有没有一种不那么复杂的方法在angular 2中创建确认对话框?这个想法是点击一个项目,然后显示一个弹出窗口或模态框来确认其删除,我尝试了这里的angular 2模态框angular2-modal,但我不知道如何让它在确认或取消时执行某些操作。单击函数运行良好,唯一的问题是我不太清楚如何使用它。我还有另一个使用相同插件但不同的模态框。
this.modal.open(MyComponent);
我不想为了显示确认框而创建另一个组件,所以我想问一下。
有没有一种不那么复杂的方法在angular 2中创建确认对话框?这个想法是点击一个项目,然后显示一个弹出窗口或模态框来确认其删除,我尝试了这里的angular 2模态框angular2-modal,但我不知道如何让它在确认或取消时执行某些操作。单击函数运行良好,唯一的问题是我不太清楚如何使用它。我还有另一个使用相同插件但不同的模态框。
this.modal.open(MyComponent);
我不想为了显示确认框而创建另一个组件,所以我想问一下。
方法一
确认的一个简单方式是使用本地浏览器的确认提示。 模板可以有一个按钮或链接。
<button type=button class="btn btn-primary" (click)="clickMethod('name')">Delete me</button>
组件方法可以像下面这样。
clickMethod(name: string) {
if(confirm("Are you sure to delete "+name)) {
console.log("Implement delete functionality here");
}
}
方法2
另一种获得简单确认对话框的方法是使用Angular Bootstrap组件,比如ng-bootstrap或ngx-bootstrap。您只需安装组件并使用模态组件即可。
方法3
下面提供了另一个在我的项目中实现简单确认弹出窗口的方法,使用了angular2/material
。
app.module.ts
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { ConfirmationDialog } from './confirm-dialog/confirmation-dialog';
@NgModule({
imports: [
...
FormsModule,
ReactiveFormsModule
],
declarations: [
...
ConfirmationDialog
],
providers: [ ... ],
bootstrap: [ AppComponent ],
entryComponents: [ConfirmationDialog]
})
export class AppModule { }
确认对话框.ts
import { Component, Input } from '@angular/core';
import { MdDialog, MdDialogRef } from '@angular/material';
@Component({
selector: 'confirm-dialog',
templateUrl: '/app/confirm-dialog/confirmation-dialog.html',
})
export class ConfirmationDialog {
constructor(public dialogRef: MdDialogRef<ConfirmationDialog>) {}
public confirmMessage:string;
}
确认对话框.html
<h1 md-dialog-title>Confirm</h1>
<div md-dialog-content>{{confirmMessage}}</div>
<div md-dialog-actions>
<button md-button style="color: #fff;background-color: #153961;" (click)="dialogRef.close(true)">Confirm</button>
<button md-button (click)="dialogRef.close(false)">Cancel</button>
</div>
app.component.html
<button (click)="openConfirmationDialog()">Delete me</button>
应用程序组件.ts
import { MdDialog, MdDialogRef } from '@angular/material';
import { ConfirmationDialog } from './confirm-dialog/confirmation-dialog';
@Component({
moduleId: module.id,
templateUrl: '/app/app.component.html',
styleUrls: ['/app/main.css']
})
export class AppComponent implements AfterViewInit {
dialogRef: MdDialogRef<ConfirmationDialog>;
constructor(public dialog: MdDialog) {}
openConfirmationDialog() {
this.dialogRef = this.dialog.open(ConfirmationDialog, {
disableClose: false
});
this.dialogRef.componentInstance.confirmMessage = "Are you sure you want to delete?"
this.dialogRef.afterClosed().subscribe(result => {
if(result) {
// do confirmation actions
}
this.dialogRef = null;
});
}
}
index.html => 加入以下样式表
<link rel="stylesheet" href="node_modules/@angular/material/core/theming/prebuilt/indigo-pink.css">
@import '~@angular/material/prebuilt-themes/deeppurple-amber.css';
以及遵循了这个指南。 - hestellezgmd
替换为 mat
,并且可能使用一些内置的样式来创建按钮:mat-raised-button color="primary"
。 - Alexei - check Codidact你可以在函数内部结合 if 条件使用 window.confirm
delete(whatever:any){
if(window.confirm('Are sure you want to delete this item ?')){
//put your delete method logic here
}
}
当您调用 delete 方法时,它会弹出一个确认消息,当您按下“确定”按钮时,它将执行 if 条件内的所有逻辑。
我来晚了,但这里有另一个使用 ng-bootstrap 的实现:https://stackblitz.com/edit/angular-confirmation-dialog
confirmation-dialog.service.ts
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs/Observable';
import { NgbModal } from '@ng-bootstrap/ng-bootstrap';
import { ConfirmationDialogComponent } from './confirmation-dialog.component';
@Injectable()
export class ConfirmationDialogService {
constructor(private modalService: NgbModal) { }
public confirm(
title: string,
message: string,
btnOkText: string = 'OK',
btnCancelText: string = 'Cancel',
dialogSize: 'sm'|'lg' = 'sm'): Promise<boolean> {
const modalRef = this.modalService.open(ConfirmationDialogComponent, { size: dialogSize });
modalRef.componentInstance.title = title;
modalRef.componentInstance.message = message;
modalRef.componentInstance.btnOkText = btnOkText;
modalRef.componentInstance.btnCancelText = btnCancelText;
return modalRef.result;
}
}
确认对话框组件.confirmation-dialog.component.ts
import { Component, Input, OnInit } from '@angular/core';
import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap';
@Component({
selector: 'app-confirmation-dialog',
templateUrl: './confirmation-dialog.component.html',
styleUrls: ['./confirmation-dialog.component.scss'],
})
export class ConfirmationDialogComponent implements OnInit {
@Input() title: string;
@Input() message: string;
@Input() btnOkText: string;
@Input() btnCancelText: string;
constructor(private activeModal: NgbActiveModal) { }
ngOnInit() {
}
public decline() {
this.activeModal.close(false);
}
public accept() {
this.activeModal.close(true);
}
public dismiss() {
this.activeModal.dismiss();
}
}
确认对话框组件.confirmation-dialog.component.html
<div class="modal-header">
<h4 class="modal-title">{{ title }}</h4>
<button type="button" class="close" aria-label="Close" (click)="dismiss()">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
{{ message }}
</div>
<div class="modal-footer">
<button type="button" class="btn btn-danger" (click)="decline()">{{ btnCancelText }}</button>
<button type="button" class="btn btn-primary" (click)="accept()">{{ btnOkText }}</button>
</div>
使用对话框的方式如下:
public openConfirmationDialog() {
this.confirmationDialogService.confirm('Please confirm..', 'Do you really want to ... ?')
.then((confirmed) => console.log('User confirmed:', confirmed))
.catch(() => console.log('User dismissed the dialog (e.g., by using ESC, clicking the cross icon, or clicking outside the dialog)'));
}
更新:添加了Plunkr
我在所有论坛上都寻找解决方案,但是没有找到,所以找到了一种使用老式JavaScript回调函数的解决方案。
这是一种非常简单和干净的方法来创建确认对话框,并为YES和NO点击事件设置回调函数。
我使用Bootstrap CSS用于模态窗口以及带有rxjs Subject的警报服务。
alert.component.html
<div *ngIf="message.type == 'confirm'" class="modal-body">
<div class="row">
<div class="col-md-12">
<h3 class="text-center">{{message.text}}</h3>
</div>
</div>
<div class="row">
<div class="col-md-12">
<p class="text-center">
<a (click)="message.noFn()">
<button class="btn btn-pm">No</button>
</a>
<a (click)="message.siFn()">
<button class="btn btn-sc" >Yes</button>
</a>
</p>
</div>
</div>
</div>
alert.component.ts
export class AlertComponent {
message: any;
constructor(
public router: Router,
private route: ActivatedRoute,
private alertService: AlertService,
) { }
ngOnInit() {
//this function waits for a message from alert service, it gets
//triggered when we call this from any other component
this.alertService.getMessage().subscribe(message => {
this.message = message;
});
}
最重要的部分在这里:alert.service.ts
import { Injectable } from '@angular/core';
import { Router, NavigationStart } from '@angular/router';
import { Observable } from 'rxjs';
import { Subject } from 'rxjs/Subject';
@Injectable() export class AlertService {
private subject = new Subject<any>();
constructor(){}
confirm(message: string,siFn:()=>void,noFn:()=>void){
this.setConfirmation(message,siFn,noFn);
}
setConfirmation(message: string,siFn:()=>void,noFn:()=>void) {
let that = this;
this.subject.next({ type: "confirm",
text: message,
siFn:
function(){
that.subject.next(); //this will close the modal
siFn();
},
noFn:function(){
that.subject.next();
noFn();
}
});
}
getMessage(): Observable<any> {
return this.subject.asObservable();
}
}
从任何组件调用该函数
this.alertService.confirm("You sure Bro?",function(){
//ACTION: Do this If user says YES
},function(){
//ACTION: Do this if user says NO
})
您可以使用sweetalert:https://sweetalert.js.org/guides/
npm install sweetalert --save
然后,只需将其导入您的应用程序:
import swal from 'sweetalert';
如果您传递两个参数,第一个参数将成为模态框的标题,第二个参数将成为其文本。
swal("Here's the title!", "...and here's the text!");
<button (hrsAreYouSure) (then)="confirm(arg1)" (else)="cancel(arg2)">
This will execute confirm if user presses Ok on the confirmation dialog, or cancel if they
hit Cancel
</button>
指令:
import {Directive, ElementRef, EventEmitter, Inject, OnInit, Output} from '@angular/core';
@Directive({
selector: '[hrsAreYouSure]'
})
export class AreYouSureDirective implements OnInit {
@Output() then = new EventEmitter<boolean>();
@Output() else = new EventEmitter<boolean>();
constructor(@Inject(ElementRef) private element: ElementRef) { }
ngOnInit(): void {
const directive = this;
this.element.nativeElement.onclick = function() {
const result = confirm('Are you sure?');
if (result) {
directive.then.emit(true);
} else {
directive.else.emit(true);
}
};
}
}
为了使功能和特性适合您的具体项目需求,最好自己编写代码,但我们通常没有时间编写所有我们想要的小东西。如果您不想为自己编写代码,可以轻松地使用npm包@costlydeveloper/ngx-awesome-popup实现。
您可以通过以下方式仅实现该软件包中的确认框模块:
在您的app.module.ts文件中:
import {NgModule} from '@angular/core';
import {BrowserModule} from '@angular/platform-browser';
import {AppComponent} from './app.component';
// Import your library
import {ConfirmBoxConfigModule, NgxAwesomePopupModule} from '@costlydeveloper/ngx-awesome-popup';
@NgModule({
declarations: [
AppComponent
],
imports : [
BrowserModule,
// Import popup and confirm box module
NgxAwesomePopupModule.forRoot(),
ConfirmBoxConfigModule.forRoot()
],
providers : [],
bootstrap : [AppComponent]
})
export class AppModule {
}
然后可以通过这种方法在 TypeScript 代码的任何地方调用它:
confirmBox() {
const confirmBox = new ConfirmBoxInitializer();
confirmBox.setTitle('Are you sure?');
confirmBox.setMessage('Confirm to delete user: John Doe!');
// Set button labels, the first argument for the confirmation button, and the second one for the decline button.
confirmBox.setButtonLabels('YES', 'NO');
confirmBox.setConfig({
DisableIcon: true, // optional
AllowHTMLMessage: false, // optional
ButtonPosition: 'center', // optional
// Evoke the confirmation box with predefined types.
LayoutType: DialogLayoutDisplay.DANGER // SUCCESS | INFO | NONE | DANGER | WARNING
});
// Simply evoke the popup and listen which button is clicked.
const subscription = confirmBox.openConfirmBox$().subscribe(resp => {
// IConfirmBoxPublicResponse
console.log('ConfirmBox button response: ', resp);
subscription.unsubscribe();
});
}
添加更多答案选项。
您可以使用npm i sweetalert2
别忘了在您的angular.json
中添加样式。
"styles": [
...
"node_modules/sweetalert2/src/sweetalert2.scss"
]
// ES6 Modules or TypeScript
import Swal from 'sweetalert2'
// CommonJS
const Swal = require('sweetalert2')
瞧,你已经准备好了。
Swal.fire({
title: 'Are you sure?',
text: 'You will not be able to recover this imaginary file!',
icon: 'warning',
showCancelButton: true,
confirmButtonText: 'Yes, delete it!',
cancelButtonText: 'No, keep it'
}).then((result) => {
if (result.value) {
Swal.fire(
'Deleted!',
'Your imaginary file has been deleted.',
'success'
)
// For more information about handling dismissals please visit
// https://sweetalert2.github.io/#handling-dismissals
} else if (result.dismiss === Swal.DismissReason.cancel) {
Swal.fire(
'Cancelled',
'Your imaginary file is safe :)',
'error'
)
}
})
更多信息请参考:https://www.npmjs.com/package/sweetalert2
希望这能帮助到某些人。
谢谢。
import {NgModule} from '@angular/core';
import {CommonModule} from '@angular/common';
import {MatDialogModule, MatSelectModule} from '@angular/material';
import {ConfirmationDlgComponent} from './confirmation-dlg.component';
import {FlexLayoutModule} from '@angular/flex-layout';
@NgModule({
imports: [
CommonModule,
FlexLayoutModule,
MatDialogModule
],
declarations: [
ConfirmationDlgComponent
],
exports: [
ConfirmationDlgComponent
],
entryComponents: [ConfirmationDlgComponent]
})
export class SharedModule {
}
这是对话框组件(./confirmation-dlg.component.ts):
import {Component, Inject} from '@angular/core';
import {MAT_DIALOG_DATA} from '@angular/material';
@Component({
selector: 'app-confirmation-dlg',
template: `
<div fxLayoutAlign="space-around" class="title colors" mat-dialog-title>{{data.title}}</div>
<div class="msg" mat-dialog-content>
{{data.msg}}
</div>
<a href="#"></a>
<mat-dialog-actions fxLayoutAlign="space-around">
<button mat-button [mat-dialog-close]="false" class="colors">No</button>
<button mat-button [mat-dialog-close]="true" class="colors">Yes</button>
</mat-dialog-actions>`,
styles: [`
.title {font-size: large;}
.msg {font-size: medium;}
.colors {color: white; background-color: #3f51b5;}
button {flex-basis: 60px;}
`]
})
export class ConfirmationDlgComponent {
constructor(@Inject(MAT_DIALOG_DATA) public data: any) {}
}
import {FlexLayoutModule} from '@angular/flex-layout';
import {NgModule} from '@angular/core';
import {GeneralComponent} from './general/general.component';
import {NgbModule} from '@ng-bootstrap/ng-bootstrap';
import {CommonModule} from '@angular/common';
import {MaterialModule} from '../../material.module';
@NgModule({
declarations: [
GeneralComponent
],
imports: [
FlexLayoutModule,
MaterialModule,
CommonModule,
NgbModule.forRoot()
],
providers: []
})
export class SystemAdminModule {}
import {Component} from '@angular/core';
import {ConfirmationDlgComponent} from '../../../shared/confirmation-dlg.component';
import {MatDialog} from '@angular/material';
@Component({
selector: 'app-general',
templateUrl: './general.component.html',
styleUrls: ['./general.component.css']
})
export class GeneralComponent {
constructor(private dialog: MatDialog) {}
onWhateverClick() {
const dlg = this.dialog.open(ConfirmationDlgComponent, {
data: {title: 'Confirm Whatever', msg: 'Are you sure you want to whatever?'}
});
dlg.afterClosed().subscribe((whatever: boolean) => {
if (whatever) {
this.whatever();
}
});
}
whatever() {
console.log('Do whatever');
}
}
只是像您所做的那样使用this.modal.open(MyComponent);
并不会返回一个对象,您可以订阅其事件,这就是为什么您无法使其执行某些操作。此代码创建并打开一个对话框,我们可以订阅其事件。
如果你简化css和html,这实际上是一个简单的组件,但自己编写它可以让你控制它的设计和布局,而预先编写的组件将需要更重的权重来给你这种控制。