rn-user-defaults

Use UserDefaults (iOS) with React Native and SharedPreferences on AndroidOS.

Getting started

$ npm install rn-user-defaults --save

Mostly automatic installation

$ react-native link rn-user-defaults

Manual installation

iOS

1. In XCode, in the project navigator, right click Libraries ➜ Add Files to [your project's name]
2. Go to node_modules ➜ rn-user-defaults and add RNUserDefaults.xcodeproj
3. In XCode, in the project navigator, select your project. Add libRNUserDefaults.a to your project's Build Phases ➜ Link Binary With Libraries
4. Run your project (Cmd+R)<

Android

• Edit android/settings.gradle and add the following

include ':app', ':rn-user-defaults'

project(':rn-user-defaults').projectDir = new File(rootProject.projectDir, '../node_modules/rn-user-defaults/android')

• Edit android/app/build.gradle and add the following line before the react section in dependencies

dependencies {
    ...
    implementation project(':rn-user-defaults')
    implementation "com.facebook.react:react-native:+"
}

• Add these lines to MainApplication.java

...
import chat.rocket.userdefaults;
...
@Override
protected List<ReactPackage> getPackages() {
    @SuppressWarnings("UnnecessaryLocalVariable")
    List<ReactPackage> packages = new PackageList(this).getPackages();
    ...
    packages.add(new RNUserDefaultsPackage());
    return packages;
}

Usage

import RNUserDefaults from 'rn-user-defaults';
 
RNUserDefaults.set('key', 'value').then(function() {console.log('done')}); // done
RNUserDefaults.get('key').then(function(value) {console.log(value)}); // value
RNUserDefaults.setObjectForKey('objKey', { dog: 1 }).then(function() {console.log('done')}); // done
RNUserDefaults.objectForKey('objKey').then(function(value) {console.log(value)}); // { dog: 1 }

Static methods

Now you can use static methods to access current SharedPreferences or UserDefaults classes on native modules.

Android

import android.content.SharedPreferences;
import chat.rocket.userdefaults.RNUserDefaultsModule;
 
SharedPreferences sharedPreferences = RNUserDefaultsModule.getPreferences();
String exampleString = sharedPreferences.getString("STRING_KEY", "");
 
SharedPreferences sharedPreferences1 = RNUserDefaultsModule.getPreferences(reactApplicationContext);
String exampleString1 = sharedPreferences1.getString("STRING_KEY", "");
 
SharedPreferences sharedPreferences2 = RNUserDefaultsModule.getPreferences(reactApplicationContext, contextName, preferencesName);
String exampleString2 = sharedPreferences2.getString("STRING_KEY", "");

iOS

#import "RNUserDefaults.h"
 
NSDictionary *exampleObject = [[RNUserDefaults getDefaultUser] objectForKey:@"OBJECT_KEY"];

Set a AppGroup on iOS

Add the follow code to your Info.plist

<key>AppGroup</key>
<string>your.group.name</string>

API

function get(key:String):Promise<String>;
function set(key:String, value:String):Promise<Void>;
function setObjectForKey(key:String, value:Object):Promise<Void>;
function objectForKey(key:String):Promise<Object>;
function clear(key:String):Promise<Void>;
function clearAll():Promise<Void>;
 
/**
  Android = getReactApplicationContext().getSharedPreferences(name, Context.MODE_PRIVATE);
**/
function setName(name:String):Promise<Void>;
 
/**
  You can set a context to you sharedPreferences (Android)
**/
function setPackageContext(context:String):Promise<Void>;