.controller('MainController', function($scope, $http, $ionicModal, $timeout) {
    var post = {};
    $http.get("data/themeData.json")
      .success(function(response) {
        $scope.themeData = response.themeData;
      });
    $ionicModal.fromTemplateUrl('templates/post.html', {
      scope: $scope
    }).then(function(modal) {
      $scope.modal = modal;
    });
    $scope.postShow = function() {
      post = $scope.post = {};
      $scope.modal.show();
    };
    $scope.cancelPost = function() {
      $scope.modal.hide();
    };
    $scope.doPost = function() {
      console.log('doPost-----');
      console.log(post);
      $timeout(function() {
        $scope.cancelPost();
      }, 1000);
    };
  })

<ion-modal-view>
<form name="post_form">
 <ion-header-bar>
   <button class="button button-icon icon ion-ios-arrow-back" ng-click="cancelPost()"></button>
   <h1 class="title">发帖</h1>
   <button class="button button-icon icon ion-forward" ng-disabled="post_form.$invalid" ng-click="doPost()"></button>
 </ion-header-bar>
 <ion-content>
   <div class="list">
    <label class="item item-input myLabel">
     <input type="text" placeholder="标题" ng-model="post.title" required/>
    </label>
    <label class="item item-input myLabel2">
     <select class="mySelect col" ng-model="post.kmForumCategoryId" ng-options="theme.id as theme.name for theme in themeData" required>
　　　　<!-- 添加了id属性作为option的value -->
      <option value="">选择主题分类</option>
     </select>
    </label>
    <label class="item item-input myLabel">
     <textarea class="post_content" placeholder="内容" ng-model="post.content" required></textarea>
    </label>
   </div>
 </ion-content>
</form>
</ion-modal-view>

<select class="mySelect col ng-pristine ng-untouched ng-invalid ng-invalid-required" ng-model="post.kmForumCategoryId" ng-options="theme.id as theme.name for theme in themeData" required="">
　　<option value="">选择主题分类</option>
　　<option value="0" label="主题111">主题111</option>
　　<option value="1" label="主题222">主题222</option>
　　<option value="2" label="有没问题">有没问题</option>
　　<option value="3" label="测试112">测试112</option>
　　<option value="4" label="你好">你好</option>
　　<option value="5" label="主题">主题</option>
　　<option value="6" label="测试000">测试000</option>
</select>