Question

我使用类在我的AngularDart组件中使用Polymer iron-flex-layout。由于它会产生弃用警告，我认为会尝试推荐的替代方案：mixin's。它们不起作用。

目前，我在artist_component.dart中有这个导入：

import 'package:polymer_elements/iron_flex_layout.dart';

我也尝试将此添加到我的index.html

    <link rel="import" href="packages/polymer_elements/iron_flex_layout.html">

这与使用凉亭的文档中给出的示例不同。在我的artist_component.html中，我有：

<style is="custom-style">
  .container {
   @apply(--layout-horizontal);
  }
  .flexchild {
    @apply(--layout-flex-3);
  }
  .flexchild-2 {
    @apply(--layout-flex-9);
  }
</style>
<section class="container">
  <section class="flexchild gutter">
...

我已经尝试将导入放在index.html和我的主css文件中以及没有影响的样式。鉴于课程有效，你会认为mixim也是如此。

Answer 1

我一直在挖掘，我找到了答案。我还发现该方法已被弃用。我的pubspec定义了这些版本：

polymer: ^1.0.0-rc.17
polymer_elements: ^1.0.0-rc.8

我很确定解决方案是将这行代码添加到我的index.html：

<link rel="import" href="packages/polymer/polymer.html">

我不肯定这是唯一的要求是因为我一直在改变很多东西才能让它发挥作用。这是我完整的index.html：

<!DOCTYPE html>
<html>
<head>
<title>Jazz Cat</title>
<script>
  window.Polymer = window.Polymer || {};
  window.Polymer.dom = 'shadow';
</script>

<!-- For testing using pub serve directly use: -->
<base href="/">
<!-- For testing in WebStorm use: -->
<!-- <base href="/dart/web/"> -->

<link rel="import" href="packages/polymer/polymer.html">
<link rel="import" href="packages/polymer_elements/iron_flex_layout.html">
<link href="master.css" rel="stylesheet" type="text/css" />
<style is="custom-style">
  .container {
    @apply(--layout-horizontal);
  }
  .element-index {
    @apply(--layout-flex-3);
  }
  .element-body {
    @apply(--layout-flex-9);
  }
  .element-main {
    @apply(--layout-flex-7);
  }
  .element-sidebar {
    @apply(--layout-flex-2);
  }
</style>
<script defer src="main.dart" type="application/dart"></script>
<script defer src="packages/browser/dart.js"></script>
</head>
<my-app>Loading...</my-app>
</html>

现在我开始工作，我会将我的样式移到一个单独的文件中。这是我使用mixin类的文件之一：

<section class="container">
<section class="element-index">
<h1>{{title}}</h1>
  <paper-listbox class="scroll-list" (click)="onScroll()">
    <paper-item class="item-height" *ngFor="let artist of artists" [class.selected]="artist == selectedArtist" (click)="onSelect(artist)">
      {{artist.first_name}} {{artist.last_name}}
    </paper-item>
  </paper-listbox>
<paper-button (click)="gotoDetail()">Detail</paper-button>
<!--<paper-icon-button icon="refresh" (click)="gotoDetail()"></paper-icon-button>-->
  <!--<button (click)="gotoDetail()">View Details</button>-->
</section>
<section class="element-body">
<div *ngIf="selectedArtist != null">
  <h2>{{selectedArtist.first_name}} {{selectedArtist.last_name}}</h2>
  <!--<section class="layout horizontal">-->
  <section class="container">
    <section class="element-main">
      <!--<dl class="justified">
        <dt>Instrument:</dt><dd>{{ selectedArtist.primary_instrument }} </dd>
        <dt>Other:</dt><dd>{{ selectedArtist.other_instruments }}</dd>
        <dt>Birth:</dt><dd>{{ selectedArtist.birth_year }}</dd>
        <dt>Death:</dt><dd>{{ selectedArtist.death_year }}</dd>
      </dl>-->
      <h3>Notes</h3>
      <p>{{ selectedArtist.notes }}</p>
      <h3>Recordings</h3>
      <table class="index">
        <th>Date</th>
        <th>Title</th>
        <th>Leader</th>
        <tr *ngFor="let credit of artist_credits" >
          <td class="tableDate">{{ credit.recording_date | date:'d MMM yyyy' }}</td>
          <td>{{ credit.title }}</td>
          <td>{{ credit.first_name }} {{ credit.last_name}}</td>
        </tr>
      </table>
    </section>
    <section class="element-sidebar">
      <dl class="narrow-list">
        <dt>Instrument</dt><dd>{{ selectedArtist.primary_instrument }} </dd>
        <dt>Other</dt><dd>{{ selectedArtist.other_instruments }}</dd>
        <dt>Birth</dt><dd>{{ selectedArtist.birth_year }}</dd>
        <dt>Death</dt><dd>{{ selectedArtist.death_year }}</dd>
      </dl>
    </section>
  </section>
</div>
</section>
</section>

根据this question的答案，已为聚合物1.1创建了一种新方法，并且已弃用此方法。

聚合物铁Flex Mixin不起作用，但是类

1 个答案: