    </div>
    <div class="col-xs-8">
      <md-input-container md-is-error="myForm.status.$invalid && (myForm.$submitted || myForm.status.$dirty)">
        <md-radio-group name="status" id="status" ng-model="obj.status" ng-required="true" class="">
          <md-radio-button ng-repeat="s in statuses" ng-value="s">{{s}}</md-radio-button>
        </md-radio-group>
        <div ng-messages="myForm.status.$error"  ng-if="myForm.$submitted || myForm.status.$touched">
          <div ng-message="required">status is required.</div>
        </div>
      </md-input-container>
    </div>
  </div>
  <md-button type="button" ng-click="reset()">RESET</md-button>
  <md-button type="submit" class="md-primary">SUBMIT</md-button>
</form>

JS：

var app = angular
  .module('myApp',['ngAnimate','ngAria','ngMaterial','ngMessages'])
  .controller('myController',function ($scope) {
    $scope.statuses = ['Planned','Confirmed','Cancelled'];
    $scope.options = ['Option 1','Option 2','Option 3','Option 4','...'];
    $scope.submit = function() {
      // submit code goes here
    };
    $scope.reset = function() {
      $scope.obj = {
        name: "",myselect: "",status: ""
      }
    };
    $scope.reset();
  });