首先,我将 DomSanitizer 导入到组件中:
import { DomSanitizer, SafeResourceUrl} from '@angular/platform-browser';
之后,我创建了一个类并将其添加到构造函数中:
export class BlocklyComponent implements OnInit {
primaryWorkspace: Blockly.WorkspaceSvg;
GEE = "PCFET0NUWVBFIGh0bWw+Cgo8aGVhZD4KPG1ldGEgY29udGVudD0idGV4dC9odG1sOyBjaGFyc...";
public geeMap: SafeResourceUrl;
constructor(private sanitizer: DomSanitizer) {}
ngOnInit() {
在 NgOnInit 函数内部,它可以正常工作,但是,在 updateURL 函数中(在 NgOnInit 外部但在类内部)它说 this.sanitizer 未定义:
//Creates de src that has to be in the iframe. What I need to do is to update this safeResourceUrl.
this.geeMap = this.sanitizer.bypassSecurityTrustResourceUrl(`data:text/html;base64,${this.GEE}`);
//Reads the events in a workspace. When it notices a change, it triggers the updateURL function
primaryWorkspace.addChangeListener(this.updateURL);
}
updateURL(primaryEvent)
{
if (primaryEvent.isUiEvent) {
return; //Do not clone ui events
};
console.log('hola');
//Problem. Here it sais that this.sanitizer is undefined.
this.geeMap = this.sanitizer.bypassSecurityTrustResourceUrl(`data:text/html;base64,${this.GEE}`);
}
我知道这是一个典型的问题,在我身上发生了很多次,但是现在我不知道如何解决它。我试图在不同的论坛中寻找未定义的问题,但我仍然无法解决它。非常感谢你