Using Web Screenlet with Cordova in Your iOS App

By using Cordova plugins in Web Screenlet, you can extend the functionality of the web page that the Screenlet renders. This lets you tailor that page to your app’s needs. You’ll get started by installing Cordova.

Installing and Configuring Cordova Automatically

Follow these steps to automatically create an empty Android project configured to use Cordova. Note that you must have git, Node.js and npm, and CocoaPods installed.

  1. Install screens-cli:

    npm install -g screens-cli
    
  2. Create the file .plugins.screens in the folder you want to create your project in. In this file, add all the Cordova plugins you want to use in your app. For example, you can add plugins from Cordova or GitHub:

    https://github.com/apache/cordova-plugin-wkwebview-engine.git
    cordova-plugin-call-number
    cordova-plugin-camera
    

    Note that the WKWebView Engine plugin is mandatory in iOS.

  3. In the folder containing your .plugins.screens file, run screens-cli to create your project:

    screens-cli ios <project-name>
    

    This creates your project in the folder platforms/ios/<project-name>.

  4. Run the following in platforms/ios/<project-name>:

    pod install
    
  5. Open the <project-name>.xcworkspace file with Xcode.

Installing and Configuring Cordova Manually

Follow these steps to install and configure Cordova:

  1. Follow the Cordova getting started guide to install Cordova, create a Cordova project, and add the iOS platform to your Cordova project.

  2. Install the Cordova WKWebView engine:

    cordova plugin add cordova-plugin-wkwebview-engine
    
  3. Install any other Cordova plugins you want to use in your app. You can use cordova plugin to view the currently installed plugins.

  4. Copy the following files and folders from your Cordova project to your iOS project’s root folder:

    • platforms/ios/<your-cordova-project>/config.xml
    • platforms/ios/<your-cordova-project>/Plugins
    • platforms/ios/www
  5. In the config.xml file you just copied to your iOS project’s root folder, add <allow-navigationhref="*" /> below <access origin="*" />.

Using Cordova in Web Screenlet

Now that you’ve installed and configured Cordova in your iOS project, you’re ready to use it with Web Screenlet. Follow these steps to do so:

  1. Insert and configure Web Screenlet in your app.

  2. When you set Web Screenlet’s parameters via the WebScreenletConfigurationBuilder object, call the enableCordova() method. For example, this code adds a local JavaScript file via addJs and then calls enableCordova() before loading the configuration and the Screenlet:

    let configuration = WebScreenletConfigurationBuilder(url: "url")
        .addJs(localFile: "call")
        .enableCordova()
        .load()
    
    webScreenlet?.configuration = configuration
    webScreenlet?.load();
    

That’s it! Note, however, that you may also need to invoke Cordova from a JavaScript file, depending on what you’re doing. For example, to use the Cordova plugin cordova-plugin-call-number to call a number, then you must add a JavaScript file with the following code:

function callNumber() {
    //This line triggers the Cordova plugin and makes a call
    window.plugins.CallNumber.callNumber(null, function(){ alert("Calling failed.") }, "900000000", true);
}

setTimeout(callNumber, 3000);

If you run the app containing this code and wait three seconds, the plugin activates and calls the number in the JavaScript file.

Great! Now you know how to use Web Screenlet with Cordova.

Rendering Web Pages in Your iOS App

Web Screenlet for iOS

« Rendering Web Pages in Your iOS AppiOS Best Practices »
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