我对使用 IGListKit 实现的 CommentsViewController 有一点问题。我创建了一个用于呈现评论的单元格。每个单元格都包含一张图片、文本和一个按钮，可让您标记不当评论或回复评论，类似于在 instagram 中的处理方式。
这是 CollectionVIewCell
import Foundation
import UIKit
import Firebase
protocol CommentCellDelegate: class {
func optionsButtonTapped(cell: CommentCell)
func handleProfileTransition(tapGesture: UITapGestureRecognizer)
}
class CommentCell: UICollectionViewCell {
weak var delegate: CommentCellDelegate? = nil
override var reuseIdentifier : String {
get {
return "cellID"
}
set {
// nothing, because only red is allowed
}
}
var didTapOptionsButtonForCell: ((CommentCell) -> Void)?
var comment: CommentGrabbed?{
didSet{
guard let comment = comment else{
return
}
// print("apples")
// textLabel.text = comment.content
//shawn was also here
profileImageView.loadImage(urlString: comment.user.profilePic!)
// print(comment.user.username)
let attributedText = NSMutableAttributedString(string: comment.user.username!, attributes: [NSAttributedStringKey.font: UIFont.boldSystemFont(ofSize: 14)])
attributedText.append(NSAttributedString(string: " " + (comment.content), attributes: [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 14)]))
textView.attributedText = attributedText
}
}
let textView: UITextView = {
let textView = UITextView()
textView.font = UIFont.systemFont(ofSize: 14)
textView.isScrollEnabled = false
textView.isEditable = false
return textView
}()
lazy var profileImageView: CustomImageView = {
let iv = CustomImageView()
iv.clipsToBounds = true
iv.isUserInteractionEnabled = true
iv.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleProfileTransition)))
iv.contentMode = .scaleAspectFill
return iv
}()
lazy var flagButton: UIButton = {
let flagButton = UIButton(type: .system)
flagButton.setImage(#imageLiteral(resourceName: "icons8-Info-64"), for: .normal)
flagButton.addTarget(self, action: #selector(optionsButtonTapped), for: .touchUpInside)
return flagButton
}()
@objc func optionsButtonTapped (){
didTapOptionsButtonForCell?(self)
}
@objc func onOptionsTapped() {
delegate?.optionsButtonTapped(cell: self)
}
@objc func handleProfileTransition(tapGesture: UITapGestureRecognizer){
delegate?.handleProfileTransition(tapGesture: tapGesture)
// print("Tapped image")
}
override init(frame: CGRect){
super.init(frame: frame)
addSubview(textView)
addSubview(profileImageView)
addSubview(flagButton)
textView.anchor(top: topAnchor, left: profileImageView.rightAnchor, bottom: bottomAnchor, right: rightAnchor, paddingTop: 4, paddingLeft: 4, paddingBottom: 4, paddingRight: 4, width: 0, height: 0)
profileImageView.anchor(top: topAnchor, left: leftAnchor, bottom: nil, right: nil, paddingTop: 8, paddingLeft: 8, paddingBottom: 0, paddingRight: 0, width: 40, height: 40)
profileImageView.layer.cornerRadius = 40/2
flagButton.anchor(top: topAnchor, left: nil, bottom: nil, right: rightAnchor, paddingTop: 4, paddingLeft: 0, paddingBottom: 0, paddingRight: 4, width: 40, height: 40)
flagButton.addTarget(self, action: #selector(CommentCell.onOptionsTapped), for: .touchUpInside)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
现在这个控制器有一个委托方法，允许我在单击按钮时执行一些操作。它允许我展示一个询问回复或标记的警报控制器。当我单击回复时，我希望文本字段使用 @someUserName 自动生成，就像 Instagram 所做的那样，然后我输入一些文本，点击回复，然后发送评论。
下面是我的 CommentSectionController 导入 UIKit 导入 IGListKit 导入 Foundation 导入 Firebase
protocol CommentsSectionDelegate: class {
func CommentSectionUpdared(sectionController: CommentsSectionController)
}
class CommentsSectionController: ListSectionController,CommentCellDelegate {
weak var delegate: CommentsSectionDelegate? = nil
var comment: CommentGrabbed?
let userProfileController = ProfileeViewController(collectionViewLayout: UICollectionViewFlowLayout())
var eventKey: String?
override init() {
super.init()
// supplementaryViewSource = self
//sets the spacing between items in a specfic section controller
inset = UIEdgeInsets(top: 5, left: 0, bottom: 0, right: 0)
}
// MARK: IGListSectionController Overrides
override func numberOfItems() -> Int {
return 1
}
override func sizeForItem(at index: Int) -> CGSize {
let frame = CGRect(x: 0, y: 0, width: collectionContext!.containerSize.width, height: 50)
let dummyCell = CommentCell(frame: frame)
dummyCell.comment = comment
dummyCell.layoutIfNeeded()
let targetSize = CGSize(width: collectionContext!.containerSize.width, height: 55)
let estimatedSize = dummyCell.systemLayoutSizeFitting(targetSize)
let height = max(40+8+8, estimatedSize.height)
return CGSize(width: collectionContext!.containerSize.width, height: height)
}
override var minimumLineSpacing: CGFloat {
get {
return 0.0
}
set {
self.minimumLineSpacing = 0.0
}
}
override func cellForItem(at index: Int) -> UICollectionViewCell {
guard let cell = collectionContext?.dequeueReusableCell(of: CommentCell.self, for: self, at: index) as? CommentCell else {
fatalError()
}
// print(comment)
cell.comment = comment
cell.delegate = self
return cell
}
override func didUpdate(to object: Any) {
comment = object as? CommentGrabbed
}
override func didSelectItem(at index: Int){
}
func optionsButtonTapped(cell: CommentCell){
print("like")
let comment = self.comment
_ = comment?.uid
// 3
let alertController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
// 4
if comment?.uid != User.current.uid {
let flagAction = UIAlertAction(title: "Report as Inappropriate", style: .default) { _ in
ChatService.flag(comment!)
let okAlert = UIAlertController(title: nil, message: "The post has been flagged.", preferredStyle: .alert)
okAlert.addAction(UIAlertAction(title: "Ok", style: .default))
self.viewController?.present(okAlert, animated: true, completion: nil)
}
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
let replyAction = UIAlertAction(title: "Reply to Comment", style: .default, handler: { (_) in
//do something here later to facilitate reply comment functionality
print("Attempting to reply to user \(comment?.user.username) comment")
})
alertController.addAction(replyAction)
alertController.addAction(cancelAction)
alertController.addAction(flagAction)
}else{
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
let deleteAction = UIAlertAction(title: "Delete Comment", style: .default, handler: { _ in
ChatService.deleteComment(comment!, (comment?.eventKey)!)
let okAlert = UIAlertController(title: nil, message: "Comment Has Been Deleted", preferredStyle: .alert)
okAlert.addAction(UIAlertAction(title: "Ok", style: .default))
self.viewController?.present(okAlert, animated: true, completion: nil)
self.onItemDeleted()
})
alertController.addAction(cancelAction)
alertController.addAction(deleteAction)
}
self.viewController?.present(alertController, animated: true, completion: nil)
}
func onItemDeleted() {
delegate?.CommentSectionUpdared(sectionController: self)
}
func handleProfileTransition(tapGesture: UITapGestureRecognizer){
userProfileController.user = comment?.user
if Auth.auth().currentUser?.uid != comment?.uid{
self.viewController?.present(userProfileController, animated: true, completion: nil)
}else{
//do nothing
}
}
}
现在我用来写评论的 textView 在另一个文件中
import UIKit
protocol CommentInputAccessoryViewDelegate {
func handleSubmit(for comment: String?)
}
class CommentInputAccessoryView: UIView, UITextViewDelegate {
var delegate: CommentInputAccessoryViewDelegate?
/*
// Only override draw() if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
override func draw(_ rect: CGRect) {
// Drawing code
}
*/
fileprivate let submitButton: UIButton = {
let submitButton = UIButton(type: .system)
submitButton.setTitle("Submit", for: .normal)
submitButton.setTitleColor(.black, for: .normal)
submitButton.titleLabel?.font = UIFont.boldSystemFont(ofSize: 14)
submitButton.addTarget(self, action: #selector(handleSubmit), for: .touchUpInside)
//submitButton.isEnabled = false
return submitButton
}()
lazy var commentTextView: CommentInputTextView = {
let textView = CommentInputTextView()
// textView.placeholder = "Add a comment"
textView.delegate = self
textView.isScrollEnabled = false
textView.backgroundColor = .white
textView.font = UIFont.boldSystemFont(ofSize: 15)
textView.textContainer.lineBreakMode = .byWordWrapping
// textView.addTarget(self, action: #selector(textFieldDidChange(_:)), for: .editingChanged)
return textView
}()
override init(frame: CGRect) {
super.init(frame: frame)
// backgroundColor = .red
//1
autoresizingMask = .flexibleHeight
addSubview(submitButton)
submitButton.anchor(top: topAnchor, left: nil, bottom: bottomAnchor, right:rightAnchor, paddingTop: 0, paddingLeft: 0, paddingBottom: 0, paddingRight: 12, width: 50, height: 0)
addSubview(commentTextView)
//3
if #available(iOS 11.0, *){
commentTextView.anchor(top: topAnchor, left: leftAnchor, bottom: safeAreaLayoutGuide.bottomAnchor, right: submitButton.leftAnchor, paddingTop: 8, paddingLeft: 8, paddingBottom: 8, paddingRight: 0, width: 0, height: 0)
}else{
//fallback on earlier versions
}
setupLineSeparatorView()
}
// 2
override var intrinsicContentSize: CGSize {
return .zero
}
fileprivate func setupLineSeparatorView(){
let lineSeparatorView = UIView()
lineSeparatorView.backgroundColor = UIColor.rgb(red: 230, green: 230, blue: 230)
addSubview(lineSeparatorView)
lineSeparatorView.anchor(top:topAnchor, left: leftAnchor, bottom: nil, right: rightAnchor, paddingTop: 0, paddingLeft: 0, paddingBottom: 0, paddingRight: 0, width: 0, height: 0.5)
}
@objc func handleSubmit(){
guard let commentText = commentTextView.text else{
return
}
delegate?.handleSubmit(for: commentText)
}
@objc func textFieldDidChange(_ textField: UITextView) {
let isCommentValid = commentTextView.text?.count ?? 0 > 0
if isCommentValid {
submitButton.isEnabled = true
}else{
submitButton.isEnabled = false
}
}
func clearCommentTextField(){
commentTextView.text = nil
commentTextView.showPlaceholderLabel()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
我的问题是如何使用 IGListKit 从我的 commentsSectionController 自动填充 textview 并保持相同的结构，因为我无法从我的 commentsSectionController 访问它