角度2訪問父組件的子組件屬性

Question

需要訪問屬性子元素。 家長：

<div> 
    <shipment-detail #myCarousel ></shipment-detail> 
</div> 

@Component({ 
    selector: "testProject", 
    templateUrl: "app/partials/Main.html", 
    directives: [ShipmentDetail] }) 
class AppComponent { 
    getChildrenProperty() { 
    // I want to get access to "shipment" 
    } 
} 

孩子：

@Component({ 
    selector: "shipment-detail", 
}) 
export class ShipmentDetail { 
    shipment: Shipment; 
} 

Answer 1

見Component Interaction cookbook。因此，使用@ViewChild（）並向ShipmentDetail添加一個方法，父級可以調用它來檢索裝運值，或者直接訪問該屬性，如下所示（因爲我很懶，不想寫一個API /法）：

@Component({ 
    selector: "testProject", 
    templateUrl: "app/partials/Main.html", 
    directives: [ShipmentDetail] 
}) 
export class AppComponent { 
    @ViewChild(ShipmentDetail) shipmentDetail:ShipmentDetail; 
    ngAfterViewInit() { 
     this.getChildProperty(); 
    } 
    getChildProperty() { 
    console.log(this.shipmentDetail.shipment); 
    } 
} 

Plunker