「Angular 2無法理解View#模板中的值」我無法獲取$ event的工作。例如:
import 'package:angular2/core.dart';
@Component(
selector: 'my-app',
template: '''
<h1>{{title}}</h1>
<button (click)="onTest($event)">testing</button>
''')
class AppComponent {
String title = 'Testing event';
onTest(event) {
print(event);
}
}
當我讓酒吧服務應用程序,我拋出一個編譯錯誤:
Build error:
Transform DirectiveProcessor on file_transfer|lib/app_component.dart threw error: Angular 2 could not understand the value in View#template.
'''
<h1>{{title}}</h1>
<button (click)="onTest($event)">testing</button...
package:angular2/src/transform/common/type_metadata_reader.dart 164:5 _expressionToString
package:angular2/src/transform/common/type_metadata_reader.dart 920:17 _CompileTemplateMetadataVisitor._populateTemplate
package:angular2/src/transform/common/type_metadata_reader.dart 901:9 _CompileTemplateMetadataVisitor.visitNamedExpression
package:analyzer/src/dart/ast/ast.dart 7455:15 NamedExpressionImpl.accept
...
我也試圖改變(點擊)到NG-點擊這裏$event in AngularDart 1.0 is not available anymore - what is the alternative?但沒」幫助。
我是新來的角,但以上的代碼應該工作吧?我查看了https://webdev.dartlang.org/angular/guide/template-syntax#!#event-binding以及使用$ event的英雄示例。看不出有什麼區別...
任何幫助表示讚賞。