php – Yii2：自定义表单标题

实际上我想改变Bold -Create City中的文字来创建自定义城市

为了实现这一点,我正在尝试这个代码,但我得到的错误就像 – 无法找到类别’City’的消息源.

例1

<?php
$this->title = Yii::t('City','Custom City');
?>

示例2-我没有收到任何错误,但表单标题也没有更改.

<?php
$this->title = 'Custom City';
?>

我在_form.php的整个代码下面：

<?php

use yiihelpersHtml;
use yiiwidgetsActiveForm;   

/* @var $this yiiwebView */
/* @var $model appmodelsCity */
/* @var $form yiiwidgetsActiveForm */

$this->title = ('Custom City');

$this->params['breadcrumbs'][] = $this->title;
?>



<div class="row">
    <div class="col-lg-3">

    </div>
    <div class="col-lg-5 col-lg-offset-1">
    <div class="city-form">

        <?php $form = ActiveForm::begin(); ?>

        <?= $form->field($model,'state_id')->DropDownList(ArrayHelper::map(State::find()->all(),'id','state_name' ),[ 'prompt' => 'Please Select' ])?>

        <?= $form->field($model,'city_name')->textInput() ?>

        <div class="form-group">
            <?= Html::submitButton($model->isNewRecord ? 'Create' : 'Update',['class' => $model->isNewRecord ? 'btn btn-success' : 'btn btn-primary']) ?>
        </div>

        <?php ActiveForm::end(); ?>

    </div>