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Attachment List Screen

Overview​

The LMChatAttachmentViewController is responsible for managing the attachment process in a chat interface. It allows users to view, edit, and send various types of media attachments, including images, videos, GIFs, PDFs, and audio files.

File Location:
LMChatAttachmentViewController.swift

Functionality​

Protocols​

LMChatAttachmentViewDelegate​

  • func postConversationWithAttchments(message: String?, attachments: [MediaPickerModel]): allows the delegate to receive the composed message along with an array of MediaPickerModel objects representing the selected attachments.

UI Components​

  • bottomMessageBoxView: A custom view for composing messages and managing attachments.
  • imageViewCarouselContainer: A container view for the media carousel.
  • zoomableImageViewContainer: A container for displaying zoomable images.
  • videoImageViewContainer: A container for video previews.
  • audioPlayer: A view for playing audio attachments.
  • mediaCollectionView: A horizontal collection view displaying attachment thumbnails.
  • mediaDetailLabelContainerStackView: A stack view containing file details for PDFs and audio files.

Properties​

  • delegate: A weak reference to an object conforming to LMChatAttachmentViewDelegate.

Methods​

  • editingImage(_:): Handles the editing of an image attachment.
  • deleteMediaData(_:): Removes the currently selected media attachment.
  • cancelEditing(_:): Cancels the attachment process and dismisses the view controller.
  • addMoreAttachment(): Presents options to add more attachments based on the current media type.
  • sendAttachment(message:): Sends the selected attachments along with an optional message.

Customization​

CustomChatAttachmentViewController.swift
class CustomChatAttachmentViewController: LMChatAttachmentViewController {
    override func setupAppearance() {
        super.setupAppearance()
        view.backgroundColor = .lightGray
    }

    override func addMoreAttachment() {
        // Custom logic for adding more attachments
    }
}
AppDelegate.swift
func application(_ application: UIApplication, willFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil) -> Bool {
    LMUIComponents.shared.chatAttachmentScreen = CustomChatAttachmentViewController.self
    // ...
    return true
}