我正在使用Google Maps API验证地址。我有一个服务通过名为[[checkDistance()的函数来处理此问题。在该服务中,我创建了一个名为verifyMessage $的可观察对象,以在视图中进行通信(如果地址有效或无效)。
视图包含一个验证按钮,该按钮调用组件函数verifyAddress()
,然后调用该服务的checkDistance();这里是问题:
在我再次单击页面之前,可观察对象不会使用新值进行更新。我单击验证,然后在控制台中看到设置了结果,但是“ Loading ...”并没有消失,并且直到我随机单击某处的页面时,verifyMessage的值才会更新。我究竟做错了什么?我该如何解决?delivery-component.html
<input formControlName="address" matInput placeholder="Start typing delivery address..." google-place>
<button mat-raised-button color="primary" (click)="verifyAddress()" class="col-2">Verify</button>
<p class="col-12" *ngIf="checkout.verifyMessage$ | async as message; else no message">{{ message.value }}</p>
<p class="col-12" *ngIf="checkout.loading">Loading...</p>
结帐服务:
... async checkDistance(location_obj) { this.loading = true; ... Google Maps API stuff .. this.result = this.checkValidity(distance); console.log('result is: ', this.result); if (this.result) { // if valid set this message so can be updated in view this.verifyMessage$.next({value: 'Great, that address is in our range.'}); this.loading = false; this.verified=true; } else { this.verifyMessage$.next({value: 'Uh oh, that address is out of our range. '}); this.loading = false; this.verified=false; } }); }
deliveryPrompt.component.ts
import ...
export class DeliveryPromptComponent implements OnInit {
deliveryAddressForm: FormGroup;
message: string;
verified$ = new BehaviorSubject({value: false});
verified = this.verified$.asObservable();
loading = false;
constructor(public dialogRef: MatDialogRef<DeliveryPromptComponent>, @Inject(MAT_DIALOG_DATA) public data: any, public checkout: CheckoutHandlerService, public fb: FormBuilder, public loginService: AuthService, private cd: ChangeDetectorRef) {
}
ngOnInit() {
this.checkout.verifyMessage$.subscribe();
this.checkout.verifyMessage.subscribe();
this.deliveryAddressForm = this.fb.group({
address: ['', [Validators.required]]
});
this.deliveryAddressForm.valueChanges.subscribe(form => {
//console.log(form);
});
this.message = '';
}
...
async verifyAddress() {
console.group('loading 1', this.loading);
await this.checkout.checkDistance(this.checkout.tempAddress);
}
ng serve
角rxjs没有发送下一个值,但是如果我使用
ng serve --aot=true
有效,这应该是关于优化的问题。希望对您有所帮助!