我在模态中显示图像。它在Web上工作正常,但在Android设备上仅间歇性地显示图像(否则显示没有图像占位符)。如果我通过单击缩略图来关闭并重新打开模式/图像,则大约有25%的时间显示图像。
我认为这与我作为参数传递的base64图像数据的异步加载有关。我猜该页面在加载之前呈现。有什么想法可以解决这个问题?
模态调用:
<ion-col size="3" *ngFor="let image of check.images">
<ion-thumbnail>
<ion-img [src]="image" (click)="onViewImage(image)"></ion-img>
</ion-thumbnail>
</ion-col>
constructor(private plt: Platform,
private fileOpener: FileOpener,
public defectReportService: DefectReportService,
private router: Router,
private route: ActivatedRoute,
private socialSharing: SocialSharing,
public storage: Storage,
private notificationService: NotificationService,
public modalCtrl: ModalController,
private navCtrl: NavController
) { }
onViewImage(imageDataUrl: string) {
this.modalCtrl.create({
component: ViewImageComponent,
componentProps: { imageDataUrl: imageDataUrl }
}).then(modalEl => {
modalEl.present();
});
}
模态代码:
<ion-content class="content-modal">
<div class="content-inner">
<ion-img [src]="imageDataUrl" (click)="onCloseModal()"></ion-img>
</div>
</ion-content>
export class ViewImageComponent implements OnInit {
@Input() imageDataUrl: string;
constructor(private modalCtrl: ModalController) { }
ngOnInit() {
}
onCloseModal() {
this.modalCtrl.dismiss();
}
}
使用navParams解决方案修复了此处:
https://medium.com/@david.dalbusco/how-to-declare-and-us-modals-in-ionic-ionic-v4-4d3f42ac30a3
以下代码有100%的时间工作:
export class ViewImageComponent implements OnInit {
@Input() imageDataUrl: string;
imageDataUrl2: string;
constructor(private modalCtrl: ModalController,
private navParams: NavParams) { }
ngOnInit() {
}
ionViewWillEnter() {
this.imageDataUrl2 = this.navParams.get('imageDataUrl');
}
onCloseModal() {
this.modalCtrl.dismiss();
}
}
<ion-content class="content-modal">
<div *ngIf="imageDataUrl2" class="content-inner">
<ion-img [src]="imageDataUrl2" (click)="onCloseModal()"></ion-img>
</div>
</ion-content>