iOS 9 introduced several new features including split screen multitasking on iPad, search APIs, app thinning technologies like bitcode and app slicing, keyboard shortcuts, 3D Touch features, updated UI components like UIAlertController and SFSafariViewController, on demand resources, and the new Contacts framework. It also improved existing technologies like Auto Layout with new syntax and components like UIStackView.

1. What’s new in iOS 9
@adhumi, Trainline
Cocoaheads Paris, jan. 2017

2. →

7. What is already used
(or could be)

8. iPad Multitasking / Split screen & slide over
Gif animé de changement de size class

9. iPad Multitasking / Split screen & slide over
Out of the box ✨
(if you support size classes correctly)

10. iPad Multitasking / Split screen & slide over
<key>UIRequireFullScreen</key>
<true/>
Opt-out (info.plist)

11. Search API
Add content to spotlight
"

12. Search API
NSUserActivity
For current activity indexation (can be public)
var activity = NSUserActivity(activityType: "com.ct.capitainetrain")
activity.title = "Paris → Carpentras"
activity.userInfo = ["id": "www.trainline.fr/results/paris/carpentras"]
activity.isEligibleForSearch = true
"

13. Search API "
let attributeSet = CSSearchableItemAttributeSet(
itemContentType: kUTTypeData)
attributeSet.title = "Private searchable item"
let item = CSSearchableItem(uniqueIdentifier: "AE4F-C8C24D",
domainIdentifier: "domain",
attributeSet: attributeSet)
CSSearchableIndex.default().indexSearchableItems([item],
completionHandler: nil)
CoreSpotlight
For massive and/or private, indexation

14. App thinning / Bitcode & App Slicing
Archive
iTunes Connect
App record
App Store
armv7, arm64
iPhone, iPad
screen density

15. App thinning / Bitcode & App Slicing
Default on iOS (optional)
Mandatory on watchOS and tvOS
⚠ Dependencies need to support Bitcode
~20-50% size gain

16. Keyboard shortcuts

17. Keyboard shortcuts
override var keyCommands: [UIKeyCommand]? {
return [UIKeyCommand(input: "r",
modifierFlags: .command,
action: #selector(onCommandEnter(_:)),
discoverabilityTitle: "Validate")]
}
override var keyCommands: [UIKeyCommand]?

18. 3D Touch / Quick Actions

19. 3D Touch / Quick Actions
let shortcut = UIApplicationShortcutItem(type: "fr.adhumi.app.message",
localizedTitle: "Send message")
UIApplication.shared.shortcutItems = [shortcut]
Dynamic
Static Compile time
Runtime

20. 3D Touch / Peek & Pop
func previewingContext(_ previewingContext: UIViewControllerPreviewing,
commit vc: UIViewController) {
self.navigationController?.pushViewController(vc, animated: true)
}
override func viewDidLoad() {
self.registerForPreviewing(with: self, sourceView: self.view)
}
func previewingContext(_ previewingContext: UIViewControllerPreviewing,
viewControllerForLocation location: CGPoint)
-> UIViewController? {
return MyController()
}

21. What’s really new
and can be adopted

22. UIAlertView
UIActionSheet
↓
UIAlertController

23. UIAlertController

24. UIAlertController
self.present(alert, animated: true, completion: nil)
let alert = UIAlertController(title: "Uh oh!",
message: "An error occured.",
preferredStyle: .alert)
let resolve = UIAlertAction(title: "Resolve",
style: .destructive) { (action) in
// Do stuff
}
alert.addAction(resolve)
let cancel = UIAlertAction(title: "Cancel",
style: .cancel) { (action) in
// Do stuff
}
alert.addAction(cancel)

25. UIWebView
WKWebView
↓
SFSafariViewController

26. SFSafariViewController

27. SFSafariViewController
let url = URL(string: "https://www.trainline.fr")
let safari = SFSafariViewController(url: url!)
self.navigationController?.pushViewController(safari, animated: true)

28. AddressBook.framework
↓
Contacts.framework

29. Contacts.framework
let contacts = CNContactPickerViewController()
contacts.delegate = self
self.present(contacts, animated: true, completion: nil)
func contactPicker(_ picker: CNContactPickerViewController,
didSelect contact: CNContact) {
print(contact.givenName)
print(contact.emailAddresses)
}
let firstName: String = ABRecordCopyValue(contact,
kABPersonFirstNameProperty).takeRetainedValue()

30. App thinning / On Demand Resources
Xcode project
tag-yellow tag-blueNo tag
APP

31. App thinning / On Demand Resources
let tags: Set<String> = ["tag-yellow, tag-blue"]
let request = NSBundleResourceRequest(tags: tags)
request.beginAccessingResources { (error) in
if let error = error {
print(error)
} else {
print("Resources available")
}
}

32. NSLayoutConstraint(item: view1,
attribute: .centerX,
relatedBy: .equal,
toItem: view2,
attribute: .leading,
multiplier: 1,
constant: 0)
↓
view1.centerXAnchor.constraint(equalTo: view2.leadingAnchor)

33. Auto Layout
New syntax
UILayoutGuide
(👋 empty views)
Anchors

34. Auto Layout
UIStackView

35. Auto Layout

36. Auto Layout
let stackView = UIStackView()
stackView.axis = .vertical
stackView.distribution = .equalSpacing
stackView.alignment = .center
stackView.spacing = 8
stackView.addArrangedSubview(logo)
stackView.addArrangedSubview(title)

37. Split screen
Search APIs
Bitcode, App Slicing
Keyboard shortcuts
3D Touch
(peek/pop & quick actions)
Auto Layout
UIAlertController
SFSafariViewController
On Demand Resources
Contacts.framework

38. Thanks! 💚
@adhumi, Trainline 💻 trainline.fr/jobs