我想在角度6中使用@ViewChild
从不同的组件打开ngx-bootstrap模式,但是我收到此错误。
错误TypeError:无法在ComponentLoader.push中读取null的属性'createText'../ node_modules / ngx-bootstrap / component-loader / component-loader.class.js.ComponentLoader._getContentRef
在Inspect Element中,此标记也可见
<bs-modal-backdrop class="modal-backdrop fade in"></bs-modal-backdrop>
你从哪里尝试接触孩子什么时候?
尝试在AfterViewInit()
生命周期中打开它,因为在尝试加入它时可能他不是init。
您可以使用选择器在视图中调用模态上的其他组件并使用
@Input()
在被调用组件内发送数据@Output()
EventEmitter从被调用组件返回tadaOnChanges
绑定被调用组件中的更改像下面的例子
这是第一个组件:
import { Component, TemplateRef } from '@angular/core';
import { BsModalService, BsModalRef } from 'ngx-bootstrap/modal';
@Component({
selector: 'demo-modal-service-static',
templateUrl: './service-template.html'
})
export class DemoModalServiceStaticComponent {
modalRef: BsModalRef;
constructor(private modalService: BsModalService) {}
openModal(template: TemplateRef<any>) {
this.modalRef = this.modalService.show(template);
}
// Use change happen after modal
public callAfterAdd(modifiedProduct){
// close this.modalRef
}
}
这是在Modal
中调用的另一个组件:
import { Component, TemplateRef , OnInit, OnChanges, Input, Output, EventEmitter, SimpleChanges} from '@angular/core';
import { BsModalService, BsModalRef } from 'ngx-bootstrap/modal';
@Component({
selector: 'app-product',
templateUrl: './app-product.html' // put what you want in view
})
export class AppProductComponent implements OnInit, OnChanges {
@Input() product : any;
@Output() afterAdd = new EventEmitter<any>();
public id: number;
constructor(private modalService: BsModalService) {}
ngOnInit() {
}
public ngOnChanges (changes: SimpleChanges) {
console.log(this.product);// see product here
this.id = changes.product.currentValue.id;
if(this.id){
// see here if some change occur in the first component
}
}
/**
*This function returns the modified product in DemoModalServiceStaticComponent => callAfterAdd
*/
someOtherFunction(){
//change something in product
//then send the modified data to the
this.afterAdd.emit (this.product);
}
}
这是第一个组件的视图
<button type="button" class="btn btn-primary" (click)="openModal(template)">Create template modal</button>
<ng-template #template>
<div class="modal-header">
<h4 class="modal-title pull-left">Modal</h4>
<button type="button" class="close pull-right" aria-label="Close" (click)="modalRef.hide()">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
<app-product [product]=dataTopass (afterAdd)="callAfterAdd(modifiedProduct)"></app-product>
</div>
</ng-template>