NEBaseLocalConversationController 为本地会话列表的实现类，内部包含本地会话相关的回调，具体如下:

Swift// MARK: ================= LocalConversationViewModelDelegate===================

extension NEBaseLocalConversationController: LocalConversationViewModelDelegate {
  open func reloadData() {
    delegate?.onDataLoaded()
  }
    
  /// 带排序的刷新
  open func reloadTableView() {
    if viewModel.stickTopConversations.count <= 0, viewModel.conversationListData.count <= 0 {
      emptyView.isHidden = false
    } else {
      emptyView.isHidden = true
    }
    viewModel.conversationListData.sort()
    viewModel.stickTopConversations.sort()
    tableView.reloadData()
  }

  /// 由于数据变更可能导致底部有更多数据，此方法重新使列表加载更多能力开启
  public func loadMoreStateChange(_ finish: Bool) {
    if finish {
      tableView.mj_footer = nil
    } else {
      tableView.mj_footer = MJRefreshBackNormalFooter(
        refreshingTarget: self,
        refreshingAction: #selector(loadMoreData)
      )
    }
  }
}

NEBaseConversationController 为云端会话列表的实现类，内部包含云端会话相关的回调，具体如下:

Swift// MARK: ================= ConversationViewModelDelegate===================

extension NEBaseConversationController: ConversationViewModelDelegate {
  open func reloadData() {
    delegate?.onDataLoaded()
  }
    
  /// 带排序的刷新
  open func reloadTableView() {
    if viewModel.stickTopConversations.count <= 0, viewModel.conversationListData.count <= 0 {
      emptyView.isHidden = false
    } else {
      emptyView.isHidden = true
    }
    viewModel.conversationListData.sort()
    viewModel.stickTopConversations.sort()
    tableView.reloadData()
  }

  /// 由于数据变更可能导致底部有更多数据，此方法重新使列表加载更多能力开启
  public func loadMoreStateChange(_ finish: Bool) {
    if finish {
      tableView.mj_footer = nil
    } else {
      tableView.mj_footer = MJRefreshBackNormalFooter(
        refreshingTarget: self,
        refreshingAction: #selector(loadMoreData)
      )
    }
  }
}

1. 继承 LocalConversationListCell 类，实现自定义单元格，对数据进行展示。

Swiftopen class CustomLocalConversationListCell: LocalConversationListCell {
  // 新增 UI 元素，用于展示在线状态
  private lazy var onlineView: UIImageView = {
    let notify = UIImageView()
    notify.translatesAutoresizingMaskIntoConstraints = false
    notify.image = UIImage(named: "about_yunxin")
    return notify
  }()

  override public init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
    super.init(style: style, reuseIdentifier: reuseIdentifier)

    // 头像右下角
    contentView.addSubview(onlineView)
    NSLayoutConstraint.activate([
      onlineView.rightAnchor.constraint(equalTo: headImge.rightAnchor),
      onlineView.bottomAnchor.constraint(equalTo: headImge.bottomAnchor),
      onlineView.widthAnchor.constraint(equalToConstant: 12),
      onlineView.heightAnchor.constraint(equalToConstant: 12),
    ])
  }

  public required init?(coder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
  }

  // 此方法用于数据和 UI 的绑定，可在此处在数据展示前对数据进行处理
  open func configureData(_ sessionModel: NELocalConversationListModel?) {
    super.configureData(sessionModel)
//    subTitle.text = "[自定义类型文案]"
  }
}

2. 继承 LocalConversationController 类，实现自定义表格（以通用皮肤为例）。

Swiftopen class CustomLocalConversationController: LocalConversationController, NEBaseLocalConversationControllerDelegate {
  override public init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
    super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
    delegate = self

    // 自定义 cell, [NELocalConversationListModel.customType: 需要注册的自定义 UI 类型]
    // 自定义 cell 的注册字典需要在 viewDidLoad 之前完成初始化
    cellRegisterDic[1] = CustomLocalConversationListCell.self
  }

  public required init?(coder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
  }

  override open func viewDidLoad() {
    super.viewDidLoad()
  }

  override open func deleteActionHandler(action: UITableViewRowAction, indexPath: IndexPath) {
    showSingleAlert(message: "override deleteActionHandler") {}
  }

  override open func topActionHandler(action: UITableViewRowAction, indexPath: IndexPath, isTop: Bool) {
    showSingleAlert(message: "override topActionHandler") {
      super.topActionHandler(action: action, indexPath: indexPath, isTop: isTop)
    }
  }

  //  父类加载完数据后会调用此方法，可在此对数据进行二次处理
  public func onDataLoaded() {
    guard let conversationList = viewModel.conversationListArray else { return
    }
    conversationList.forEach { model in
      model.customType = 1
    }
    tableView.reloadData()
  }
}

注意： onDataLoaded 方法调用时，表明父类已完成数据的加载，数据存放在 viewModel.conversationListArray 列表中，数据模型定义如下：

Swift/* 
    本地会话列表数据模型 NELocalConversationListModel
    // customType: 自定义 UI 类型，其在注册本地会话列表 cell 时作为 key 与自定义 cell 进行绑定
    // localExtension: 本地扩展字段，可根据业务需求添加数据，与 customType 结合可实现多种自定义 cell 的展示
*/
@objcMembers
public class NELocalConversationListModel: NSObject, Comparable {
/// 会话
public var conversation: V2NIMLocalConversation?
/// 自定义类型
public var customType = 0
}

1. 继承 ConversationListCell 类，实现自定义单元格，对数据进行展示。

Swiftopen class CustomConversationListCell: ConversationListCell {
  // 新增 UI 元素，用于展示在线状态
  private lazy var onlineView: UIImageView = {
    let notify = UIImageView()
    notify.translatesAutoresizingMaskIntoConstraints = false
    notify.image = UIImage(named: "about_yunxin")
    return notify
  }()

  override public init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
    super.init(style: style, reuseIdentifier: reuseIdentifier)

    // 头像右下角
    contentView.addSubview(onlineView)
    NSLayoutConstraint.activate([
      onlineView.rightAnchor.constraint(equalTo: headImge.rightAnchor),
      onlineView.bottomAnchor.constraint(equalTo: headImge.bottomAnchor),
      onlineView.widthAnchor.constraint(equalToConstant: 12),
      onlineView.heightAnchor.constraint(equalToConstant: 12),
    ])
  }

  public required init?(coder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
  }

  // 此方法用于数据和 UI 的绑定，可在此处在数据展示前对数据进行处理
  open func configureData(_ sessionModel: NEConversationListModel?) {
    super.configureData(sessionModel)
//    subTitle.text = "[自定义类型文案]"
  }
}

2. 继承 ConversationController 类，实现自定义表格（以通用皮肤为例）。

Swiftopen class CustomConversationController: ConversationController, NEBaseConversationControllerDelegate {
  override public init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
    super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
    delegate = self

    // 自定义 cell, [NEConversationListModel.customType: 需要注册的自定义 UI 类型]
    // 自定义 cell 的注册字典需要在 viewDidLoad 之前完成初始化
    cellRegisterDic[1] = CustomConversationListCell.self
  }

  public required init?(coder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
  }

  override open func viewDidLoad() {
    super.viewDidLoad()
  }

  override open func deleteActionHandler(action: UITableViewRowAction, indexPath: IndexPath) {
    showSingleAlert(message: "override deleteActionHandler") {}
  }

  override open func topActionHandler(action: UITableViewRowAction, indexPath: IndexPath, isTop: Bool) {
    showSingleAlert(message: "override topActionHandler") {
      super.topActionHandler(action: action, indexPath: indexPath, isTop: isTop)
    }
  }

  //  父类加载完数据后会调用此方法，可在此对数据进行二次处理
  public func onDataLoaded() {
    guard let conversationList = viewModel.conversationListArray else { return
    }
    conversationList.forEach { model in
      model.customType = 1
    }
    tableView.reloadData()
  }
}

注意： onDataLoaded 方法调用时，表明父类已完成数据的加载，数据存放在 viewModel.conversationListArray 列表中，数据模型定义如下：

swift/* 
    云端会话列表数据模型 NEConversationListModel
    // customType: 自定义 UI 类型，其在注册云端会话列表 cell 时作为 key 与自定义 cell 进行绑定
    // localExtension: 本地扩展字段，可根据业务需求添加数据，与 customType 结合可实现多种自定义 cell 的展示
*/
@objcMembers
public class NEConversationListModel: NSObject, Comparable {
/// 会话
public var conversation: V2NIMConversation?
/// 自定义类型
public var customType = 0
}

Swiftopen class CustomLocalConversationController: LocalConversationController {
  override public func viewDidLoad() {
    // 实现协议（重写 tabbar 点击事件）
    navigationView.delegate = self

    // 自定义本地会话列表标题、图标、间距
    navigationView.brandBtn.setTitle("消息", for: .normal)
    navigationView.brandBtn.setImage(nil, for: .normal)
    navigationView.brandBtn.layoutButtonImage(style: .left, space: 0)

    // 自定义添加按钮图标
    navigationView.addBtn.setImage(UIImage.ne_imageNamed(name: "noNeed_notify"), for: .normal)

    ...

    super.viewDidLoad()
  }

  // 通过继承方式重写次最右侧按钮点击事件, 这种方式会覆盖配置项中的点击事件
  override open func searchAction() {
    // searchAction
  }

  // 通过继承方式重写最右侧按钮点击事件, 这种方式会覆盖配置项中的点击事件
  override open func didClickAddBtn() {
    showSingleAlert(message: "override didClickAddBtn") {
      // didClickAddBtn
    }
  }
}

Swiftopen class CustomConversationController: ConversationController {
  override public func viewDidLoad() {
    // 实现协议（重写 tabbar 点击事件）
    navigationView.delegate = self

    // 自定义云端会话列表标题、图标、间距
    navigationView.brandBtn.setTitle("消息", for: .normal)
    navigationView.brandBtn.setImage(nil, for: .normal)
    navigationView.brandBtn.layoutButtonImage(style: .left, space: 0)

    // 自定义添加按钮图标
    navigationView.addBtn.setImage(UIImage.ne_imageNamed(name: "noNeed_notify"), for: .normal)

    ...

    super.viewDidLoad()
  }

  // 通过继承方式重写次最右侧按钮点击事件, 这种方式会覆盖配置项中的点击事件
  override open func searchAction() {
    // searchAction
  }

  // 通过继承方式重写最右侧按钮点击事件, 这种方式会覆盖配置项中的点击事件
  override open func didClickAddBtn() {
    showSingleAlert(message: "override didClickAddBtn") {
      // didClickAddBtn
    }
  }
}

Swiftpublic class CustomView: UIView {
  public let btn = UIButton()

  override public init(frame: CGRect) {
    super.init(frame: frame)
    btn.translatesAutoresizingMaskIntoConstraints = false
    btn.addTarget(self, action: #selector(tapView), for: .touchUpInside)
    btn.setTitle("按钮", for: .normal)
    btn.backgroundColor = .red
    addSubview(btn)
    NSLayoutConstraint.activate([
      btn.topAnchor.constraint(equalTo: topAnchor),
      btn.bottomAnchor.constraint(equalTo: bottomAnchor),
      btn.widthAnchor.constraint(equalToConstant: 200),
      btn.centerXAnchor.constraint(equalTo: centerXAnchor),
    ])
  }

  required init?(coder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
  }

  @objc func tapView() {
    print("点击了自定义按钮")
  }
}

open class CustomLocalConversationController: LocalConversationController {
  public lazy var customTopView: CustomView = {
    let view = CustomView(frame: CGRect(x: 0, y: 10, width: NEConstant.screenWidth, height: 40))
    view.backgroundColor = .blue
    return view
  }()

  override public init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
    super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
  }

  public required init?(coder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
  }

  override public func viewDidLoad() {
    // 顶部 bodyTopView 中添加自定义 view（需要设置 bodyTopView 的高度）
    customTopView.btn.setTitle("通过重写方式添加", for: .normal)
    bodyTopView.addSubview(customTopView)
    bodyTopViewHeight = 80

    // 自定义占位图文案、背景图片
    emptyView.setEmptyImage(image: UIImage())
    emptyView.settingContent(content: "")
    ...
    super.viewDidLoad()
  }

  // 通过继承方式重写次最右侧按钮点击事件, 这种方式会覆盖配置项中的点击事件
override open func searchAction() {
  bodyTopViewHeight = 80
  bodyBottomViewHeight = 80
}

// 通过继承方式重写最右侧按钮点击事件, 这种方式会覆盖配置项中的点击事件
override open func didClickAddBtn() {
  bodyTopViewHeight = 0
  bodyBottomViewHeight = 0
}
}

Swiftpublic class CustomView: UIView {
  public let btn = UIButton()

  override public init(frame: CGRect) {
    super.init(frame: frame)
    btn.translatesAutoresizingMaskIntoConstraints = false
    btn.addTarget(self, action: #selector(tapView), for: .touchUpInside)
    btn.setTitle("按钮", for: .normal)
    btn.backgroundColor = .red
    addSubview(btn)
    NSLayoutConstraint.activate([
      btn.topAnchor.constraint(equalTo: topAnchor),
      btn.bottomAnchor.constraint(equalTo: bottomAnchor),
      btn.widthAnchor.constraint(equalToConstant: 200),
      btn.centerXAnchor.constraint(equalTo: centerXAnchor),
    ])
  }

  required init?(coder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
  }

  @objc func tapView() {
    print("点击了自定义按钮")
  }
}

open class CustomConversationController: ConversationController {
  public lazy var customTopView: CustomView = {
    let view = CustomView(frame: CGRect(x: 0, y: 10, width: NEConstant.screenWidth, height: 40))
    view.backgroundColor = .blue
    return view
  }()

  override public init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
    super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
  }

  public required init?(coder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
  }

  override public func viewDidLoad() {
    // 顶部 bodyTopView 中添加自定义 view（需要设置 bodyTopView 的高度）
    customTopView.btn.setTitle("通过重写方式添加", for: .normal)
    bodyTopView.addSubview(customTopView)
    bodyTopViewHeight = 80

    // 自定义占位图文案、背景图片
    emptyView.setEmptyImage(image: UIImage())
    emptyView.settingContent(content: "")
    ...
    super.viewDidLoad()
  }

  // 通过继承方式重写次最右侧按钮点击事件, 这种方式会覆盖配置项中的点击事件
override open func searchAction() {
  bodyTopViewHeight = 80
  bodyBottomViewHeight = 80
}

// 通过继承方式重写最右侧按钮点击事件, 这种方式会覆盖配置项中的点击事件
override open func didClickAddBtn() {
  bodyTopViewHeight = 0
  bodyBottomViewHeight = 0
}
}