异常：无法绑定到“ng for”，因为它不是已知的本机属性

Question

我做错了什么？

import {bootstrap, Component} from 'angular2/angular2'

@Component({
  selector: 'conf-talks',
  template: `<div *ngFor="talk of talks">
     {{talk.title}} by {{talk.speaker}}
     <p>{{talk.description}}
   </div>`
})
class ConfTalks {
  talks = [ {title: 't1', speaker: 'Brian', description: 'talk 1'},
            {title: 't2', speaker: 'Julie', description: 'talk 2'}];
}
@Component({
  selector: 'my-app',
  directives: [ConfTalks],
  template: '<conf-talks></conf-talks>'
})
class App {}
bootstrap(App, [])

错误是

EXCEPTION: Template parse errors:
Can't bind to 'ngFor' since it isn't a known native property
("<div [ERROR ->]*ngFor="talk of talks">

Answer 1

Angular2测试版中使用的此语句.....

以后用let代替#

let关键字用于声明局部变量

Answer 2

另一个导致操作错误的错误可能是在中使用:

<div *ngFor="let talk in talks">

您应该改用:

<div *ngFor="let talk of talks">

Answer 3

我在talk前面错过了let:

<div *ngFor="let talk of talks">

请注意，从Beta.17开始，不推荐使用#...在结构化指令（如NgFor）中声明局部变量。改用let。

现在变为

原答案：

我错过了talk前面的#:

<div *ngFor="#talk of talks">

很容易忘记#。我希望Angular exception错误消息会改为:
您忘记了#again。