Fix iOS 11 Navigation Issue

.travis.yml

@@ -13,11 +13,12 @@ before_install:
 install:
   - bundle install --jobs=3 --retry=3 --deployment
   - bundle exec pod install --project-directory=Example
+before_script:
+  - if [ -n "$DANGER_GITHUB_API_TOKEN" ]; then bundle exec danger; else echo "Missing DANGER_GITHUB_API_TOKEN"; fi
 script:
   - make -B test
   - make -B carthage
   - make -B docs
-  - bundle exec danger
 notifications:
   email: false
   slack:

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 * Drop iOS 8 support [#13](https://github.com/carousell/pickle/pull/13)
 * Rename `imagePickerController(_:didDeselectImageAsset:)` [#12](https://github.com/carousell/pickle/pull/12)
+* Workaround the navigation issue in iOS 11 when the Photos permission is denied [#18](https://github.com/carousell/pickle/pull/18)
 
 ## v1.1.0
 

Pickle.xcworkspace

@@ -0,0 +1 @@
+Example/Pickle.xcworkspace

Pickle/Classes/ImagePickerController.swift

@@ -111,6 +111,7 @@ open class ImagePickerController: UINavigationController {
     open override var title: String? {
         didSet {
             albumButton.title = title
+            albumButton.isHidden = title?.isEmpty ?? true
         }
     }
 
@@ -239,8 +240,8 @@ extension ImagePickerController: UIImagePickerControllerDelegate, UINavigationCo
     public func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
         switch PHPhotoLibrary.authorizationStatus() {
         case .denied, .restricted:
-            picker.dismiss(animated: false) {
-                self.cancel(nil)
+            picker.dismiss(animated: false) { [weak self] in
+                self?.cancel(nil)
             }
         default:
             picker.dismiss(animated: true, completion: nil)
@@ -351,6 +352,14 @@ fileprivate extension ImagePickerController {
             galleryViewController = PhotoGalleryViewController(album: cameraRoll.firstObject, configuration: configuration)
 
         case .denied, .restricted:
+            // Workaround the issue in iOS 11 where UIImagePickerController doesn't show the permission denied message.
+            // It requires additional PHAuthorizationStatus check before presenting Pickle.ImagePickerController.
+            if #available(iOS 11.0, *) {
+                // Hide the album button and display an empty gallery with a cancel button to dismiss the image picker.
+                title = nil
+                galleryViewController = PhotoGalleryViewController()
+                return
+            }
             let controller = systemPhotoLibraryController
             showPermissionErrorIfNeeded = { [weak self] in
                 self?.present(controller, animated: false, completion: {