React Native app purely in Swift

Question

I created my first react native app using the following command.

react-native init PropertyFinder

This created a project for ios in Objective-C. The problem is I don't know Objective-C but I work on Swift.

This gist shows how to link react-components to a swift project. But is there a way to directly create the project in Swift language?

Answer 1

This excellent post helped me solving the problem.

Solution

1. Add Bridging Header

#import "RCTBridgeModule.h"
#import "RCTBridge.h"
#import "RCTEventDispatcher.h"
#import "RCTRootView.h"
#import "RCTUtils.h"
#import "RCTConvert.h"

2. Add AppDelegate.Swift

var bridge: RCTBridge!

  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    /**
     * Loading JavaScript code - uncomment the one you want.
     *
     * OPTION 1
     * Load from development server. Start the server from the repository root:
     *
     * $ npm start
     *
     * To run on device, change `localhost` to the IP address of your computer
     * (you can get this by typing `ifconfig` into the terminal and selecting the
     * `inet` value under `en0:`) and make sure your computer and iOS device are
     * on the same Wi-Fi network.
     */

    let jsCodeLocation = NSURL(string: "http://localhost:8081/index.ios.bundle?platform=ios&dev=true")

    /**
     * OPTION 2
     * Load from pre-bundled file on disk. The static bundle is automatically
     * generated by "Bundle React Native code and images" build step.
     */

    // jsCodeLocation = NSBundle.mainBundle().URLForResource("main", withExtension: "jsbundle")

    let rootView = RCTRootView(bundleURL:jsCodeLocation as URL!, moduleName: "PropertyFinder", initialProperties: nil, launchOptions:launchOptions)

    self.bridge = rootView?.bridge

    self.window = UIWindow(frame: UIScreen.main.bounds)
    let rootViewController = UIViewController()

    rootViewController.view = rootView

    self.window!.rootViewController = rootViewController;
    self.window!.makeKeyAndVisible()

    return true
  }

3. Remove the AppDelegate.h, AppDelegate.m and the main file.

4. Clean and build your project.