在角度2中,是否可以手动实例化组件A,然后将其传递并在组件B的模板中渲染？
是的,这是支持的.您需要一个ViewComponentRef,例如可以通过将其注入构造函数或使用@ViewChild(‘targetname’)查询和也可以注入的ComponentResolver来获取.
例如,https://stackoverflow.com/a/36325468/217408的代码示例允许使用* ngFor动态添加组件
@Component({
selector: 'dcl-wrapper',template: `<div #target></div>`
})
export class DclWrapper {
@ViewChild('target',{read: ViewContainerRef}) target;
@Input() type;
cmpRef:ComponentRef;
private isViewInitialized:boolean = false;
constructor(private resolver: ComponentResolver) {}
updateComponent() {
if(!this.isViewInitialized) {
return;
}
if(this.cmpRef) {
this.cmpRef.destroy();
}
this.resolver.resolveComponent(this.type).then((factory:ComponentFactory<any>) => {
this.cmpRef = this.target.createComponent(factory)
});
}
ngOnChanges() {
this.updateComponent();
}
ngAfterViewInit() {
this.isViewInitialized = true;
this.updateComponent();
}
ngOnDestroy() {
if(this.cmpRef) {
this.cmpRef.destroy();
}
}
}
