当我使用 RxDatasources 更新数据源时,不会触发 configureCell

configureCell is not triggered when I update a datasource using RxDatasources

我的视图模型中有一个行为中继用作数据源。它的定义是这样的:

var posts: BehaviorRelay<[PostModel]>

它是通过网络用数据初始化的,我给它绑定数据时它能正常初始化tableView

现在,如果我尝试更改这里 post 的点赞状态,就像这样(这也在我的视图模型中):

private func observeLikeStatusChange() {
        
        self.changedLikeStatusForPost
            .withLatestFrom(self.posts, resultSelector: { (, [=11=]) })
            .map{ (posts, changedPost) -> [PostModel] in
                //...
                var editedPosts = posts
                editedPosts[index] = changedPost // here data is correct, index, changedContact
                return editedPosts
            }
            .bind(to: self.posts)
            .disposed(by: disposeBag)
    }

因此,没有任何反应。如果我从 editedPosts 中删除元素,tableView 会正确更新并删除该行。

PostModel struct 符合Equatable,此时要求所有属性都相同

在我的视图控制器中,我创建了这样的数据源:

tableView.rx.setDelegate(self).disposed(by: disposeBag)
 let dataSource = RxTableViewSectionedAnimatedDataSource<PostsSectionModel>(
            configureCell: { dataSource, tableView, indexPath, item in
             //...
                return postCell
            })
        
        postsViewModel.posts
            .map({ posts in
                let models = posts.map{ PostCellModel(model: [=12=]) }
                return [PostsSectionModel(model: "", items: models)]
            }) // If I put debug() here, this is triggered and I get correct section model with correct values
            .bind(to: self.tableView.rx.items(dataSource: dataSource))
            .disposed(by: disposeBag)

所以,正如我所说,我得到了正确的值,但没有触发 configureCell。我在这里做错了什么?

编辑:

这是 PostCellModel:

导入基金会

import RxDataSources

typealias PostsSectionModel = AnimatableSectionModel<String, PostCellModel>


struct PostCellModel : Equatable, IdentifiableType {
    
    static func == (lhs: PostCellModel, rhs: PostCellModel) -> Bool {
        
        return lhs.model.id == rhs.model.id
    }
    
    var identity: Int {
        return model.id
    }
    var model: PostModel
}

和一个 PostModel:

 struct PostModel: Codable, CellDataModel, Equatable {
    static func == (lhs: PostModel, rhs: PostModel) -> Bool {
       return
        lhs.liked == rhs.liked &&
        rhs.title == lhs.title &&
        
        lhs.location == rhs.location &&
        lhs.author == rhs.author &&
       
        lhs.created == rhs.created
    }
    
    let id: Int
    let title: String
    let location: String?
    let author: String
    let created: Int
    let liked:Bool
}

您在 PostCellModel 中错误地定义了 Equatable 一致性。因此,系统无法判断单元格模型是否已更改...删除您手动定义的 ==(lhs:rhs:) 并让系统为您生成它们,您应该没问题...

typealias PostsSectionModel = AnimatableSectionModel<String, PostCellModel>

struct PostCellModel : Equatable, IdentifiableType {
    var identity: Int {
        return model.id
    }
    var model: PostModel
}

struct PostModel: Codable, CellDataModel, Equatable {
    let id: Int
    let title: String
    let location: String?
    let author: String
    let created: Int
    let liked:Bool
}