Renderer2 启用/禁用 Mat-radio-button-group

Question

我有一个以禁用状态开始的 mat-radio-button-group，并希望以编程方式更改禁用值

@ViewChild('voice_card_choices') voiceCardChoices: ElementRef; 

this.renderer.setProperty(this.voiceCardChoices, 'disabled', false); // Doesn't work
this.voiceCardChoices.disabled = false; // Doesn't work, just creates a new property called disabled on the object
this.voiceCardChoices.nativeElement.disabled = false; //Doesn't work, same case as above

尝试同时使用Renderer2和ElementRef和nativeElement ，似乎没有任何效果

Answer 1

如果您将ElementRef更改为MatRadioButton或MatRadioButtonGroup它工作

此代码无需渲染即可工作

constructor(public renderer: Renderer2) {} 
@ViewChild('voice_card_choices') voiceCardChoices: MatRadioButton || ElementRef ; 

functionToDisableDropDown() {
  this.voiceCardChoices.disabled = true;
}

希望有用