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Seamless Linking to Your App

πŸ“… 2019.11.20 (WED)

WWDC2015 | Session : 509 | Category : Safari and Web

πŸ”— Seamless Linking to Your App - WWDC 2015 - Videos - Apple Developer

Building Seamless Integration

Linking to Your App

Often web content mirrors app content

An app exists as part of an ecosystem

If your app, or website, needs to access content provided by another app, or website, it needs to communicate with it somehow

Handling URLs in Your App

Custom URL schemes

  • Let apps communicate with each other
  • Don't always map to your app Two apps can claim the same URL scheme
  • Don't work without your app installed
  • Don't protect users' privacy

⬇️⬇️⬇️

  • Let apps communicate with each other just as easily There should be a strong two-way association between your app and your URLs.
  • Securely map to apps you choose
  • Work Universally, fall back to Safari Safari, and web browsers in general, are a great way to display rich content, and are present on nearly every platform, so we'll make sure that these links can open in a web browser.
  • Protect users' privacy There is no need for a third party to be involved.

Breakdown of a Universal Link

https://developer.apple.com/videos/wwdc/2014/?include=101#101

  • Scheme : "https" or "http"
  • Domain(or Host name) : developer.apple.com β†’ The domain is securely associated with your app, by using an SSL certificate to sign a file that is stored on your secure web server.
  • Path or path prefix : /videos/wwdc/2014/ β†’ The path can either match exactly, or it can match with a prefix.

Universal links mean having your app, not Safari, handle links to your website, but in order to get in order to open your app, when a user taps a link to your website, iOS needs to know that your app should open that link.

Getting Your Server Ready

  • Create your "apple-app-site-association" file
  • Generate an SSL certificate
  • Sign your file
  • Upload to your server

UIApplicationDelegate support

    func application(application: UIApplication, continueUserActivity 
    userActivity, NSUserActivity, restorationHandler: ([AnyObject]!) -> Void) ->
    Bool 
    
    var webpageURL: NSURL?
    var activityType: String
    let NSUserActivityTypeBroswingWeb: String

Project Setting β†’ Capabilities tab β†’ select associated domains

Best practices

  • Validate input
  • Fail gracefully
  • Send data over HTTPS

πŸ”— Networking with NSURLSession https://developer.apple.com/videos/play/wwdc2015/711

Linking to Your App

Some advantages of universal links

  • No flashes or bouncing through Safari
  • No code required on your website
  • Graceful fallback to Safari
  • Platform-neutral
  • No extra sever round-trips
  • Full user privacy protection

Smart App Banners

Promote your app from your website

Deploying smart app banners

Add a meta tag to your website's head :

    <head>
    	<meta name="apple-itunes-app" content="app-id=640199958, app- argument=https://developer.apple.com/wwdc/schedule, 
       affiliate- data=optionalAffiliateData">
    </head>

app-argument is passed to application(_:openURL:sourceApplication:annotation:), and is also used to index your app.

Shared Web Credentials

Help your users log into your app

How Safari helps users and you

  • Securely save credentials for users
  • Sync to all devices with iCloud Keychain
  • Suggest secure passwords for users
  • AutoFill saved credentials

Adopting shared web credentials

  • Associate your app and your website
  • Teach your app to ask for Shared Web
  • Credentials