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How do I post notification?It makes sense to update data in permanent storage and then when the view is loaded to update its table.

Hello,I checked out your bitbucket. Thank you for your help.I have always had a lot of views in my app but I only mentioned a few because mentioning all of them would have been a lot more code. Most of my views have the same structure so I thought I would just copy and paste and make miner adjustments. I can't figure out how your code works with the structure of my app. Let me explain my app.1. I have a main view controller with a table view and it has seasons in it. The first row is season 2019/2020.2. When click on season 2019/2020 row, it segues to a new view controller that has a table view. The table view looks like the following: Overall Top 200 Top 60 Rookies Top 30 Quarterbacks Top 80 Running Backs Top 80 Wide Receivers Top 30 Tight Ends Top 15 Defenses Top 15 KickersUnder this table view, I have 2 buttons: My Team Draft Order3. I can view my team or view the draft order by clicking on these buttons. When I click on one of the table view rows such as Top 30 Quarterbacks, it segues to another view controller that has a list of the top 30 quarterbacks.4. When I swipe to add a quarterback, it adds the quarterback in the swiped row to my team(myRoster). It also adds a strike through line through the text, adds a checkmark accessory, and changes the color of the cell. When it does this, I want it to do the same thing to the same player in Overall Top 200 and Top 60 Rookies if the player is found. If the player isn't found in those views, I want it to do nothing in those other views.5. If Overall Top 200 is selected, it segues to another view that displays the top 200 players. If a row with a player is added, I want it to do the same thing in the other views if the player is found. If the player isn't found, I want it to do nothing.The app works exactly how I want it to except for this function.

Yes it does show up when I return to the view.I also added in Top80RunningBacks_20192020 classprint("ViewWillAppear Top80RunningBacks_20192020")When I return to Top80RunningBacks_20192020 view I get this in log:ViewWillAppear Top80RunningBacks_20192020But when I return to Top30Quarterbacks_20192020 view I get this in log:ViewWillAppear Top30Quarterbacks_20192020along with a bunch of other stuff The date, the time, the name of the app, storyboard, and unknown class.I tried to copy and paste it but it kept saying 'Currently being moderated'

In the attributes inspector, there is only a Transition Style field. It is set to Cover Vertical. There is a Presentation field that is set to Automatic.Yes I did addprint("ViewWillAppear Top30Quarterbacks_20192020")in viewWillAppear

What do you mean by 'transition automatic'?This is what all of my viewWillAppear looks like.class Top80RunningBacks_20192020: UIViewController, UITableViewDelegate, UITableViewDataSource { var objectsArray = [PlayerData]() func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return objectsArray.count } override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) objectsArray = Database.shared.playerList(position: "RB") }class Top80WideReceivers_20192020: UIViewController,UITableViewDelegate, UITableViewDataSource { var objectsArray = [PlayerData]() func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return objectsArray.count } override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) objectsArray = Database.shared.playerList(position: "WR") }class Top30TightEnds_20192020: UIViewController, UITableViewDelegate, UITableViewDataSource { var objectsArray = [PlayerData]() func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return objectsArray.count } override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) objectsArray = Database.shared.playerList(position: "TE") }class Top15Defenses_20192020: UIViewController, UITableViewDelegate, UITableViewDataSource { var objectsArray = [PlayerData]() func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return objectsArray.count } override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) objectsArray = Database.shared.playerList(position: "DEF") }class Top15Kickers_20192020: UIViewController, UITableViewDelegate, UITableViewDataSource { var objectsArray = [PlayerData]() func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return objectsArray.count } override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) objectsArray = Database.shared.playerList(position: "K") }

The code is show is in Database class.class Database { static let shared = Database() // All players fileprivate var allPlayers: [PlayerData] fileprivate func playerDataURL() -> URL { let documentDirectoryURL = FileManager.default.urls(for: .documentDirectory, in:.userDomainMask).last! return documentDirectoryURL.appendingPathComponent("playerData.json") } fileprivate func playersWriteToDisk() { do { let data = try JSONEncoder().encode(allPlayers) try data.write(to: playerDataURL()) } catch let error as NSError { NSLog("Error reading file: \(error.localizedDescription)") } } fileprivate func playersReadFromDisk() -> [PlayerData]? { let filePlayerURL = playerDataURL() guard FileManager.default.fileExists(atPath: filePlayerURL.path) else { return nil } do { let fileContents = try Data(contentsOf: filePlayerURL) let list = try JSONDecoder().decode([PlayerData].self, from: fileContents) return list } catch let error as NSError { NSLog("Error reading file: \(error.localizedDescription)") } return nil } func playerList(position: String) -> [PlayerData] { return allPlayers.filter({ $0.position == position }) } // Top rookies fileprivate var topRookies: [PlayerData] fileprivate func topRookiesDataURL() -> URL { let documentDirectoryURL = FileManager.default.urls(for: .documentDirectory, in:.userDomainMask).last! return documentDirectoryURL.appendingPathComponent("topRookiesData.json") } fileprivate func topRookiesWriteToDisk() { do { let data = try JSONEncoder().encode(topRookies) try data.write(to: topRookiesDataURL()) } catch let error as NSError { NSLog("Error reading file: \(error.localizedDescription)") } } fileprivate func topRookiesReadFromDisk() -> [PlayerData]? { let filePlayerURL = topRookiesDataURL() guard FileManager.default.fileExists(atPath: filePlayerURL.path) else { return nil } do { let fileContents = try Data(contentsOf: filePlayerURL) let list = try JSONDecoder().decode([PlayerData].self, from: fileContents) return list } catch let error as NSError { NSLog("Error reading file: \(error.localizedDescription)") } return nil } func topRookiesList() -> [PlayerData] { return topRookies } // Top 200 Players fileprivate var topPlayers: [PlayerData] fileprivate func topPlayersDataURL() -> URL { let documentDirectoryURL = FileManager.default.urls(for: .documentDirectory, in:.userDomainMask).last! return documentDirectoryURL.appendingPathComponent("topPlayersData.json") } fileprivate func topPlayersWriteToDisk() { do { let data = try JSONEncoder().encode(topPlayers) try data.write(to: topPlayersDataURL()) } catch let error as NSError { NSLog("Error reading file: \(error.localizedDescription)") } } fileprivate func topPlayersReadFromDisk() -> [PlayerData]? { let filePlayerURL = topPlayersDataURL() guard FileManager.default.fileExists(atPath: filePlayerURL.path) else { return nil } do { let fileContents = try Data(contentsOf: filePlayerURL) let list = try JSONDecoder().decode([PlayerData].self, from: fileContents) return list } catch let error as NSError { NSLog("Error reading file: \(error.localizedDescription)") } return nil } func topPlayersList() -> [PlayerData] { return topPlayers } // myRoster/My Team func rosterList() -> [PlayerData] { let rosteredPlayers = allPlayers.filter { ($0.rosterPosition >= 0)} return rosteredPlayers.sorted(by: { $0.rosterPosition < $1.rosterPosition }) } func rosterArray() -> [PlayerData] { let roster = rosterList() return roster } func draftList() -> [PlayerData] { let draftedPlayers = allPlayers.filter({ $0.draftPosition >= 0 }) return draftedPlayers.sorted(by: { $0.draftPosition < $1.draftPosition }) } func addToRosterList(player: PlayerData) { let maxRosteredIndex = allPlayers.map({ $0.rosterPosition }).max()! player.rosterPosition = maxRosteredIndex + 1 } func addToDraftList(player: PlayerData) { let maxDraftedIndex = allPlayers.map({ $0.draftPosition }).max()! player.draftPosition = maxDraftedIndex + 1 } fileprivate func removeFromRosterList(player: PlayerData) { let currentRosterPosition = player.rosterPosition player.rosterPosition = -1 // No longer on the rosterList. Gets all players on roster at a higher index. let higherNumberedRosterPlayers = allPlayers.filter({ $0.rosterPosition > currentRosterPosition}) // Their rosterPositions have now gone down by one. for otherPlayer in higherNumberedRosterPlayers { otherPlayer.rosterPosition -= 1 // Decrease position by 1. } } func removeFromLists(player: PlayerData) { removeFromRosterList(player: player) removeFromDraftList(player: player) } fileprivate func removeFromDraftList(player: PlayerData) { let currentDraftPosition = player.draftPosition player.draftPosition = -1 // No longer on the rosterList. Gets all players on roster at a higher index. let higherNumberedRosterPlayers = allPlayers.filter({ $0.draftPosition > currentDraftPosition}) // Their rosterPositions have now gone down by one. for otherPlayer in higherNumberedRosterPlayers { otherPlayer.draftPosition -= 1 // Decrease position by 1. } } func changeMade() { playersWriteToDisk() } init() { allPlayers = [PlayerData]() topRookies = [PlayerData]() topPlayers = [PlayerData]() if let playerList = playersReadFromDisk() { allPlayers = playerList } else { allPlayers = [ // Quarterbacks PlayerData(num: 1, name: "Patrick Mahomes", team: "KC", position: "QB"), PlayerData(num: 2, name: "Deshaun Watson", team: "HOU", position: "QB"), ...all of the previous code from my last comment. Each view has an array called objectsArray.class Top30Quarterbacks_20192020: UIViewController, UITableViewDelegate, UITableViewDataSource { var objectsArray = [PlayerData]() func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return objectsArray.count } override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) objectsArray = Database.shared.playerList(position: "QB") }Is this considered a global data model? What do you mean by that?

Yes, I agree to update the data source. How do I update the data source in topQuarterbacks for a quarterback when the data source is changed in topPlayers?For example:I perform the addPlayer action for Patrick Mahomes in topPlayers. At bthe same time, I want to update allPlayers for Patrick Mahomes.init() { allPlayers = [PlayerData]() topRookies = [PlayerData]() topPlayers = [PlayerData]() if let playerList = playersReadFromDisk() { allPlayers = playerList } else { allPlayers = [ // Quarterbacks PlayerData(num: 1, name: "Patrick Mahomes", team: "KC", position: "QB"), PlayerData(num: 2, name: "Deshaun Watson", team: "HOU", position: "QB"), PlayerData(num: 3, name: "Aaron Rodgers", team: "GB", position: "QB"), PlayerData(num: 4, name: "Matt Ryan", team: "ATL", position: "QB"), PlayerData(num: 5, name: "Baker Mayfield", team: "CLE", position: "QB"), PlayerData(num: 6, name: "Carson Wentz", team: "PHI", position: "QB"), PlayerData(num: 7, name: "Jared Goff", team: "LAR", position: "QB"), PlayerData(num: 8, name: "Cam Newton", team: "CAR", position: "QB"), PlayerData(num: 9, name: "Andrew Luck", team: "IND", position: "QB"), PlayerData(num: 10, name: "Drew Brees", team: "NO", position: "QB"), PlayerData(num: 11, name: "Ben Roethlisberger", team: "PIT", position: "QB"), PlayerData(num: 12, name: "Dak Prescott", team: "DAL", position: "QB"), PlayerData(num: 13, name: "Russell Wilson", team: "SEA", position: "QB"), PlayerData(num: 14, name: "Kyler Murray", team: "ARI", position: "QB"), PlayerData(num: 15, name: "Tom Brady", team: "NE", position: "QB"), PlayerData(num: 16, name: "Lamar Jackson", team: "BAL", position: "QB"), PlayerData(num: 17, name: "Mitchell Trubisky", team: "CHI", position: "QB"), PlayerData(num: 18, name: "Jameis Winston", team: "TB", position: "QB"), PlayerData(num: 19, name: "Philip Rivers", team: "LAC", position: "QB"), PlayerData(num: 20, name: "Kirk Cousins", team: "MIN", position: "QB"), PlayerData(num: 21, name: "Derek Carr", team: "OAK", position: "QB"), PlayerData(num: 22, name: "Sam Darnold", team: "NYJ", position: "QB"), PlayerData(num: 23, name: "Josh Allen", team: "BUF", position: "QB"), PlayerData(num: 24, name: "Matthew Stafford", team: "DET", position: "QB"), PlayerData(num: 25, name: "Marcus Mariota", team: "TEN", position: "QB"), PlayerData(num: 26, name: "Jimmy Garoppolo", team: "SF", position: "QB"), PlayerData(num: 27, name: "Andy Dalton", team: "CIN", position: "QB"), PlayerData(num: 28, name: "Eli Manning", team: "NYG", position: "QB"), PlayerData(num: 29, name: "Nick Foles", team: "JAC", position: "QB"), PlayerData(num: 30, name: "Joe Flacco", team: "DEN", position: "QB") ] } if let topRookiesList = topRookiesReadFromDisk() { topRookies = topRookiesList } else { topRookies = [ PlayerData(num: 1, name: "Josh Jacobs", team: "OAK", position: "RB"), PlayerData(num: 2, name: "David Montgomery", team: "CHI", position: "RB"), PlayerData(num: 3, name: "Miles Sanders", team: "PHI", position: "RB"), PlayerData(num: 4, name: "A.J. Brown", team: "TEN", position: "WR"), PlayerData(num: 5, name: "N'Keal Harry", team: "NE", position: "WR"), PlayerData(num: 6, name: "JJ Arcega-Whiteside", team: "PHI", position: "WR"), PlayerData(num: 7, name: "DK Metcalf", team: "SEA", position: "WR"), PlayerData(num: 8, name: "Kyler Murray", team: "ARI", position: "QB"), PlayerData(num: 9, name: "T.J. Hockenson", team: "DET", position: "TE"), PlayerData(num: 10, name: "Andy Isabella", team: "ARI", position: "WR"), PlayerData(num: 11, name: "Marquise Brown", team: "BAL", position: "WR"), PlayerData(num: 12, name: "Deebo Samuel", team: "SF", position: "WR"), PlayerData(num: 13, name: "Mecole Hardman", team: "KC", position: "WR"), PlayerData(num: 14, name: "Noah Fant", team: "DEN", position: "TE"), PlayerData(num: 15, name: "Parris Campbell", team: "IND", position: "WR"), PlayerData(num: 16, name: "Devin Singletary", team: "BUF", position: "RB"), PlayerData(num: 17, name: "Darrell Henderson", team: "LAR", position: "RB"), PlayerData(num: 18, name: "Damien Harris", team: "NE", position: "RB"), PlayerData(num: 19, name: "Hakeem Butler", team: "ARI", position: "WR"), PlayerData(num: 20, name: "Diontae Johnson", team: "PIT", position: "WR") ] } if let top200PlayersList = topPlayersReadFromDisk() { topPlayers = top200PlayersList } else { topPlayers = [ PlayerData(num: 1, name: "Saquon Barkley", team: "NYG", position: "RB"), PlayerData(num: 2, name: "Christian McCaffrey", team: "CAR", position: "RB"), PlayerData(num: 3, name: "Alvin Kamara", team: "NO", position: "RB"), PlayerData(num: 4, name: "DeAndre Hopkins", team: "HOU", position: "WR"), PlayerData(num: 5, name: "Michael Thomas", team: "NO", position: "WR"), PlayerData(num: 6, name: "Ezekiel Elliott", team: "DAL", position: "RB"), PlayerData(num: 7, name: "Davante Adams", team: "GB", position: "WR"), PlayerData(num: 8, name: "David Johnson", team: "ARI", position: "RB"), PlayerData(num: 9, name: "Le'Veon Bell", team: "NYJ", position: "RB"), PlayerData(num: 10, name: "Todd Gurley II", team: "LAR", position: "RB"), PlayerData(num: 11, name: "Julio Jones", team: "ATL", position: "WR"), PlayerData(num: 12, name: "Tyreek Hill", team: "KC", position: "WR"), PlayerData(num: 13, name: "Odell Beckham Jr.", team: "CLE", position: "WR"), PlayerData(num: 14, name: "Kerryon Johnson", team: "DET", position: "RB"), PlayerData(num: 15, name: "Joe Mixon", team: "CIN", position: "RB"), PlayerData(num: 16, name: "James Conner", team: "PIT", position: "RB"), PlayerData(num: 17, name: "JuJu Smith-Schuster", team: "PIT", position: "WR"), PlayerData(num: 18, name: "Antonio Brown", team: "OAK", position: "WR"), PlayerData(num: 19, name: "Mike Evans", team: "TB", position: "WR"), PlayerData(num: 20, name: "Dalvin Cook", team: "MIN", position: "RB"), PlayerData(num: 21, name: "Travis Kelce", team: "KC", position: "TE"), PlayerData(num: 22, name: "Nick Chubb", team: "CLE", position: "RB"), PlayerData(num: 23, name: "Patrick Mahomes", team: "KC", position: "QB"), PlayerData(num: 24, name: "Leonard Fournette", team: "JAC", position: "RB"), PlayerData(num: 25, name: "Keenan Allen", team: "LAC", position: "WR"), PlayerData(num: 26, name: "Amari Cooper", team: "DAL", position: "WR"), PlayerData(num: 27, name: "George Kittle", team: "SF", position: "TE"), PlayerData(num: 28, name: "Zach Ertz", team: "PHI", position: "TE"), PlayerData(num: 29, name: "Josh Jacobs", team: "OAK", position: "RB"), PlayerData(num: 30, name: "Deshaun Watson", team: "HOU", position: "QB") ] } }

Hello,I don't have a first view in navigation referenced as ViewController.I did find the problem though.The problem actually was that I wasn't calling the data from the database.I have 2 buttons in my main view, one is for loading a table with myRoster and one is for loading a table with draftOrder.I didn't ever show the code with these two buttons but I just changed the code to pull data from the database:The problem actually was that I wasn't calling the data from the database. I have 2 buttons in my main view, one is for loading a table with myRoster and one is for loading a table with draftOrder. I didn't ever show the code with these two buttons but I just changed the code to pull data from the database:Thank you for your help.

Hello, The problem actually was that I wasn't calling the data from the database.I have 2 buttons in my main view, one is for loading a table with myRoster and one is for loading a table with draftOrder.I didn't ever show the code with these two buttons but I just changed the code to pull data from the database:@IBAction func draftOrder_2019_2020(_ sender: UIButton) { if Database.shared.draftList().isEmpty { performSegue(withIdentifier: "no draft", sender: self) } else { performSegue(withIdentifier: "draft order 2019/2020", sender: self) } }It works perfect now. The only thing I need to do is to slow down the animation and make it smooth when reloading the tables after I swipe and tap the add button in Top_30_Quarterbacks view controller.Thank you for your help.

Yes, the way you proposed in appDelegate does work. I am going to open up a new thread using database option.Thank you for your help.

I am going to try both ways. I would like to implement the database method but it is really complex. I will give it a shot.

Ok. What class do I add applicationWillTerminate and appDidFinishLaunching to? Thank you

I have 2 arrays declared outside of a class called myRoster and draftOrder.import Foundation import UIKit var myRoster: [String]? = [] var draftOrder: [String]? = []In other classes such as Top_30_Quarterbacks, when a player is added, I append to myRoster array and draftOrder array. When a player is taken, I append to draftOrder array.func addPlayer(index: IndexPath) { _ = top30QuarterbacksTable.cellForRow(at: index) let name: String = objectsArray[index.row].name let team: String = objectsArray[index.row].team let position: String = objectsArray[index.row].position objectsArray[index.row].strikeThrough = true objectsArray[index.row].accessory = true objectsArray[index.row].color = true if myRoster == [] { myRoster?.insert("\(name), \(team) - \(position)", at: 0) } else { myRoster?.append("\(name), \(team) - \(position)") } if draftOrder == [] { draftOrder?.insert("\(name), \(team) - \(position)", at: 0) } else { draftOrder?.append("\(name), \(team) - \(position)") } top30QuarterbacksTable.reloadData() Database.shared.changeMade() } func markAsTaken(index: IndexPath) { _ = top30QuarterbacksTable.cellForRow(at: index) let name: String = (objectsArray[index.row].name) let team: String = (objectsArray[index.row].team) let position: String = (objectsArray[index.row].position) objectsArray[index.row].strikeThrough = true objectsArray[index.row].color = true objectsArray[index.row].accessory = false if draftOrder == [] { draftOrder?.insert("\(name), \(team) - \(position)", at: 0) } else { draftOrder?.append("\(name), \(team) - \(position)") } top30QuarterbacksTable.reloadData() Database.shared.changeMade() }When I switch views, the arrays stay populated with the data but when I close the app and reopen it, the data is lost. I tried UserDefaults but it doesn't work.

I am sorry. I changed Data to PlayerData in the data and it works perfectly.Thank you for your help.

Yes, I didn't realize I didn't change that. I should have known to change Data to PlayerData. It works great!Thank you very much for your help.