typescript :onPress 类型

Question

我刚刚将我的 react-native 项目移植到 typescript 并且有一个关于函数作为 Prop 的问题

我通过:

<DisplayCardsWithLikes
data={testData}
likes={500}
onPress={() => this.props.navigation.navigate("CardDetailScreen")}
/>

到

type Props = {
  onPress: Function
}


const FloatingActionButtonSimple = (props:Props) => {
  const {onPress} = props
  return (
    <View style={styles.containerFab}>
      <TouchableOpacity style={styles.fab} onPress={onPress}>
        <Icon name="plus" size={16} color={"white"} />
      </TouchableOpacity>
    </View>
  );
};

错误:

Error, caused by child onPress:
o overload matches this call.
  Overload 1 of 2, '(props: Readonly<TouchableOpacityProps>): TouchableOpacity', gave the following error.
    Type 'Function' is not assignable to type '(event: GestureResponderEvent) => void'.
      Type 'Function' provides no match for the signature '(event: GestureResponderEvent): void'.
  Overload 2 of 2, '(props: TouchableOpacityProps, context?: any): TouchableOpacity', gave the following error.
    Type 'Function' is not assignable to type '(event: GestureResponderEvent) => void'.ts(2769)
index.d.ts(5125, 5): The expected type comes from property 'onPress' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<TouchableOpacity> & Readonly<TouchableOpacityProps> & Readonly<...>'
index.d.ts(5125, 5): The expected type comes from property 'onPress' which is declared here on type 'IntrinsicAttributes & IntrinsicClassAttributes<TouchableOpacity> & Readonly<TouchableOpacityProps> & Readonly<...>'

概括:
onPress 作为 Prop 传递(是一个函数)。在子类型 onPress:Function 上显示错误(上面的那个)，但 onPress:any 有效。我基本上不知道 onPress prop 是哪种类型

所以没什么疯狂的，但是如果我将 onPress 定义为一个函数，它会显示一个错误，所以显然这不是正确的类型。你知道这个 onPress 函数是哪种类型吗？

非常感谢!

Answer 1

您需要定义类型如下以摆脱 tslint 的类型错误:

type Props {
   onPress: (event: GestureResponderEvent) => void
}

或者

type Props {
   onPress(): void
}

或者

type Props {
   onPress(params: type): void
}