我正在使用Angular8,并尝试使用addControl将子FormGroup添加到表单中: id: new FormControl(0), }), this.testForm.controls['people'].addControlnew FormGroup({
number: new FormControl('123
private el: ElementRef, this.form = new FormGroup({}); this.form.addControl(`lastname`, new FormControl(''));
this.form.addControl(`title`, new FormCont