角2动态组件生成，TS编译错误

Question

我可以用这个方法来创建动态组件：

public addItem<T extends WidgetComponent>(ngItem: {new(): T}): T { 
    let factory = this._componentFactoryResolver.resolveComponentFactory(ngItem); 
    const ref = this._viewCntRef.createComponent(factory); 
    const newItem: T = ref.instance as T; 
    ... 
    return newItem; 
    } 

，并调用它是这样的：

const ref: MyWidgetComponent = this.dashboard.addItem<MyWidgetComponent>(MyWidgetComponent); 

但打字稿把我这个编译错误： app.component.ts:45:35 Untyped function calls may not accept type arguments.

我试图用Type<T>代替{new(): T}但我有同样的错误：app.component.ts:45:35 Untyped function calls may not accept type arguments.

这里的正确定义是什么？因为代码的工作很大...

编辑：这里是完整的代码，如果你想看到它在的地方https://github.com/jaumard/ng2-dashboard/blob/master/components/dashboard/dashboard.component.ts#L99

Answer 1

我设法通过改变签名修复编译错误：

public addItem(ngItem: Type<WidgetComponent>): WidgetComponent 

而这样的呼叫：

const ref: MyWidgetComponent = this.dashboard.addItem(MyWidgetComponent) as MyWidgetComponent;