我正在开展Angular项目(目前是第5版),并使用ng-bootstrap。
我已经关注了ng-bootstrap文档,并且通过一些修改有一个模态组件工作,我可以从多个组件调用,每次都传递一个唯一的标题和消息。
当模态关闭时,我通过组件上的{{confirmationModal.closeResult}}返回closeResult,但是我无法及时将其返回到代码中,以便根据结果进行分支执行。如果我再次打开模态,而不是当前结果,则该值在我的方法中可用于前一个closeResult。
我的意图是将其用作确认模式,例如“你确定要删除它吗?”#39;等
请在此处查看此Plunkr:http://plnkr.co/edit/4thFjHietATRYn6g24ie?p=preview
您可以在记录的输出中看到第一个closeResult未定义,因为当模态可见时,函数中的代码继续执行。再次调用Modal时,将注销先前的closeResult。
window.onpopstate = function(event) {
console.log('same state',
JSON.stringify(event.state) === JSON.stringify(history.state) // always true
);
};
const obj1 = {page: 1};
history.pushState(obj1, "title 1", "?page=1");
console.log('[SameObject]', history.state === obj1); // false
console.log(history.state); // {page: 1}
history.pushState({page: 2}, "title 2", "?page=2");
history.replaceState({page: 3}, "title 3", "?page=3");
history.back();
history.back();
history.go(2);
我希望代码在执行之前等待结果,并且我不确定是否应该使用循环来跟随模态,直到设置了closeResult值,但是这看起来并不像正确的方法来解决这个问题。
我原本期望Modal暂停代码执行并在关闭对话框时返回closeResult,或者将closeResult作为Observable使用,但我似乎无法使其按照我需要的方式工作/期待它。
以下代码在Plunkr中,它是我的项目中使用的代码的修改版本,基于ng-bootstrap示例Plunkr。
我的modal-basic.ts文件:
[Log] this.confirmationModal.closeResult – undefined
[Log] this.confirmationModal.closeResult – "Dismissed with: Cancel"
[Log] this.confirmationModal.closeResult – "Closed with: Ok"
[Log] this.confirmationModal.closeResult – "Dismissed with: Cancel"
[Log] this.confirmationModal.closeResult – "Dismissed with: Cross click"
modal-basic.html文件:
import {Component, Input, ViewChild} from '@angular/core';
import {NgbModal, ModalDismissReasons} from '@ng-bootstrap/ng-bootstrap';
@Component({
selector: 'ngbd-modal-basic',
templateUrl: 'src/modal-basic.html'
})
export class NgbdModalBasic {
@Input()
title
@Input()
message;
@ViewChild('content') content: any;
closeResult: string;
constructor(private modalService: NgbModal) {}
open(content) {
this.modalService.open(this.content).result.then((result) => {
this.closeResult = `Closed with: ${result}`;
}, (reason) => {
this.closeResult = `Dismissed ${this.getDismissReason(reason)}`;
});
}
private getDismissReason(reason: any): string {
if (reason === ModalDismissReasons.ESC) {
return 'by pressing ESC';
} else if (reason === ModalDismissReasons.BACKDROP_CLICK) {
return 'by clicking on a backdrop';
} else {
return `with: ${reason}`;
}
}
}
app.ts文件:
<ng-template #content let-c="close" let-d="dismiss">
<div class="modal-header">
<h4 class="modal-title">{{title}}</h4>
<button type="button" class="close" aria-label="Close" (click)="d('Cross click')">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
<p>{{message}}</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-outline-dark" (click)="d('Cancel')">Cancel</button>
<button type="button" class="btn btn-outline-dark" (click)="c('Ok')">Ok</button>
</div>
</ng-template>
答案 0 :(得分:2)
你可以在你的ngb-modal-basic
中使用@Output@Output() close: EventEmitter<any> = new EventEmitter();
...
open(content) {
this.modalService.open(this.content).result.then((result) => {
this.closeResult = `Closed with: ${result}`;
this.close.emit(result); //<---return the result
}, (reason) => {
this.closeResult = `Dismissed ${this.getDismissReason(reason)}`;
this.close.emit(result); //<---return the result
});
}
您可以在您的组件中使用:
<ngbd-modal-basic [message]='message' [title]='title' #confirmationModal (close)="close(result)"></ngbd-modal-basic>
... and
close(result)
{
console.log(result)
}