Thursday lab

[robert-hatfield]

User Stories (MVP)

• As a developer, I want to utilize UIKit to build out an application to help work towards a better understanding of Apple's primary UI framework.
• As a developer, I want to use gestures in my application, to provide additional "surprise and delight" to my users.
• As a user, I want to be able to post the image I filter to Twitter, to share with my followers.
• As a user, I want to see each photo pre-filtered before applying it to my image, to better understand what each filter does.

Technical Requirements

• Implement collection view on the HomeViewController to display all available filters already pre-applied to the image.
• Create an additional UICollectionViewCell subclass that has a label to display info about the filter being previewed.
• Show / Hide filterCollectionView in place of Action Sheet.
• Selecting a filtered image applies that filter to the current Image in the primary image view.
• Implement a pinch gesture recognizer on GalleryViewController, that affects the collection view layout.
• Create a custom protocol and use delegation to send back the image selected from FiltersPreviewViewController to the HomeViewController for editing.
• Use SLComposeViewController to share images to one of the supported social networks.
• If you didn't complete in class 13 lab, refactor the HomeViewController to make the UIAlertController logic more DRY.
• Rewrite the imagePickerControllerDelegate methods to be in an extension.
• Use the //MARK: comments to make it easier to navigate your code.

Stretch Goal:

• Alter the existing post button, or add another one, that allows the user to choose whether they post the filtered images to CloudKit in the public database or private database. Following this, you should implement a 3rd tab on the tabBarController that displays all the images posted to the public database, as a feed.

[robert-hatfield]

Resolves #9