angular - AoT NGC/Angular2 : Property is protected and only accessible within class Error

Question

在我正在使用的 Angular 2/Ionic 2 (final/rc0) 项目中的一个组件中:

protected contentTarget: ViewContainerRef;

ngOnInit() {
        this.contentTarget.createComponent(componentFactory);
    }

AoT 编译器说:

Error at ....: Property 'contentTarget' is protected and only accessible within class 'IncludeTemplateComponent' and its subclasses.

变量(属性)未在整个项目的任何其他地方使用。

所以...任何人都可以阐明这一点，是 createComponent 工厂将 contentTarget 变量传递给它的子变量，还是为什么编译器不喜欢在这里 protected ？ protected 变量现在在所有 Angular2 中都被“禁止”了吗？

Answer 1

来自 here

For a given component all its members (methods, properties) accessed by its template must be public in the ahead-of-time compilation scenario. This is due to the fact that a template is turned into a TS class. A generated class and a component are 2 separate classes now and you can't access private members cross-class.

我的看法是 contentTarget 由模板引擎使用，因此必须公开 AOT 才能工作。