Question

AngularDart中角度组件的AppLayout抛出错误，我无法识别要运行的项目中缺少的内容。请帮助我解释在项目中简单地运行布局需要什么。

Serving angular_dart_app_layout web on http://localhost:8080
[BuilderTransformer: Instance of 'LibraryBuilder' on 
angular_dart_app_layout|primary]:
Error running TemplateGenerator for 
angular_dart_app_layout|lib/app_component.dart.
Error: FormatException: Illegal scheme character (at character 4)


app_component.csspackage:angular_components/src/components/app_layout/layou...
   ^

Stack Trace:
#0      _Uri._fail (dart:core/uri.dart:1597)
#1      _Uri._makeScheme (dart:core/uri.dart:2059)
#2      new _Uri.notSimple (dart:core/uri.dart:1437)
#3      Uri.parse (dart:core/uri.dart:1012)
#4      NgAssetReader._normalize 
(package:angular_compiler/src/asset.dart:29)
#5      NgAssetReader.resolveUrl (package:angular_compiler/src/asset.dart:23)
#6      DirectiveNormalizer.normalizeLoadedTemplate.<anonymous closure> (package:angular/src/compiler/directive_normalizer.dart:106)
#7      MappedListIterable.elementAt (dart:_internal/iterable.dart:413)
#8      ListIterable.toList (dart:_internal/iterable.dart:218)
#9      DirectiveNormalizer.normalizeLoadedTemplate (package:angular/src/compiler/directive_normalizer.dart:107)
#10     DirectiveNormalizer.normalizeTemplate.<anonymous closure> (package:angular/src/compiler/directive_normalizer.dart:75)
#11     _rootRunUnary (dart:async/zone.dart:1128)
#12     _CustomZone.runUnary (dart:async/zone.dart:1012)
#13     _FutureListener.handleValue (dart:async/future_impl.dart:129)
#14     _Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:636)
#15     _Future._propagateToListeners (dart:async/future_impl.dart:665)
#16     _Future._completeWithValue (dart:async/future_impl.dart:478)
#17     _Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:510)
#18     _rootRun (dart:async/zone.dart:1120)
#19     _CustomZone.run (dart:async/zone.dart:1001)
#20     _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:928)
#21     _microtaskLoop (dart:async/schedule_microtask.dart:41)
#22     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50)
#23     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:99)
#24     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:152)
Build completed with 1 errors.

app_component.dart

import 'package:angular/angular.dart';
import 'package:angular_components/angular_components.dart';
import 'src/todo_list/todo_list_component.dart';

@Component(
  selector: 'my-app',
  styleUrls: const [
     'app_component.css'
     'package:angular_components/src/components/app_layout/layout.scss.css',
  ],
  templateUrl: 'app_component.html',
  directives: const [
    materialDirectives,
    DeferredContentDirective,
    MaterialButtonComponent,
    MaterialIconComponent,
    MaterialTemporaryDrawerComponent,
    MaterialToggleComponent,
    TodoListComponent
  ],
  providers: const [materialProviders],
)
class AppComponent {
  bool end = false;
  bool overlay = false;
 }

app_component.html

<material-drawer temporary #drawer="drawer"
                 [attr.end]="end ? '' : null"
                 [attr.overlay]="overlay ? '' : null">
    <div *deferredContent>
        Here is some drawer content.
    </div>
</material-drawer>
<material-content>
    <header class="material-header shadow">
        <div class="material-header-row">
            <material-button class="material-drawer-button" icon (trigger)="drawer.toggle()">
                <material-icon icon="menu"></material-icon>
            </material-button>
            <span class="material-header-title">Mobile Layout</span>
            <div class="material-spacer"></div>
            <nav class="material-navigation">
                <a href="#AppLayout">Link 1</a>
            </nav>
            <nav class="material-navigation">
                <a href="#AppLayout">Link 2</a>
            </nav>
            <nav class="material-navigation">
                <a href="#AppLayout">Link 3</a>
            </nav>
        </div>
    </header>
    <div>
    <h1>My First AngularDart App</h1>

    <todo-list></todo-list>

    Lorem ipsum dolor sit amet, ad erat postea ullamcorper nec, veri veniam quo
    et. Diam phaedrum ei mea, quaeque voluptaria efficiantur duo no. Eu adhuc
    veritus civibus nec, sumo invidunt mel id, in vim dictas detraxit. Per an
    legere iriure blandit. Veri iisque accusamus an pri.
</div>
<div class="controls">
    <h3>Options</h3>

    <material-toggle [(checked)]="end" label="end">
    </material-toggle>

    <material-toggle [(checked)]="overlay" label="overlay">
    </material-toggle>
</div>

Answer 1

缺少逗号

 styleUrls: const [
     'app_component.css', // <<<=== added ,
     'package:angular_components/src/components/app_layout/layout.scss.css',
  ],

Dart会自动连接连续的字符串。

有一个linter规则来防止这个错误

如果你添加

linter:
  rules:
    - no_adjacent_strings_in_list

到项目目录中的analysis_options.yaml，分析仪会发出警告。另外，运行dartformat通常也会显示问题。

应用带角度飞镖的角度分量布局会产生错误

1 个答案: