angular - 将 Angular 服务传递给类和基类

Question

我有以下类(class):

export class CellLayer extends BaseLayer {

    constructor(name: string, type: LayerType, private mapService: MapService) {
        super(name, type, mapService);
    }
}

以及相应的抽象类:

export abstract class BaseLayer implements ILayer {

    private _name: string;
    private _type: LayerType;

    constructor(name: string, type: LayerType, private mapService: MapService) {
        this._name = name;
        this._type = type;
    }
}

全局 MapService 对象应该传递给两个类。

但是，我现在收到以下错误:

Types have separate declarations of a private property 'mapService'. (6,14): Class 'CellLayer' incorrectly extends base class 'BaseLayer'.

Answer 1

让它受到保护。

Private 表示该属性对当前类是私有(private)的，因此子组件不能覆盖它，也不能定义它。

export abstract class BaseLayer implements ILayer {

    private _name: string;
    private _type: LayerType;

    constructor(name: string, type: LayerType, protected mapService: MapService) {
        this._name = name;
        this._type = type;
    }
}
export class CellLayer extends BaseLayer {

    constructor(name: string, type: LayerType, protected mapService: MapService) {
        super(name, type, mapService);
    }
}