对于大数据,可以在存储之前将其分割成较小的块。并且使用SQLite或Realm等本地数据库来进行存储。
示例代码:
import SQLite from 'react-native-sqlite-storage';
const db = SQLite.openDatabase({ name: 'my.db' });
const saveData = async (data) => {
// 将大数据分割成块
const chunkSize = 100;
for (let i = 0; i < data.length; i += chunkSize) {
const chunkData = data.slice(i, i + chunkSize);
// 存储每个块
await new Promise((resolve, reject) => {
const valuesString = chunkData.map(datum => `("${datum}")`).join(',');
const sql = `INSERT INTO my_table (data) values ${valuesString};`;
db.transaction((tx) => {
tx.executeSql(sql, [], () => {
resolve(true);
}, (err) => {
reject(err);
});
});
});
}
};
const getData = async () => {
// 从数据库中读取所有数据
const sql = 'SELECT * FROM my_table;';
const results = await new Promise((resolve, reject) => {
db.transaction((tx) => {
tx.executeSql(sql, [], (_, { rows }) => {
resolve(rows);
}, (err) => {
reject(err);
});
});
});
// 将数据合并并返回
return results._array.map(result => result.data);
};