DemoUniversalLinks

Hits a local Sinatra app to demonstrate handling a universal link from a http redirect.

TL;DR

WKWebView will not launch universal links that occur as part of a http redirect. You must intercept the redirect and call UIApplication.shared.open(url) to trigger the universal link.

func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
    if let url = navigationAction.request.url, url.host == "sso.canvaslms.com" {
        UIApplication.shared.open(url)
        decisionHandler(.cancel)
        return
    }
    decisionHandler(.allow)
}

Setup

Install dependencies.

bundle install

Edit host machine name

Edit DemoUniversalLinks/ViewController.swift to use your machine's name.

// ViewController.swift
- webView.load(URLRequest(url: URL(string: "http://<host name>:8080/redirect")!))
+ webView.load(URLRequest(url: URL(string: "http://mymachine:8080/redirect")!))

You can find your machine name in System Preferences > Sharing.

Start the Server

ruby server.rb

Running the app

Install the Canvas app on your physical device.

Open DemoUniversalLinks.xcodeproj in Xcode 10.2+.

Run the DemoUniversalLinks scheme on your physical device.

Once the app loads, tap Canvas in the top right.

The native Canvas app should launch.

The server log should show a call was made to /redirect.

armstrongnate / DemoUniversalLinks