将参数传递给Angular ng-include [英] Pass parameter to Angular ng-include

问题描述

我正在尝试显示元素的二叉树，并使用ng-include递归地进行遍历.

I am trying to display a binary tree of elements, which I go through recursively with ng-include.

ng-init="item = item.left"和ng-repeat="item in item.left"有什么区别? 在此示例中，它的行为完全相同，但是我在项目中使用了类似的代码，因此它的行为有所不同.我想是因为角度范围. 也许我不应该使用ng-if，请向我解释如何做得更好.

What is the difference between ng-init="item = item.left" and ng-repeat="item in item.left" ? In this example it behaves exactly the same, but I use similiar code in a project and there it behaves differently. I suppose it's because of Angular scopes. Maybe I shouldn't use ng-if, please explain me how to do it better.

pane.html是:

The pane.html is:

<div ng-if="!isArray(item.left)">
    <div ng-repeat="item in [item.left]" ng-include="'Views/pane.html'">
    </div>
</div>
<div ng-if="isArray(item.left)">
    {{item.left[0]}}
</div>
<div ng-if="!isArray(item.right)">
    <div ng-repeat="item in [item.right]" ng-include="'Views/pane.html'">
    </div>
</div>
<div ng-if="isArray(item.right)">
    {{item.right[0]}}
</div>

<div ng-if="!isArray(item.left)">
    <div ng-init = "item = item.left" ng-include="'Views/pane.html'">
    </div>
</div>
<div ng-if="isArray(item.left)">
    {{item.left[0]}}
</div>
<div ng-if="!isArray(item.right)">
    <div ng-init="item = item.right" ng-include="'Views/pane.html'">
    </div>
</div>
<div ng-if="isArray(item.right)">
    {{item.right[0]}}
</div>

控制器为:

var app = angular.module('mycontrollers', []);

app.controller('MainCtrl', function ($scope) {

    $scope.tree = {
        left: {
            left: ["leftleft"],
            right: {
                left: ["leftrightleft"],
                right: ["leftrightright"]
            }
        },
        right: {
            left: ["rightleft"],
            right: ["rightright"]
        }
    };

    $scope.isArray = function (item) {
        return Array.isArray(item);
    }
});

首先，我遇到一个问题，即指令ng-repeat的优先级高于ng-if.我试图将它们合并，但失败了.海事组织(IMO)奇怪的是ng-repeat主导ng-if.

First I run into the problem that the directive ng-repeat has a greater priority than ng-if. I tried to combine them, which failed. IMO it's strange that ng-repeat dominates ng-if.

推荐答案

将参数传递给Angular ng-include

Pass parameter to Angular ng-include

您不需要.所有ng-include的源都具有相同的控制器.因此，每个视图看到的都是相同的数据.

You don't need that. all ng-include's sources have the same controller. So each view sees the same data.

ng-init ="item = item.left"和ng-repeat ="item.left"中的项目有什么区别

What is the difference between ng-init="item = item.left" and ng-repeat="item in item.left"

[ 1 ]

ng-init="item = item.left"的意思是-创建名为item.left的名为item的新实例.换句话说，您可以通过编写控制器来实现相同目的:

ng-init="item = item.left" means - creating new instance named item that equals to item.left. In other words you achieve the same by writing in controller:

$scope.item = $scope.item.left

---

[2]

ng-repeat="item in item.left"表示基于item.left数组创建范围的列表.您应该知道ng-repeat中的每个项目都有其专用范围

ng-repeat="item in item.left" means create list of scopes based on item.left array. You should know that each item in ng-repeat has its private scope

我正在尝试显示元素的二叉树，并使用ng-include递归地进行遍历.

I am trying to display a binary tree of elements, which I go through recursively with ng-include.

我在过去的答案中发布了如何使用ng-include显示树.

I posted in the past answer how to display tree by using ng-include.

这可能会有所帮助: 如何显示可折叠树

It might helpful: how-do-display-a-collapsible-tree

此处创建的主要部分是 Node ，其中id由<scipt>标签包裹并使用ng-repeat:

The main part here that you create Node with id wrapped by <scipt> tag and use ng-repeat:

  <script type="text/ng-template"  id="tree_item_renderer">
        <ul class="some" ng-show="data.show"> 
          <li ng-repeat="data in data.nodes" class="parent_li"  ng-include="'tree_item_renderer'" tree-node></li>
        </ul>
  </script>


<ul>
  <li ng-repeat="data in displayTree"  ng-include="'tree_item_renderer'"></li>

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