视图和部分助手的示例

Question

我想深入了解视图助手和部分助手的主题。我尝试使用教程的树视图元素，效果很好。这将是尝试使用我认为的视图助手的一个很好的例子，但我迷路了。在我的理解中，递归部分应该是部分的？！ 有人可以解释如何在不同的辅助部分中拆分以下功能吗？在我看来如何实现？

    function treeview($array, $currentParent, $currLevel = 0, $prevLevel = -1) {

    foreach ($array as $categoryId => $category) {
        if ($currentParent == $category['parent_id']) {                       
            if ($currLevel > $prevLevel) echo " <ol class='tree'> "; 
                if ($currLevel == $prevLevel) echo " </li> ";
                echo '<li> <label for="subfolder2">'.$category['name'].'</label> <input type="checkbox" name="subfolder2"/>';
                if ($currLevel > $prevLevel) { $prevLevel = $currLevel; }
                $currLevel++; 
                treeview ($array, $categoryId, $currLevel, $prevLevel);
                $currLevel--;               
            }   
        }
        if ($currLevel == $prevLevel) echo " </li>  </ol> ";
}

我的观点如下：

require_once('../application/library/Treeview.php');
header("Content-Type: text/html; charset=utf-8");
echo $this->headLink()->prependStylesheet($this->baseUrl().'/css/tree.css'); 
$this->title = "Treeview Test";
$this->headTitle($this->titel);

$arrayCategories = array();
foreach($this->treeviewitems as $row) : 
    $arrayCategories[$row['id']] = array("parent_id" => $row['parent_id'], "name" =>$row['name']);

endforeach; 
treeview($arrayCategories, 0);

编辑，因为命名和路径问题：

新的viewhelper头：

class Application_View_Helper_Treeview extends Zend_View_Helper_Abstract
{
    public function treeview($array, $currentParent, $currLevel = 0, $prevLevel = -1) {

我的 application.ini 中的路径（如您所见，我之前尝试过命名）

resources.view.helperPath.Company_View_Helper = "Company/View/Helper"
resources.view.helperPath.Britta_View_Helper = "Britta/View/Helper"
resources.view.helperPath.Application_View_Helper = APPLICATION_PATH "/views/helpers"
resources.view.helperPath.Zend_Dojo_View_Helper = "Zend/Dojo/View/Helper"

现在是我保存 viewhelper 文件的路径：

名称：Treeview.php 路径：C:\wamp\www\riba_doc\application\views\helpers

错误：致命错误：在第 13 行调用 C:\wamp\www\riba_doc\application\views\scripts\treeview\index.phtml 中未定义的函数 treeview()

Answer 1

您可以通过更类似于 ZF1 的方式执行此操作，如下所示。

使用以下命令创建文件./library/My/View/Helper/Treeview.php：

<?php

class My_View_Helper_Treeview extends Zend_View_Helper_Abstract
{
    public function treeview($array, $currentParent, $currLevel = 0, $prevLevel = -1)
    {

        foreach ($array as $categoryId => $category) {
            if ($currentParent == $category['parent_id']) {
                if ($currLevel > $prevLevel) {
                    echo " <ol class='tree'> ";
                }
                if ($currLevel == $prevLevel) {
                    echo " </li> ";
                }
                echo '<li> <label for="subfolder2">' . $category['name'] . '</label> <input type="checkbox" name="subfolder2"/>';
                if ($currLevel > $prevLevel) {
                    $prevLevel = $currLevel;
                }
                $currLevel++;
                $this->treeview($array, $categoryId, $currLevel, $prevLevel);
                $currLevel--;
            }
        }
        if ($currLevel == $prevLevel) {
            echo " </li>  </ol> ";
        }
    }
}

接下来，我们需要告诉 ZF 如何找到我们的 Treeview 类并将其视为视图助手。这是通过将以下内容添加到我们的 ./application/config/application.ini 文件中来完成的：

resources.view.helperPath.My_View_Helper_ = "My/View/Helper/"

我们可能 - 不确定，哎呀！ - 还必须将My_ 命名空间添加到自动加载器：

autoloaderNameSpaces[] = "My_"

最后，我们可以在视图脚本中调用 Treeview 帮助器：

<? $this->treeview($arrayCategories, 0) ?>