Question

我有一个实现ControlValueAccessor的Angular组件，但永远不会使用writeValue的初始值调用ngModel方法。

模板：

<my-comp [(ngModel)]="$ctrl.activeUser"></my-comp>

该组件通过以下方式降级为AngularJS：

.directive('myComp', downgradeComponent({
  component: MyComp,
  inputs: [],
  outputs: [],
}));

我尝试将ngModel添加到inputs和outputs，但它无效。

Answer 1

您应该使用[(ngModel)]属性而不是<my-comp ng-model="$ctrl.activeUser"></my-comp>，如下所示：* 3. `ng-model` is controlled by AngularJS and communicates with the downgraded Angular component * by way of the `ControlValueAccessor` interface from @angular/forms. Only components that * implement this interface are eligible. * * ## Supported Features * * - Bindings: * - Attribute: `<comp name="World">` * - Interpolation: `<comp greeting="Hello {{name}}!">` * - Expression: `<comp [name]="username">` * - Event: `<comp (close)="doSomething()">` * - ng-model: `<comp ng-model="name">`

来自角度文档：

{{1}}

如何在降级的Angular组件上实现ControlValueAccessor

1 个答案: