在 React Native 中写入/编辑/覆盖 json 文件

Question

I know how to read the json file just by importing it

import file from './config/data.json'; console.log(file); .

But is there an easy way to write or edit on it.

Answer 1

Use AsyncStorage for saving local settings:

The following is to set your settings in your code (This example is for some Switch

async setSettings() {
  try {
    var obj = {};
    var settings = await AsyncStorage.getItem('settings');
    settings = JSON.parse(result);
    Object.assign(obj, settings);
    this.setState(obj);
  }
  catch(e) { }
  finally { }
}

The following is to change your settings in your code

switchChanged(field, value) {
  var obj = {};
  obj[field] = value;
  AsyncStorage.getItem('settings').then(function(strResult) {
    var result = JSON.parse(strResult) || {};
    Object.assign(result, obj);
    AsyncStorage.setItem('settings', JSON.stringify(result));
  });
  this.setState(obj);
}

And finally the call at the render method

<Switch
  onValueChange={(value) => this.switchChanged('reminders', value)}
  value={this.state.reminders} />

Hope it can help you :)

Answer 2

If you absolutely want to read/write files you could use react-native-fs .

If you want to persist application specific settings I would recommend using AsyncStorage .