【Ts之Omit 排除属性】

FlatListDemo的props需要传入arr，和 需要渲染的renderItem，需要排除data属性

import React from 'react';
import { FlatList, Text, View, FlatListProps } from 'react-native';

interface FunctionViewProps<T> extends Omit<FlatListProps<T>, 'renderItem' | 'data'> {
  arr: T[];
  renderItem: (item: T) => JSX.Element;
}

interface IArrItem {
  id: number;
  name: string;
}


const FlatListDemo: React.FC<FunctionViewProps<IArrItem>> = ({ arr, renderItem, ...rest }) => {
  return (
    <FlatList
      {...rest}
      data={arr}
      renderItem={({ item }) => renderItem(item)}
      keyExtractor={({ id }) => id.toString()}
    />
  );
};

export default FlatListDemo;

app.tsx中使用

interface Item {
  id: number;
  name: string;
}

const arr: Item[] = [
  { id: 1, name: 'JavaScript' },
  { id: 2, name: 'Html' },
  { id: 3, name: 'Css' },
  { id: 4, name: 'Node' },
  { id: 5, name: 'java' },
]

const App = (): JSX.Element => {
  const renderListItem = (item: Item) => {
    return (
      <View style={{ width: '100%', height: 50, backgroundColor: '#cccccc', marginBottom: 10 }}>
        <Text style={{ textAlign: 'center', lineHeight: 50 }}>{item.name}</Text>
      </View>
    );
  }
return (
	<FlatListDemo renderItem={renderListItem} arr={arr} />
	)
}