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Building

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Ben Scheirman benscheirman.com @subdigital

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ficklebits.com

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260+ screencasts on iOS development nsscreencast.com

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What do we do?

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What do we do?

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What can we do?

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What can I do?

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United States Congress House of Representatives Senate 435 Members 100 Members

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5calls.org

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Launch ASAP

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Wanted it to be a GOOD iOS app

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github.com/5calls/ios

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Let people help you!

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Built on NSOperation Storyboards UITableView CocoaPods Vibrancy / Blur Dynamic Type Custom UIViewController Containment Local Push Notifications Fastlane Pantry Swift 3 Universal app
 (split view) Fabric / Crashlytics R.swift Buddybuild

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NSOperations class BaseOperation : Operation { override var isAsynchronous: Bool { return true } 
 private var _executing = false { willSet { willChangeValue(forKey: "isExecuting") } didSet { didChangeValue(forKey: "isExecuting") } } override var isExecuting: Bool { return _executing } private var _finished = false { willSet { willChangeValue(forKey: "isFinished") } didSet { didChangeValue(forKey: "isFinished") } } override var isFinished: Bool { return _finished } class BaseOperation : Operation { func execute() { fatalError("You must override this") } func finish() { _executing = false _finished = true } }

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NSOperations class FetchIssuesOperation : BaseOperation { let location: UserLocation? init(location: UserLocation?) { self.location = location }
 
 ... }

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NSOperations override func execute() { let task = session.dataTask(with: url) { 
 (data, response, error) in if let e = error { print("Error fetching issues: \ (e.localizedDescription)”) } else { self.handleResponse(data: data, response: response) } self.finish() } task.resume() }

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NSOperations self.issuesList = IssuesList(dictionary: json)

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NSOperations func fetchIssues(completion: @escaping (IssuesLoadResult) -> Void) { let operation = FetchIssuesOperation(location: userLocation) operation.completionBlock = { [weak self, weak operation] in if let issuesList = operation?.issuesList { self?.issuesList = issuesList DispatchQueue.main.async { completion(.success) } } else {
 // …
 }
 
 } OperationQueue.main.addOperation(operation) }

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NSOperations FetchIssuesOperation FetchStatsOperation ReportOutcomeOperation

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NSOperations Composable Dependencies Cancellable Control Concurrency Quality of Service

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NSOperations https://developer.apple.com/videos/play/wwdc2015/226/ WWDC Session 226 - Advanced NSOperations http://nsscreencast.com/ NSScreencast Episodes 175-177, 180

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Dynamic Type Dynamic Type Dynamic Type

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Using a custom font made this more difficult

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Getting Dynamic Type to work with UITableViewCells Define height with constraints

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Getting Dynamic Type to work with UITableViewCells

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Respond to Dynamic Type Changes UIContentSizeCategoryDidChangeNotification adjustsFontsForContentSizeCategory iOS 10.0

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Getting dynamic fonts in code headline.font = UIFont.preferredFont( forTextStyle: UIFontTextStyleHeadline) subhead.font = UIFont.preferredFont( forTextStyle: UIFontTextStyleSubheadline) body.font = UIFont.preferredFont( forTextStyle: UIFontTextStyleBody)

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https://github.com/nickoneill/Pantry if let available: Bool = Pantry.unpack("promptAvailable") { completion(available: available) } else { anExpensiveOperationToDetermineAvailability({ (available) -> () in Pantry.pack(available, key: "promptAvailable", expires: .Seconds(60 * 10)) completion(available: available) }) }

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var autopersist: String? { set { if let newValue = newValue { Pantry.pack(newValue, key: "autopersist") } } get { return Pantry.unpack("autopersist") } } ...later... autopersist = "Hello!" // restart app, reboot phone, etc print(autopersist) // Hello!

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SIMPLE MODEL OBJECT…

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CONFORM TO STORABLE

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USAGE IS REALLY SIMPLE:

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CAREFUL YOU DON’T STORE USER DATA IN CACHES

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R.swift

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R.swift let icon = UIImage(named: "settings-icon") let icon = R.image.settingsIcon() becomes…

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R.swift let viewController = CustomViewController(nibName: "CustomView", bundle: nil) let viewController = CustomViewController(nib: R.nib.customView) becomes…

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R.swift let string = String(format: NSLocalizedString("welcome.withName", comment: ""), 
 locale: NSLocale.current, "Arthur Dent") let string = R.string.localizable.welcomeWithName("Arthur Dent") becomes…

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R.swift

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# Fastfile 
 desc "Runs all the tests" lane :test do scan(workspace: workspace, scheme: scheme) end

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$ fastlane test

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desc "Increments build number" lane :increment_build do increment_build_number(xcodeproj: xcodeproj) end

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desc "Submit a new Beta Build to Apple TestFlight" lane :beta do ensure_git_status_clean increment_build commit_version_bump badge(shield: "Version-#{app_version}-red", shield_no_resize: true) gym(workspace: workspace, scheme: scheme) changelog = prompt_for_release_notes pilot(changelog: changelog) git_commit(path: 'fastlane/changelog.txt', message: 'Updated changelog.txt') reset_git_repo(files: app_icon_files) add_git_tag push_git_tags end

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desc "Submit a new Beta Build to Apple TestFlight" lane :beta do ensure_git_status_clean increment_build commit_version_bump badge(shield: "Version-#{app_version}-red", shield_no_resize: true) gym(workspace: workspace, scheme: scheme) changelog = prompt_for_release_notes pilot(changelog: changelog) git_commit(path: 'fastlane/changelog.txt', message: 'Updated changelog.txt') reset_git_repo(files: app_icon_files) add_git_tag push_git_tags end

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desc "Submit a new Beta Build to Apple TestFlight" lane :beta do ensure_git_status_clean increment_build commit_version_bump badge(shield: "Version-#{app_version}-red", shield_no_resize: true) gym(workspace: workspace, scheme: scheme) changelog = prompt_for_release_notes pilot(changelog: changelog) git_commit(path: 'fastlane/changelog.txt', message: 'Updated changelog.txt') reset_git_repo(files: app_icon_files) add_git_tag push_git_tags end

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desc "Submit a new Beta Build to Apple TestFlight" lane :beta do ensure_git_status_clean increment_build commit_version_bump badge(shield: "Version-#{app_version}-red", shield_no_resize: true) gym(workspace: workspace, scheme: scheme) changelog = prompt_for_release_notes pilot(changelog: changelog) git_commit(path: 'fastlane/changelog.txt', message: 'Updated changelog.txt') reset_git_repo(files: app_icon_files) add_git_tag push_git_tags end

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desc "Submit a new Beta Build to Apple TestFlight" lane :beta do ensure_git_status_clean increment_build commit_version_bump badge(shield: "Version-#{app_version}-red", shield_no_resize: true) gym(workspace: workspace, scheme: scheme) changelog = prompt_for_release_notes pilot(changelog: changelog) git_commit(path: 'fastlane/changelog.txt', message: 'Updated changelog.txt') reset_git_repo(files: app_icon_files) add_git_tag push_git_tags end

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def prompt_for_release_notes `open changelog.txt -W` File.read('changelog.txt') end

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desc "Submit a new Beta Build to Apple TestFlight" lane :beta do ensure_git_status_clean increment_build commit_version_bump badge(shield: "Version-#{app_version}-red", shield_no_resize: true) gym(workspace: workspace, scheme: scheme) changelog = prompt_for_release_notes pilot(changelog: changelog) git_commit(path: 'fastlane/changelog.txt', message: 'Updated changelog.txt') reset_git_repo(files: app_icon_files) add_git_tag push_git_tags end

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desc "Submit a new Beta Build to Apple TestFlight" lane :beta do ensure_git_status_clean increment_build commit_version_bump badge(shield: "Version-#{app_version}-red", shield_no_resize: true) gym(workspace: workspace, scheme: scheme) changelog = prompt_for_release_notes pilot(changelog: changelog) git_commit(path: 'fastlane/changelog.txt', message: 'Updated changelog.txt') reset_git_repo(files: app_icon_files) add_git_tag push_git_tags end

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Automatic Screenshots # Snapfile devices([
 "iPhone 7"
 "iPhone 7 Plus",
 "iPhone SE",
 "iPad Pro (12.9 inch)"
 ]) languages(["en-US"])
 
 workspace "./FiveCalls/FiveCalls.xcworkspace"
 scheme "FiveCallsUITests" output_directory "./screenshots"
 clear_previous_screenshots true
 launch_arguments(["-hasShownWelcomeScreen false"])

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Automatic Screenshots

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Deterministic Data? How do we ALWAYS choose the same item, despite the server changing?

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Stubs! {
 “issues”: [
 … ] 
 } issues.json INTERNET GET /issues UI TESTING? YES NO

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SeededURLSession SeededDataTask dataTask(with:completion:)

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HOST APP TESTS ENV

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TESTS

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The Stats

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Week 1 6,300 downloads

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Month 1 76,916 downloads

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All Time (4/21/2017) 105,000 downloads

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44.2k Monthly Active Users 2.4k Daily Active Users

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Over 1 million calls to congress

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Final Thoughts

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!

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Track Useful Analytics *but don’t be scummy

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REDMAP

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Software Development is an incredibly valuable skill.

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Software Development is an incredibly valuable skill. Use your powers for good, not evil.

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Ben Scheirman benscheirman.com @subdigital nsscreencast.com ¡Gracias!