Add show QR code button to settings

Signal.xcodeproj/project.pbxproj

@@ -560,6 +560,7 @@
 		B8162F0522892C5F00D46544 /* FriendRequestViewDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = B8162F0422892C5F00D46544 /* FriendRequestViewDelegate.swift */; };
 		B821F2F82272CED3002C88C0 /* AccountDetailsViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = B821F2F72272CED3002C88C0 /* AccountDetailsViewController.swift */; };
 		B821F2FA2272CEEE002C88C0 /* SeedViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = B821F2F92272CEEE002C88C0 /* SeedViewController.swift */; };
+		B825848B230F94FE001B41CB /* QRCodeViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = B825848A230F94FE001B41CB /* QRCodeViewController.swift */; };
 		B845B4D4230CD09100D759F0 /* LokiGroupChatPoller.swift in Sources */ = {isa = PBXBuildFile; fileRef = B845B4D3230CD09000D759F0 /* LokiGroupChatPoller.swift */; };
 		B846365B22B7418B00AF1514 /* Identicon+ObjC.swift in Sources */ = {isa = PBXBuildFile; fileRef = B846365A22B7418B00AF1514 /* Identicon+ObjC.swift */; };
 		B89841E322B7579F00B1BDC6 /* NewConversationViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = B89841E222B7579F00B1BDC6 /* NewConversationViewController.swift */; };
@@ -1350,6 +1351,7 @@
 		B8162F0422892C5F00D46544 /* FriendRequestViewDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FriendRequestViewDelegate.swift; sourceTree = "<group>"; };
 		B821F2F72272CED3002C88C0 /* AccountDetailsViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AccountDetailsViewController.swift; sourceTree = "<group>"; };
 		B821F2F92272CEEE002C88C0 /* SeedViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SeedViewController.swift; sourceTree = "<group>"; };
+		B825848A230F94FE001B41CB /* QRCodeViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = QRCodeViewController.swift; sourceTree = "<group>"; };
 		B845B4D3230CD09000D759F0 /* LokiGroupChatPoller.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LokiGroupChatPoller.swift; sourceTree = "<group>"; };
 		B846365A22B7418B00AF1514 /* Identicon+ObjC.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Identicon+ObjC.swift"; sourceTree = "<group>"; };
 		B89841E222B7579F00B1BDC6 /* NewConversationViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NewConversationViewController.swift; sourceTree = "<group>"; };
@@ -2615,6 +2617,7 @@
 				B821F2F92272CEEE002C88C0 /* SeedViewController.swift */,
 				24A830A12293CD0100F4CAC0 /* LokiP2PServer.swift */,
 				B845B4D3230CD09000D759F0 /* LokiGroupChatPoller.swift */,
+				B825848A230F94FE001B41CB /* QRCodeViewController.swift */,
 			);
 			path = Loki;
 			sourceTree = "<group>";
@@ -3647,6 +3650,7 @@
 				4C2F454F214C00E1004871FF /* AvatarTableViewCell.swift in Sources */,
 				346E9D5421B040B700562252 /* RegistrationController.swift in Sources */,
 				340FC8AD204DAC8D007AEB0F /* OWSLinkedDevicesTableViewController.m in Sources */,
+				B825848B230F94FE001B41CB /* QRCodeViewController.swift in Sources */,
 				340FC8AA204DAC8D007AEB0F /* NotificationSettingsViewController.m in Sources */,
 				4C090A1B210FD9C7001FD7F9 /* HapticFeedback.swift in Sources */,
 				3496744F2076ACD000080B5F /* LongTextViewController.swift in Sources */,

Signal/src/Loki/QRCodeViewController.swift

@@ -0,0 +1,39 @@
+
+final class QRCodeViewController : OWSViewController {
+    
+    public override var supportedInterfaceOrientations: UIInterfaceOrientationMask { return .portrait}
+    public override var preferredStatusBarStyle: UIStatusBarStyle { return .lightContent}
+    
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        let stackView = UIStackView(arrangedSubviews: [])
+        stackView.axis = .vertical
+        stackView.spacing = 32
+        stackView.alignment = .center
+        stackView.translatesAutoresizingMaskIntoConstraints = false
+        view.addSubview(stackView)
+        NSLayoutConstraint.activate([
+            stackView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 32),
+            stackView.topAnchor.constraint(equalTo: view.topAnchor, constant: 24),
+            view.trailingAnchor.constraint(equalTo: stackView.trailingAnchor, constant: 32)
+        ])
+        let label = UILabel()
+        label.font = UIFont.ows_dynamicTypeSubheadlineClamped
+        label.text = NSLocalizedString("This is your personal QR code. Other people can scan it to start a secure conversation with you.", comment: "")
+        label.numberOfLines = 0
+        label.textAlignment = .center
+        label.lineBreakMode = .byWordWrapping
+        label.textColor = UIColor.ows_white
+        stackView.addArrangedSubview(label)
+        let imageView = UIImageView()
+        let hexEncodedPublicKey = OWSIdentityManager.shared().identityKeyPair()!.hexEncodedPublicKey
+        let data = hexEncodedPublicKey.data(using: .utf8)
+        let filter = CIFilter(name: "CIQRCodeGenerator")!
+        filter.setValue(data, forKey: "inputMessage")
+        let qrCodeAsCIImage = filter.outputImage!
+        let scaledQRCodeAsCIImage = qrCodeAsCIImage.transformed(by: CGAffineTransform(scaleX: 6.4, y: 6.4))
+        let qrCode = UIImage(ciImage: scaledQRCodeAsCIImage)
+        imageView.image = qrCode
+        stackView.addArrangedSubview(imageView)
+    }
+}

Signal/src/ViewControllers/AppSettings/AppSettingsViewController.m

@@ -239,6 +239,7 @@
 #endif
 
     [section addItem:[OWSTableItem itemWithTitle:NSLocalizedString(@"Share Public Key", @"") actionBlock:^{ [weakSelf sharePublicKey]; }]];
+    [section addItem:[OWSTableItem itemWithTitle:NSLocalizedString(@"Show QR Code", @"") actionBlock:^{ [weakSelf showQRCode]; }]];
     [section addItem:[OWSTableItem itemWithTitle:NSLocalizedString(@"Show Seed", @"") actionBlock:^{ [weakSelf showSeed]; }]];
     [section addItem:[OWSTableItem itemWithTitle:NSLocalizedString(@"Clear All Data", @"") actionBlock:^{ [weakSelf clearAllData]; }]];
     
@@ -503,6 +504,12 @@
     [self presentViewController:shareVC animated:YES completion:nil];
 }
 
+- (void)showQRCode
+{
+    QRCodeViewController *qrCodeVC = [QRCodeViewController new];
+    [self.navigationController pushViewController:qrCodeVC animated:YES];
+}
+
 - (void)showSeed
 {
     NSString *title = NSLocalizedString(@"Your Seed", @"");

Signal/translations/en.lproj/Localizable.strings

@@ -2607,3 +2607,4 @@
 "Update Required" = "Update Required";
 "This version of Loki Messenger is no longer supported. Please press OK to reset your account and migrate to the latest version." = "This version of Loki Messenger is no longer supported. Please press OK to reset your account and migrate to the latest version.";
 "Loki Public Chat" = "Loki Public Chat";
+"Show QR Code" = "Show QR Code";