我有以下形式的FormArray含FormGroups如何獲得angular2
<form [formGroup]="screenForm" novalidate>
<div formArrayName="iPhoneScreenshots" class="row">
<div *ngIf="screenForm.controls.iPhoneScreenshots?.length > 0">
{{screenForm.controls.iPhoneScreenshots?.length }}
<div *ngFor="let url of screenForm.controls.iPhoneScreenshots.controls; let i=index">
<div [formGroupName]="i">
<input class="form-control" formControlName="url">
<img src="{{app.screenshotUrls[i]}}" class="rounded img-fluid app-screen" style="height:200px"/>
</div>
</div>
</div>
</div>
</form>
一個FormControl的價值
的URL值來自數組這是越來越回調通過API 填充我設置值:
private setScreenShots(app: ItunesApp): void {
if (app.hasOwnProperty('screenshotUrls')) {
const screenShots = app.screenshotUrls.map(url => {
return this.fb.group({
url: [url, Validators.required]
});
}
);
const screenShotsArray = this.fb.array(screenShots);
this.screenForm.setControl('iPhoneScreenshots', screenShotsArray);
}
}
初始數組爲空
private createForm() {
this.appSiteForm = this.fb.group({
title: ['', Validators.required]
});
this.screenForm = this.fb.group({
iPhoneScreenshots: this.fb.array([]),
});
}
這行代碼看起來很奇怪,我
img src="{{app.screenshotUrls[i]}}"
我這樣做,因爲url.value()或url.get( '值')引發的錯誤。
那麼如何訪問表單控件的值呢?
就是這樣。完美的作品。你能指點我的文檔,因爲我沒有在angular.io上給出的例子中看到這個 – dc10