Migrate to Swift 4.

Signal/src/UIStoryboard+OWS.swift

@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//  Copyright (c) 2018 Open Whisper Systems. All rights reserved.
 //
 
 import Foundation
@@ -9,6 +9,7 @@ extension UIStoryboard {
         case main = "Main"
     }
 
+    @objc
     class var main: UIStoryboard {
         return UIStoryboard(name: StoryboardName.main.rawValue, bundle: Bundle.main)
     }

Signal/src/ViewControllers/ContactShareViewHelper.swift

@@ -15,10 +15,12 @@ public protocol ContactShareViewHelperDelegate: class {
 @objc
 public class ContactShareViewHelper: NSObject, CNContactViewControllerDelegate {
 
+    @objc
     weak var delegate: ContactShareViewHelperDelegate?
 
     let contactsManager: OWSContactsManager
 
+    @objc
     public required init(contactsManager: OWSContactsManager) {
         SwiftAssertIsOnMainThread(#function)
 
@@ -89,6 +91,7 @@ public class ContactShareViewHelper: NSObject, CNContactViewControllerDelegate {
         inviteFlow.sendSMSTo(phoneNumbers: phoneNumbers)
     }
 
+    @objc
     func showAddToContacts(contactShare: ContactShareViewModel, fromViewController: UIViewController) {
         Logger.info("\(logTag) \(#function)")
 

Signal/src/ViewControllers/ContactViewController.swift

@@ -48,6 +48,7 @@ class ContactViewController: OWSViewController, ContactShareViewHelperDelegate {
         fatalError("Unimplemented")
     }
 
+    @objc
     required init(contactShare: ContactShareViewModel) {
         contactsManager = Environment.current().contactsManager
         self.contactShare = contactShare

Signal/src/ViewControllers/ContactsPicker.swift

@@ -72,6 +72,7 @@ public class ContactsPicker: OWSViewController, UITableViewDelegate, UITableView
     private lazy var selectedContacts = [Contact]()
 
     // Configuration
+    @objc
     public weak var contactsPickerDelegate: ContactsPickerDelegate?
     private let subtitleCellType: SubtitleCellValue
     private let allowsMultipleSelection: Bool

Signal/src/ViewControllers/ConversationView/ConversationHeaderView.swift

@@ -12,8 +12,10 @@ public protocol ConversationHeaderViewDelegate {
 @objc
 public class ConversationHeaderView: UIStackView {
 
+    @objc
     public weak var delegate: ConversationHeaderViewDelegate?
 
+    @objc
     public var attributedTitle: NSAttributedString? {
         get {
             return self.titleLabel.attributedText
@@ -23,6 +25,7 @@ public class ConversationHeaderView: UIStackView {
         }
     }
 
+    @objc
     public var attributedSubtitle: NSAttributedString? {
         get {
             return self.subtitleLabel.attributedText
@@ -41,14 +44,18 @@ public class ConversationHeaderView: UIStackView {
         }
     }
 
+    @objc
     public let titlePrimaryFont: UIFont =  UIFont.ows_boldFont(withSize: 17)
+    @objc
     public let titleSecondaryFont: UIFont =  UIFont.ows_regularFont(withSize: 9)
-
+    @objc
     public let subtitleFont: UIFont = UIFont.ows_regularFont(withSize: 12)
+
     private let titleLabel: UILabel
     private let subtitleLabel: UILabel
     private let avatarView: AvatarImageView
 
+    @objc
     public required init(thread: TSThread, contactsManager: OWSContactsManager) {
 
         let avatarView = ConversationAvatarImageView(thread: thread, diameter: 36, contactsManager: contactsManager)

Signal/src/ViewControllers/GifPicker/GifPickerViewController.swift

@@ -33,6 +33,7 @@ class GifPickerViewController: OWSViewController, UISearchBarDelegate, UICollect
 
     var lastQuery: String = ""
 
+    @objc
     public weak var delegate: GifPickerViewControllerDelegate?
 
     let thread: TSThread
@@ -60,6 +61,7 @@ class GifPickerViewController: OWSViewController, UISearchBarDelegate, UICollect
         fatalError("\(#function) is unimplemented.")
     }
 
+    @objc
     required init(thread: TSThread, messageSender: MessageSender) {
         self.thread = thread
         self.messageSender = messageSender

Signal/src/ViewControllers/LongTextViewController.swift

@@ -24,6 +24,7 @@ public class LongTextViewController: OWSViewController {
         fatalError("\(#function) is unimplemented.")
     }
 
+    @objc
     public required init(viewItem: ConversationViewItem) {
         self.viewItem = viewItem
 
@@ -76,7 +77,7 @@ public class LongTextViewController: OWSViewController {
         view.addSubview(messageTextView)
         messageTextView.autoPinEdge(toSuperviewEdge: .leading)
         messageTextView.autoPinEdge(toSuperviewEdge: .trailing)
-        messageTextView.textContainerInset = UIEdgeInsetsMake(0, view.layoutMargins.left, 0, view.layoutMargins.right)
+        messageTextView.textContainerInset = UIEdgeInsets(top: 0, left: view.layoutMargins.left, bottom: 0, right: view.layoutMargins.right)
         messageTextView.autoPin(toTopLayoutGuideOf: self, withInset: 0)
 
         let footer = UIToolbar()

Signal/src/ViewControllers/MediaGalleryViewController.swift

@@ -278,6 +278,7 @@ class MediaGalleryViewController: OWSNavigationController, MediaGalleryDataSourc
     // TODO rename to replacingOriginRect
     private var originRect: CGRect?
 
+    @objc
     public func presentDetailView(fromViewController: UIViewController, mediaMessage: TSMessage, replacingView: UIView) {
         var galleryItem: MediaGalleryItem?
         uiDatabaseConnection.read { transaction in

Signal/src/ViewControllers/MessageDetailViewController.swift

@@ -49,6 +49,7 @@ class MessageDetailViewController: OWSViewController, MediaGalleryDataSourceDele
         fatalError("\(#function) is unimplemented.")
     }
 
+    @objc
     required init(viewItem: ConversationViewItem, message: TSMessage, mode: MessageMetadataViewMode) {
         self.contactsManager = Environment.current().contactsManager
         self.viewItem = viewItem

Signal/src/views/QuotedReplyPreview.swift

@@ -23,6 +23,7 @@ class QuotedReplyPreview: UIView {
         fatalError("init(coder:) has not been implemented")
     }
 
+    @objc
     init(quotedReply: OWSQuotedReplyModel) {
         self.quotedReply = quotedReply
 

SignalMessaging/ViewModels/ContactShareViewModel.swift

@@ -48,6 +48,7 @@ public class ContactShareViewModel: NSObject {
         }
     }
 
+    @objc
     public func getAvatarImage(diameter: CGFloat, contactsManager: OWSContactsManager) -> UIImage {
         if let avatarImage = avatarImage {
             return avatarImage

SignalMessaging/Views/DisappearingTimerConfigurationView.swift

@@ -16,6 +16,7 @@ public protocol DisappearingTimerConfigurationViewDelegate: class {
 @objc
 public class DisappearingTimerConfigurationView: UIView {
 
+    @objc
     public weak var delegate: DisappearingTimerConfigurationViewDelegate? {
         didSet {
             // gesture recognizer is only enabled when a delegate is assigned.

SignalMessaging/attachments/SignalAttachment.swift

@@ -1011,6 +1011,7 @@ public class SignalAttachment: NSObject {
         return VideoCompressionResult(attachmentPromise: attachmentPromise, exportSession: exportSession)
     }
 
+    @objc
     public class func isInvalidVideo(dataSource: DataSource, dataUTI: String) -> Bool {
         guard videoUTISet.contains(dataUTI) else {
             // not a video

SignalMessaging/attachments/VideoPlayerView.swift

@@ -7,6 +7,7 @@ import AVFoundation
 
 @objc
 public class VideoPlayerView: UIView {
+    @objc
     var player: AVPlayer? {
         get {
             return playerLayer.player

SignalMessaging/categories/Promise+retainUntilComplete.swift

@@ -1,19 +1,22 @@
 //
-//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//  Copyright (c) 2018 Open Whisper Systems. All rights reserved.
 //
 
 import PromiseKit
 
+@objc
 public extension AnyPromise {
     /**
      * Sometimes there isn't a straight forward candidate to retain a promise, in that case we tell the
      * promise to self retain, until it completes to avoid the risk it's GC'd before completion.
      */
+    @objc
     func retainUntilComplete() {
         // Unfortunately, there is (currently) no way to surpress the
         // compiler warning: "Variable 'retainCycle' was written to, but never read"
         var retainCycle: AnyPromise? = self
         self.always {
+            assert(retainCycle != nil)
             retainCycle = nil
         }
     }
@@ -29,6 +32,7 @@ public extension Promise {
         // compiler warning: "Variable 'retainCycle' was written to, but never read"
         var retainCycle: Promise<T>? = self
         self.always {
+            assert(retainCycle != nil)
             retainCycle = nil
         }
     }

SignalMessaging/environment/migrations/OWS106EnsureProfileComplete.swift

@@ -14,6 +14,7 @@ public class OWS106EnsureProfileComplete: OWSDatabaseMigration {
     private static var sharedCompleteRegistrationFixerJob: CompleteRegistrationFixerJob?
 
     // increment a similar constant for each migration.
+    @objc
     class func migrationId() -> String {
         return "106"
     }