如何在React Native中将函数作为属性传递给组件

Question

我创建了一个JS函数，该函数返回带有某些子组件的视图，并且我正在重用代码。我想知道如何将函数传递给由函数创建的组件

const MenuItem = ({title,indicatorColor,index,onPressItem}) => (
      <TouchableOpacity onPress={()=>onPressItem(index)} >
        <View
          style={{
            paddingLeft: 20,
            paddingBottom: 15,
            paddingTop: 15,
            flexDirection: 'row',
            width: 150,
            borderRightWidth: 2,
            borderRightColor: 'Colors.GREY_TWO',
            backgroundColor: indicatorColor,
            alignItems: 'center',
          }}>
          <View 
            style={{
              backgroundColor: 'black',
              height: 5,
              width: 5,
              borderRadius: 3,
              alignSelf: 'center',
  
            }} 
          /> 
          <Text style={{fontSize: 15, left: 5,alignItems: 'center',}}>{title}</Text>
        </View>
      </TouchableOpacity>
  );

  const onMenuItemPress = (index) => {
      console.log('menu selected:'.index);
  }
  
  <MenuItem title='Sort' indicatorColor='red' index='0' onPress={onMenuItemPress} />

上面的代码抛出错误，提示onMenuPress不是函数，请提出建议。

Answer 1

将函数包装在返回的Component中：

const MenuItem = ({title,indicatorColor,index,onPressItem}) => {

     const onMenuItemPress = (index) => {
         console.log('menu selected:'.index);
     }

     return (
      <TouchableOpacity onPress={()=>onPressItem(index)} >
        <View
          style={{
            paddingLeft: 20,
            paddingBottom: 15,
            paddingTop: 15,
            flexDirection: 'row',
            width: 150,
            borderRightWidth: 2,
            borderRightColor: 'Colors.GREY_TWO',
            backgroundColor: indicatorColor,
            alignItems: 'center',
          }}>
          <View 
            style={{
              backgroundColor: 'black',
              height: 5,
              width: 5,
              borderRadius: 3,
              alignSelf: 'center',

            }} 
          /> 
          <Text style={{fontSize: 15, left: 5,alignItems: 'center',}}>{title} 
          </Text>
        </View>
      </TouchableOpacity>
     )
  };


  <MenuItem title='Sort' indicatorColor='red' index='0' onPress={onMenuItemPress} />