react-native - react native AsyncStorage : Push to an array with a key

Question

嗨，我在向 AsyncStorage 中的数组添加值时遇到问题。

AsyncStorage.getItem('savedIds', (err, result) => {
  const id = '1';
  if (result !== null) {
      console.log('Data Found', result);
      result = JSON.parse(result);
      result.push(id);
      AsyncStorage.setItem('savedIds', JSON.stringify(result));
    } else {
      console.log('Data Not Found');
      AsyncStorage.setItem('savedIds', id);
    }
});

AsyncStorage.getItem('savedIds', (err, result) => {
  console.log(result);
});

设置初始 id 后，我收到错误“result.push”不是函数。我需要改变什么来解决这个问题？或者有更优雅的解决方案吗？

Answer 1

AsyncStorage.getItem('savedIds', (err, result) => {
  const id = [1];
  if (result !== null) {
    console.log('Data Found', result);
    var newIds = JSON.parse(result).concat(id);
    AsyncStorage.setItem('savedIds', JSON.stringify(newIds));
  } else {
    console.log('Data Not Found');
    AsyncStorage.setItem('savedIds', JSON.stringify(id));
  }
});