(Boring) Things you should know about iOS 9 before launch

1. TL; DR: iOS 9
What you should probably know
by now
Kevin Donnelly, @donnellyk

2. The TL; DR of TL; DR: iOS 9
You get a lot of stuff for free. Not much has broken.

3. TL; DR: iOS 9
1. Boring Stuff
2. Fun Stuff
3. Future Stuff

4. Boring Stuff
That you should definitely check

5. App Transport
Security

6. App Transport Security
In an ideal world, It Just Works™ if
- TSL v1.2
- Certicates signed with SHA256 or better
- RSA 2048/ ECC 256 or better keys)
- Uses Forward Secrecy

7. An SSL error has occurred and a secure connection to
the server cannot be made.
NSUnderlyingError=0x7f88f9436eb0 {Error Domain=kCFErrorDomainCFNetwork Code=-1200
"An SSL error has occurred and a secure connection to the server cannot be made."
UserInfo={NSErrorFailingURLStringKey= https://graph.facebook.com/v2.4,
NSLocalizedRecoverySuggestion= Would you like to connect to the server anyway?,
_kCFNetworkCFStreamSSLErrorOriginalValue=-9802,
kCFStreamPropertySSLPeerCertificates=<CFArray 0x7f88f9536e00...

8. App Transport Security
Audit your app, see where things break1
Keep in mind 3rd-party hosting/APIs/SDKs. All network
connectivity uses these rules2
2
https://developers.facebook.com/docs/ios/ios9
1
https://globalsign.ssllabs.com

10. Disabling ATS per Domain

11. Disabling ATS Everywhere
The ( °□° Approach

12. Disabling ATS Everywhere
Except not really everywhere

13. ATS and Charles (Proxy/Fiddler/
etc)
Edits the build's Info.plist to add ATS Exceptions at build-time
• Add a Run Script build step3
# Add exception for Debug builds
if [ "${CONFIGURATION}" == "Debug" ]
then
# Remove existing exceptions
/usr/libexec/PlistBuddy -c
"Delete :NSAppTransportSecurity:NSExceptionDomains:example.com"
"${CONFIGURATION_BUILD_DIR}/${INFOPLIST_PATH}" 2>/dev/null
exitCode=$? #Supresses failure
/usr/libexec/PlistBuddy -c
"Add :NSAppTransportSecurity:NSExceptionDomains:example.com dict"
"${CONFIGURATION_BUILD_DIR}/${INFOPLIST_PATH}"
/usr/libexec/PlistBuddy -c
"Add :NSAppTransportSecurity:NSExceptionDomains:example.com:NSIncludesSubdomains bool true"
"${CONFIGURATION_BUILD_DIR}/${INFOPLIST_PATH}"
/usr/libexec/PlistBuddy -c
"Add :NSAppTransportSecurity:NSExceptionDomains:example.com:NSTemporaryExceptionAllowsInsecureHTTPLoads bool true"
"${CONFIGURATION_BUILD_DIR}/${INFOPLIST_PATH}"
fi
3
http://product.reverb.com/2015/06/29/ios-9-and-charles-proxy/

14. canOpenURL
Brought to you by Twitter's Biz Dev department

15. canOpenURL
For apps built against iOS 9
You now build a whitelist of URLS you want to be able to call in
Info.plist
<key>LSApplicationQueriesSchemes</key>
<array>
<string>fbapi</string>
<string>fbapi20130214</string>
<string>fbapi20130410</string>
<string>fbapi20140410</string>
<string>fbapi20140116</string>
<string>fbapi20150313</string>
<string>fbapi20150629</string>
<string>fbauth</string>
<string>fbauth2</string>
<string>fb-messenger-api20140430</string>
</array>

16. canOpenURL
For apps built against iOS 9
Calling canOpenURL: for any URL:
- on the whilelist will return YES/NO as normal
- NOT on the whitelist will ALWAYS return NO

17. canOpenURL
For apps built against previous iOS version
• You can call canOpenURL:, as normal, for 50 unique URLS
• On the 51st, it will always return NO.
This does not reset*
*
So they say, app reinstall maybe?

18. Not suppose to change the behavior of openURL:

19. Fun Stuff
That you can probably do now

20. Universal Links

21. Universal Links
Host a JSON file at example.com/apple-app-site-association
{
"applinks": {
"apps": [],
"details": [
{
"appID": "9JA89QQLNQ.com.apple.wwdc",
"paths": [ "/wwdc/news/", "/videos/wwdc/2015/*" ]
},
{
"appID": "TeamID.BundleID2",
"paths": [ "*" ]
}
]
}
}

22. Universal Links

23. Universal Links
func application(application: UIApplication,
continueUserActivity userActivity:
NSUserActivity,
restorationHandler: ([AnyObject]?) -> Void)
-> Bool

24. Search

25. Search
Three distinct systems:
• CoreSpotlight
• NSUserActivity
• Web Markup
NSUserActivity and Core Spotlight is not supported on iPhone 4s, iPad 2, iPad (3rd
generation), iPad mini, and iPod touch (5th generation)

26. Search
Core Spotlight
• Good for when the app has no backend or holds the entire
data set
• Notes, To Do list, Photo library
• Not equivalent to OS X's Spotlight APIs

27. Search
Core Spotlight
• Based on CRUDing CSSearchableItems
• Item described using 'CSSearchableItemAttributeSet'
• .indexSearchableItems on
CSSearchableIndex.defaultSearchableIndex()

28. Search
Core Spotlight
#import <CoreSpotlight/CSSearchableItemAttributeSet_General.h>
#import <CoreSpotlight/CSSearchableItemAttributeSet_Documents.h>
#import <CoreSpotlight/CSSearchableItemAttributeSet_Events.h>
#import <CoreSpotlight/CSSearchableItemAttributeSet_Messaging.h>
#import <CoreSpotlight/CSSearchableItemAttributeSet_Media.h>
#import <CoreSpotlight/CSSearchableItemAttributeSet_Images.h>
#import <CoreSpotlight/CSSearchableItemAttributeSet_Places.h>

29. Search
NSUserActivity
Like Handoffs, sprinkle breadcrumbs throughtout the app
let userActivity = NSUserActivity(activityType: "com.example.thing")
userActivity.title = "Thing"
userActivity.keywords = ["things", "bits", "bops"]
userActivity.eligibleForSearch = true
userActivity.eligibleForPublicIndexing = false
userActivity.becomeCurrent()

31. Search
NSUserActivity
Assign CSSearchableItemAttributeSet
to .contentAttributeSet for richer results

33. Search
Web Markup
• Applebot crawler starts with URL provided in app store
listing
• Markup site using Scheme.org or Open Graph4
• Validate using Apple's tools5
5
https://search.developer.apple.com/appsearch-validation-tool/
4
https://developer.apple.com/library/prerelease/ios/documentation/General/Conceptual/AppSearch/WebContent.html

34. Search
Web Markup
<title>Beats by Dr. Dre...</title>
<meta property="og:description" content="Beats...">
<span itemprop="reviewCount">924</span>
<meta itemprop="ratingValue" content="4.5">
<meta itemprop="priceCurrency" content="USD">

35. iPad Multitasking
• Build against iOS 9 SDK
• Support all orientations on iPad
• Use Launch Storyboard

36. iPad Multitasking
If your use of Auto Layout is relatively sane, It Just Works™
Adaptive Layout will certainly make it better, but not required

37. iPad Multitasking
override func viewWillTransitionToSize(size, coordinator) {
super.viewWillTransitionToSize(size, withTransitionCoordinator: coordinator)
coordinator.animateAlongsideTransition({ (context) -> Void in
// Animate me!!!
}) { (context) -> Void in
// Completion
}
}

38. iPad Multitasking
• UIWindow.bounds not UIScreen.bounds
• Memory will be a tighter, so keep it in mind.
• To completely opt out, add UIRequiresFullscreen:YES to
Info.plist

39. Cool Stuff
That you'll probably have to wait year(s) to use

40. UIStackViews

41. OMG, UIStackViews!

43. UIStackViews
• Handles all the constraints between your views
• Including removing when view.hidden = YES
• Everything is animatable
• Smug Android developers can no longer hold LinearLayout
over us

46. Review
• App Transport Security
• canOpenURL:
• Universal Links
• Search
• iPad Multitasking
• UIStackViews