我认为这个链接可以回答你的问题:

I think this link will answer your question:

• Angular 2 自定义表单输入

我们需要实现两件事来实现这一目标:

We need to implement two things to achieve that:

• 提供表单组件逻辑的组件.它不需要输入，因为它将由 ngModel 本身提供
• 一个自定义的 ControlValueAccessor 将实现这个组件和 ngModel/ngControl
之间的桥梁

• A component that provides the logic of your form component. It doesn't need an input since that will be provided by ngModel itself
• A custom ControlValueAccessor that will implement the bridge between this component and ngModel / ngControl

上一个链接为您提供了一个完整的示例...

The previous link gives you a complete sample...