使用 Polymer 1.0,我创建了一个纸抽屉面板布局。在抽屉里,我有一个使用纸质菜单的菜单,其中包含绑定在铁页上的纸质项目。我从Content Switcheroo with Core-Pages -- Polycasts #09 中获取了这个示例,并将其转换为使用 Polymer 1.0 元素。在下面的代码中,您可以看到我的注释部分,其中纸质项目是硬编码的。这工作正常。
我的下一步是尝试通过使用<template is="dom-repeat">
元素迭代任意菜单项数组来动态构建我的菜单。菜单正确呈现(我可以看到绑定到数组的所有菜单项),但我无法单击这些项目并且没有显示铁页。似乎用于 attr-for-selected 的 data-category 属性在内部不起作用<template is="dom-repeat">
。
我可以通过什么方式让它发挥作用?编辑:删除 attr-for-selected 属性并使用索引切换铁页工作,但在我的情况下依赖数组的索引不是一个选项。
我的 index.html 如下:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
<meta name="mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-capable" content="yes">
<title>My Test</title>
<script src="bower_components/webcomponentsjs/webcomponents-lite.min.js"></script>
<link rel="import" href="bower_components/polymer/polymer.html">
<link rel="import" href="bower_components/iron-icons/iron-icons.html">
<link rel="import" href="bower_components/iron-pages/iron-pages.html">
<link rel="import" href="bower_components/paper-drawer-panel/paper-drawer-panel.html">
<link rel="import" href="bower_components/paper-toolbar/paper-toolbar.html">
<link rel="import" href="bower_components/paper-header-panel/paper-header-panel.html">
<link rel="import" href="bower_components/paper-icon-button/paper-icon-button.html">
<link rel="import" href="bower_components/paper-item/paper-item.html">
<link rel="import" href="bower_components/paper-styles/paper-styles.html">
<link rel="import" href="bower_components/paper-menu/paper-menu.html">
<style>
</style>
</head>
<body>
<my-app></my-app>
<dom-module id="my-app">
<style>
</style>
<template>
<paper-drawer-panel>
<paper-header-panel drawer class="fit">
<paper-toolbar>
<div>Drawer</div>
</paper-toolbar>
<paper-menu class="content fit" selected="{{page}}" attr-for-selected="data-category">
<!-- This works -->
<!--
<paper-item data-category="item1" label="item1">
<span>John Smith</span>
</paper-item>
<paper-item data-category="item2" label="item2">
<span>Jane Doe</span>
</paper-item>
-->
<!-- This does not work -->
<template is="dom-repeat" items="{{names}}">
<paper-item data-category="{{item.itemNum}}" label="{{item.itemNum}}">
<span>{{item.first}}</span><span>{{item.last}}</span><span>{{item.itemNum}}</span>
</paper-item>
</template>
</paper-menu>
</paper-header-panel>
<paper-header-panel main class="fit">
<paper-toolbar>
<paper-icon-button icon="menu" paper-drawer-toggle></paper-icon-button>
<div class="flex">Main Content</div>
</paper-toolbar>
<iron-pages selected="{{page}}" attr-for-selected="data-category">
<section data-category="item1">
<h1>Item 1</h1>
<div>Item 1 content...</div>
</section>
<section data-category="item2">
<h1>Item 2</h1>
<div>Item 2 content...</div>
</section>
</iron-pages>
</paper-header-panel>
</paper-drawer-panel>
</template>
<script>
Polymer({
is: "my-app",
ready: function() {
this.names = [{itemNum: "item1", first: "John", last: "Smith"}, {itemNum: "item2", first: "Jane", last: "Doe"}];
}
});
</script>
</dom-module>
</body>
</html>