react-native-userdefaults-ios

react-native-userdefaults-ios

React Native Module for NSUserDefaults

This library is especially helpful for hybrid apps that already make use of [NSUserDefaults standardUserDefaults] and would like to read or write to it from within their React components.

Add it to your project

1. Run npm install react-native-userdefaults-ios --save
2. Open your project in XCode, right click on Libraries and click Add Files to "Your Project Name".
3. Select the RNUserDefaults.xcodeproj file in the node_modules/react-native-userdefaults-ios folder and click Add
4. In the Xcode Project Navigator find the RNUserDefaults.xcodproj and add the Products/libRNUserDefaultsIOS.a to Build Phases -> Link Binary With Libraries.
5. Follow the implementation example below...

Example

// Require the library...
var UserDefaults = require('react-native-userdefaults-ios');

Writing to standardUserDefaults

//Set an Array...
var arr = ['1', '2', '3'];
UserDefaults.setArrayForKey(arr, 'keyForMyArray')
    .then(result => {
        console.log(result);
    });
 
// Set a String...
UserDefaults.setStringForKey('myString', 'keyForMyString')
    .then(result => {
        console.log(result);
    });
 
//Set an Object...
var obj = {
    name: 'Dave'
};
UserDefaults.setObjectForKey(obj, 'keyForMyObject')
    .then(result => {
        console.log(result);
    });
 
//Set a boolean value...
UserDefaults.setBoolForKey(true, 'keyForMyBool')
    .then(result => {
        console.log(result);
    });
 
//Remove an item (works for any type)...
UserDefaults.removeItemForKey('keyOfItemToRemove')
    .then(result => {
        console.log(result);
    });

Reading from standardUserDefaults

// Get an array for a given key...
UserDefaults.arrayForKey('keyForMyArray')
    .then(array => {
        //Do something with the returned array...
        array.forEach(item => {
            console.log(item);
        });
    });
 
// Get a string for a given key...
UserDefaults.stringForKey('keyForMyString')
    .then(string => {
        //Do something with the returned string...
        console.log(string);
    });
 
// Get an object for a given key...
UserDefaults.objectForKey('keyForMyObject')
    .then(obj => {
        //Do something with the returned object...
        console.log(obj);
    });
 
// Get a boolean value for a given key...
UserDefaults.boolForKey('keyForMyBool')
    .then(bool => {
        //Do something with the returned boolean value...
        console.log(bool);
    });

Todos for 1.0 release

• Implement dataForKey:
• Implement stringArrayForKey:
• Implement setFloat:forKey:
• Implement floatForKey:
• Implement setInteger:forKey:
• Implement integerForKey:
• Implement setDouble:forKey:
• Implement doubleForKey:
• Implement setURL:forKey:
• Implement URLForKey:
• Implement NSUserDefaultsDidChangeNotification

Todos for 0.1.0 release - DONE!

• Implement arrayForKey:
• Implement stringForKey:
• Implement setObject:forKey:
• Implement objectForKey:
• Implement removeObjectForKey:
• Implement dictionaryForKey: Note: This was taken care of with objectForKey since in JS an Object is a Dictionary in Obj-C
• Implement setBool:forKey:
• Implement boolForKey: