我有一个包含多个部分的 tableView,我想在一个单元格中(通过通知)显示 Alamofire 正在处理的下载进度。
现在,我已经有通知帖子工作并作为信息传递,一个情节对象,如下所示:
let info = ["episode": episode, "progress": progress.fractionCompleted] as [String : Any]
NotificationCenter.default.post(name: .downloadProgress, object: nil, userInfo: info)
每个单元格都有一个情节对象。所以我想找到一个单元格的 IndexPath,该单元格的情节对象与从通知传递的情节对象相匹配。
我不知道如何循环遍历我的单元格以查找哪个有该情节并获取它的 indexPath,以便我可以正确响应通知。
我试图获取作为 dataSource 的数组的索引,但由于 tableView 有多个部分,这不起作用。
有人能帮我吗?谢谢
我的表视图控制器:
//
// EpisodesViewController.swift
// Podee
//
// Created by Vinícius Barcelos on 21/07/18.
// Copyright © 2018 Vinícius Barcelos. All rights reserved.
//
import UIKit
import RealmSwift
import Kingfisher
class EpisodesTableViewController: UITableViewController {
//MARK:- Variables
var episodes: Results<Episode> = RealmService.shared.read(object: Episode.self).sorted(byKeyPath: "pubDate", ascending: true)
let episodesCellId = "episodesCellId"
var notificationToken: NotificationToken?
var episodesDictionary = Dictionary<Date, [Episode]>()
var dateDays = [Date]()
//MARK:- Lifecycle
override func viewDidLoad() {
super.viewDidLoad()
setupTableView()
setupObservers()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
tableView.reloadData()
}
deinit {
self.notificationToken?.invalidate()
//NotificationCenter.default.removeObserver(self, name: NSNotification.Name.downloadProgress, object: nil)
}
//MARK:- Setup
fileprivate func setupObservers() {
NotificationCenter.default.addObserver(self, selector: #selector(handleDownloadProgressNotification(notification:)), name: .downloadProgress, object: nil)
}
}
@objc func handleDownloadProgressNotification(notification:Notification) {
////////
}
//MARK:- Tableview methods
override func numberOfSections(in tableView: UITableView) -> Int {
return episodesDictionary.count
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let key = dateDays[section]
guard let datesValues = episodesDictionary[key] else {
return 0
}
return datesValues.count
}
override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd MMMM"
return dateFormatter.string(from: dateDays[section])
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: episodesCellId, for: indexPath) as! EpisodesTableViewCell
let key = dateDays[indexPath.section]
if let podcastValues = episodesDictionary[key] {
cell.delegate = self
cell.progressBar.isHidden = true
cell.episode = podcastValues[indexPath.row]
}
return cell
}
}
下载代码:
// Start download
Alamofire.request(episode.streamURL).downloadProgress { (progress) in
// Send a notification about the download progress
let info = ["episode": episode, "progress": progress.fractionCompleted] as [String : Any]
NotificationCenter.default.post(name: .downloadProgress, object: nil, userInfo: info)
//print(progress)
// Check data
}.responseData { (responseData) in ......