在 onPress 中反应原生 Typescript Formik 的 handleSubmit 类型

Posted 2023-03-13

【中文标题】在 onPress 中反应原生 Typescript Formik 的 handleSubmit 类型

【英文标题】：React Native Typescript Formik typings of handleSubmit in onPress

【发布时间】：2020-04-23 05:29:01

【问题描述】：

我刚刚开始使用 Typescript 在 React Native 上开展一个项目，并跟随 Formik 在我的应用程序中构建表单。

我做了很棒的formik tutorial guide 并看到了formik with RN section in JS 的使用。

但是，当我尝试将此示例翻译成打字稿时，我在Button's onPress attribute 上收到以下输入错误：

No overload matches this call.
  Overload 1 of 2, '(props: Readonly<ButtonProps>): Button', gave the following error.
    Type '(e?: FormEvent<htmlFormElement>) => void' is not assignable to type '(ev: NativeSyntheticEvent<NativeTouchEvent>) => void'.
      Types of parameters 'e' and 'ev' are incompatible.
        Type 'NativeSyntheticEvent<NativeTouchEvent>' is not assignable to type 'FormEvent<HTMLFormElement>'.
          Types of property 'nativeEvent' are incompatible.
            Type 'NativeTouchEvent' is missing the following properties from type 'Event': bubbles, cancelBubble, cancelable, composed, and 17 more.
  Overload 2 of 2, '(props: ButtonProps, context?: any): Button', gave the following error.
    Type '(e?: FormEvent<HTMLFormElement>) => void' is not assignable to type '(ev: NativeSyntheticEvent<NativeTouchEvent>) => void'.ts(2769)
index.d.ts(6926, 5): The expected type comes from property 'onPress' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<Button> & Readonly<ButtonProps> & Readonly< children?: ReactNode; >'
index.d.ts(6926, 5): The expected type comes from property 'onPress' which is declared here on type 'IntrinsicAt...

据我了解，handleSubmit 函数(e?: FormEvent<HTMLFormElement>) => void 接受来自表单提交的事件（onSubmit 元素的onSubmit 属性）。由于 RN 中没有等效的 Form，它抱怨从 RN Button's onPress 属性接收到 (ev: NativeSyntheticEvent<NativeTouchEvent>) => void。

为了摆脱错误并继续前进，我使用了以下我不满意的解决方法：

 <Button
              title="Do it !"
              color=colors.red
              onPress=
                (handleSubmit as unknown) as (
                  ev: NativeSyntheticEvent<NativeTouchEvent>
                ) => void
              
/>

我想知道我应该如何正确解决这个打字错误。

CodeSandbox: App.tsx:32

感谢您的帮助。

【参考方案1】：

你可以这样描述你的类型：(event: GestureResponderEvent) => void;

Code sample