问题描述
我试图实现的概述我正在尝试制作一个通知 tableview 并且每个通知都按其创建日期分组，因此 tableview 部分将是创建日期的数量，每个部分都包含在此创建的通知部分标题中的日期。 我已经搜索了很多，但没有得到一个绝对的答案如何使用 RxDataSource 数组是动态加载的，其中包含通过 API 接收的日期？
class T : UITableViewDataSource {
func numberOfSections(in tableView: UITableView) -> Int {
return array.count
}
}
我发现的所有内容都是像这样将部分设置为静态
viewmodel.AllNotificationsObservable
.map({ [NotificationSectionviewmodel(header: "Yet",items: $0.filter{$0.createAt.toDate()!.toString(format: "yyyy-MM-dd") == Date().toString(format: "yyyy-MM-dd") }),NotificationSectionviewmodel(header: "Yesterday",items: $0)
]
})
.bind(to: NotificationTableView.rx.items(dataSource: viewmodel.dataSource))
.disposed(by: notificationdisposeBag)
这是我的结构
struct NotificationSectionviewmodel {
var header: String
var items: [AllNotificationModel]
}
extension NotificationSectionviewmodel: SectionModelType {
typealias NotificationItem = AllNotificationModel
init(original: NotificationSectionviewmodel,items: [AllNotificationModel]) {
self = original
self.items = items
}
}
这是数据模型
class AllNotificationModel : Codable {
let id,userID : Int
let title,body,createAt: String
enum CodingKeys: String,CodingKey {
case id,title,body
case userID = "user_id"
case createAt = "create at"
}
}
我想要达到的目标
需要像这样的标题
“Today”: [
{
"id": 2421, "user_id": 39, "title": "todayNotification", "body": "test", "create at": "2021-02-26 17:33:44"
}, {
"id": 2349, "title": "check", "create at": "2021-02-26 09:36:05"
}, {
"id": 2206, "title": "New Deal", "body": "new Deal 2", "create at": "2021-02-26 13:43:16"
} ]
“Yesterday”: [
{
"id": 2134, "title": "Closed Deal", "body": “deal deal”, "create at": "2021-02-25 13:21:30"
} ]
“2021-02-24”: [
{
"id": 2134, "body": “deal”, "create at": "2021-02-24 13:21:30"
}, {
"id": 2063, "body": "new Deal", "create at": "2021-02-24 13:21:16"
}]
解决方法
在 RxDataSources 的 example 中，我们有：
Observable.just(sections)
.bind(to: tableView.rx.items(dataSource: dataSource))
.disposed(by: disposeBag)
您需要做的就是将 Observable.just(sections) 替换为绑定到您的数据的 Observable。让我们假设 notifications 是一个 Observable<[Notifications]>。然后你做这样的事情：
notifications.map { sections(from: $0) }
.bind(to: tableView.rx.items(dataSource: dataSource))
.disposed(by: disposeBag)
sections(from: $0) 是 [Notification] 数组到 sections 数组的转换，在某处定义它。您的部分结构必须符合协议 SectionModelType。
struct SectionOfNotification {
var header: String
var items: [Item]
}
extension SectionOfNotification : SectionModelType {
typealias Item = Notification
init(original: SectionOfNotification,items: [Item]) {
self = original
self.items = items
}
}
我的例子：
public lazy var appSections: Driver<[AppSection]> = {
Driver.combineLatest(chatAppCollectionData,functionAppCollectionData) { ($0,$1) }
.map { (chatAppCollectionData,functionAppCollectionData) -> [AppSection] in
let appSection1 = AppSection(header: NSLocalizedString("DASHBOARD_RECENT_CHATS",comment: ""),items: chatAppCollectionData)
let appSection2 = AppSection(header: NSLocalizedString("DASHBOARD_OTHERS",items: functionAppCollectionData)
return [
appSection1,appSection2
]
}
}()
这是部分：
import RxDataSources
struct AppSection {
var header: String
var items: [Item]
}
extension AppSection: SectionModelType {
typealias Item = EONApp
init(original: AppSection,items: [Item]) {
self = original
self.items = items
}
}
我想出了答案
override func bind(ViewModel: NotificationViewModel) {
ViewModel.dataSource.configureCell = { [unowned self] (dataSource,tableview,indexPath,item) in
let cell = tableview.dequeueReusableCell(withIdentifier: self.CellIdentifier,for: indexPath) as! NotificationTableViewCell
cell.setDataToUI(notificationData: item)
return cell
}
ViewModel.dataSource.titleForHeaderInSection = { (dataSource,index) in
let section = dataSource[index]
return section.header
}
var finalSections = [NotificationSectionViewModel]()
var sortedFinal = [NotificationSectionViewModel]()
var result = [String : [AllNotificationModel]]()
ViewModel.AllNotificationsObservable
.map({ section in
for (i,dict) in section.enumerated() {
result[(section[i].createAt.toDate()?.toString(format: "yyyy-MM-dd"))!,default: []].append(dict)
}
for (key,value) in result {
finalSections.append(NotificationSectionViewModel(header: key,items: value))
}
sortedFinal = finalSections.sorted(by: >)
for final in 0...sortedFinal.count - 1 {
if self.getTodayDate() == sortedFinal[final].header {
sortedFinal[final].header = "Today"
}
else if self.getYesterDay() == sortedFinal[final].header {
sortedFinal[final].header = "Yesterday"
}
else {
sortedFinal[final].header = convertDateFormater(sortedFinal[final].header)
}
}
return sortedFinal
})
.bind(to: NotificationTableView.rx.items(dataSource: ViewModel.dataSource))
.disposed(by: notificationDisposeBag)
}
这是我的单元格类
class NotificationTableViewCell: UITableViewCell {
@IBOutlet weak var notificationImageIcon: UIImageView!
@IBOutlet weak var notificationBodyMessage: UILabel!
@IBOutlet weak var notificationTime: UILabel!
@IBOutlet weak var seenNotificationView: UIView!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
selectionStyle = .none
}
func setDataToUI(notificationData: AllNotificationModel) {
DispatchQueue.main.async {
self.seenNotificationView.isHidden = true
self.notificationBodyMessage.text = notificationData.body
self.notificationTime.text = self.convertDateFormater(notificationData.createAt)
}
}
func convertDateFormater(_ date: String) -> String
{
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
let date = dateFormatter.date(from: date)
dateFormatter.dateFormat = "h:mm a"
return dateFormatter.string(from: date!)
}
}
我使用这两个函数来获取今天和昨天的日期
extension UIViewController {
func getTodayDate() -> String {
let currentDate = Date()
let df = DateFormatter()
df.dateFormat = "yyyy-MM-dd"
let dateString = df.string(from: currentDate)
return dateString
}
func getYesterDay() -> String {
let currentDate = Date.yesterday
let df = DateFormatter()
df.dateFormat = "yyyy-MM-dd"
let dateString = df.string(from: currentDate)
return dateString
}
}