Yii2 验证码

没有用默认的layout  验证码点击不会改变 下面是静态页面代码

 <div class="col-sm-12 login">
                 <div class="row">
                     <div class="col-sm-6 col-md-offset-3">
                         <?php $form = ActiveForm::begin([
                             'fieldConfig' => [
                                 'template' => '<div class="form-group"><label for="inputPassword3" class="col-sm-4 control-label">{label}：</label> <div class="col-sm-8 b-margin10">{input}<label class="xz_b">{error}</label></div></div>',
                                 'inputOptions' => ['class' => 'form-control'],
                                 'labelOptions' => ['class' => ''],
                             ],
                             'options' => ['class' => 'form-horizontal']
                         ]); ?>
                         <?= $form->field($model, 'username')->textInput(['placeholder' => '6~8个字符，可使用字母、数字，需以字母开头。']) ?>
                         <?= $form->field($model, 'verifyCode')->widget(yii\captcha\Captcha::className(), [
                             'template' => '<div class="col-sm-9 padding0">{input}</div><div class="col-sm-3 "><label >{image}</label></div> ',
                             'imageOptions' => ['id' => 'checkpic', 'title' => '点击换图', 'style' => 'cursor:pointer', 'class' => 'yzm', 'onclick' => 'changing();'],
                         ]) ?>

                         <?= $form->field($model, 'password')->passwordInput(['placeholder' => '6~16个字符，区分大小写。']) ?>
                         <?= $form->field($model, 'replace_password')->passwordInput() ?>
                         <div class="row text-center">
                             <div class="col-lg-12">
                                 <button type="submit" class="btn btn-primary btn-lg btn-neir">下一步</button>
                             </div>
                         </div>
                         <?php $form = ActiveForm::end() ?>
                     </div>
                 </div>
             </div>

在改页面中添加 一下js代码即可解决问题：

 <script type="text/javascript">
     //更改或者重新加载验证码
     function changing() {
         $.ajax({
             url: "/site/captcha?refresh",
             dataType: 'json',
             cache: false,
             success: function(data) {
                 $("#checkpic").attr('src', data['url']);
             }
         });
     }
 </script>