SwifityJSON problem with parsing JSON to ViewController from other libraries/frameworks - ios

I have the following json look like:
"message": "Something message here"
"data": [
{ "_id": "671672167bhw2hw"
"photo": "https://uploads.example.com/671672167bhw2hw.jpg"
"description": "Something description here"
"date": "2020-07-01T09:44:15.448Z"
"user": "John Doe"
}
]
}
I used SwiftifyJSON library to decode and parsing JSON. My code is look like:
class Post: NSObject {
var message: String
var text: String?
var photoURL: URL?
var date: Date?
}
init(json: JSON) {
self.user = User(id: json["user_id"].stringValue,
name: json["user"].stringValue,
photoURL: URL(string: json["user_photo"].stringValue))
self.message = json["message"].stringValue
self.objectId = json["data"]["_id"].stringValue
self.text = json["data"]["description"].string
self.date = DateFormatter.iso8601.date(from: json["data"]["date"].stringValue)
}
and my ApiManager extensions
static func getPosts(before date: Date? = nil, withSuccess success: #escaping (Bool, [Post]) -> Void) {
guard let url = URL(string: ApiEndpoint.Wall.getPosts) else {
success(false, [Post]())
return
}
var json = [String: String]()
DispatchQueue.global(qos: .background).async {
ApiManager.request(url: url, method: .post, parameters: json) { response, statusCode in
switch statusCode {
case 200:
success(true, ApiManager.getWallPostsFrom(response: response))
return
default: break
}
success(false, [Post]())
return
}
}
}
private static func getPostsFrom(response: DataResponse<Any>) -> [Post] {
var result = [Post]()
guard let value = response.result.value,
let jsonArray = JSON(value).array else { return result }
for json in jsonArray {
let object = Post(json: json)
result.append(object)
}
return result
}
}
I get response with 200, it's OK.
But still not working for displaying data in PostViewController. What is wrong? Additionaly I use my own libraries for tabs in application like Contacts, Messages, Discussion Panel and more, so I use my own library with some files, models, views, assets for any tab.
Below is my PostViewController for displaying data from JSON.
private func tryGetPosts() {
canLoadPosts = false
tableView.dataState = .downloading
ApiManager.getPosts(before: Posts.last?.date) { [weak self] (success, objects) in
self?.tableView.dataState = .noData
print("Objects count: ", objects)
guard objects.count > 0 else { return }
#warning("Insert animation")
self?.tableView.beginUpdates()
self?.Posts += objects
let indexPaths = (self!.Posts.count - objects.count ..< self!.Posts.count)
.map { IndexPath(row: $0, section: 0) }
self?.tableView.insertRows(at: indexPaths, with: .top)
self?.tableView.endUpdates()
self?.Posts.insert(contentsOf: objects, at: self?.Posts.count ?? 0)
self?.tableView.reloadData()
self?.canLoadWallPosts = true
}
Please for any reply and advice.
Best regards.

The answer for this problem was in JSON(value).array.
If your JSON structure have like "data" array you can write JSON(value)["data"].array. SwiftyJSON is really friendly and easy library.

Related

Display last message in chat with firestore

How I can get and display last message in my chat?
For test, I created four users with test messages. Now I can display only last message for all users. I mark red color.
Also I use firebase to save messages and create channels.
Struct in firebase look like this:
- Chats
- channel id
- document data (then be stored ID and NAME of channel)
- collection thread
- documents data (then be stored MESSAGES)
My struct in channel:
struct Channel {
let id: String?
let name: String
init(name: String) {
id = nil
self.name = name
}
init?(document: DocumentSnapshot) {
let data = document.data()!
guard let name = data["name"] as? String else {
return nil
id = document.documentID
self.name = name
}
}
extension Channel: DatabaseRepresentation {
var representation: [String : Any] {
var rep = ["name": name]
if let id = id {
rep["id"] = id
}
return rep
}
}
And my struct message, I use MessageKit:
struct Message: MessageType {
let id: String?
let content: String
let sentDate: Date
let sender: SenderType
var kind: MessageKind {
if let image = image {
return .photo(ImageMediaItem.init(image: image))
} else {
return .text(content)
}
}
var messageId: String {
return id ?? UUID().uuidString
}
var image: UIImage? = nil
var downloadURL: URL? = nil
init(profile: Profile, content: String) {
sender = Sender(id: profile.id, displayName: profile.name)
self.content = content
sentDate = Date()
id = nil
}
init?(document: QueryDocumentSnapshot) {
let data = document.data()
guard let sentDate = (data["created"] as? Timestamp)?.dateValue() else {
return nil
}
guard let senderID = data["senderID"] as? String else {
return nil
}
guard let senderName = data["senderName"] as? String else {
return nil
}
id = document.documentID
self.sentDate = sentDate
sender = Sender(id: senderID, displayName: senderName)
if let content = data["content"] as? String {
self.content = content
downloadURL = nil
} else if let urlString = data["url"] as? String, let url = URL(string: urlString) {
downloadURL = url
content = ""
} else {
return nil
}
}
}
extension Message: DatabaseRepresentation {
var representation: [String : Any] {
var rep: [String : Any] = [
"created": sentDate,
"senderID": sender.senderId,
"senderName": sender.displayName
]
if let url = downloadURL {
rep["url"] = url.absoluteString
} else {
rep["content"] = content
}
return rep
}
}
For load my chennels I use code below:
fileprivate func observeQuery() {
guard let query = query else { return }
listener = query.addSnapshotListener { (snapshot, error) in
guard let snapshot = snapshot else {
print("Error listening for channel updates: \(error?.localizedDescription ?? "No error")")
return
}
snapshot.documentChanges.forEach { (change) in
self.handleDocumentChange(change)
}
}
}
private func handleDocumentChange(_ change: DocumentChange) {
guard let channel = Channel(document: change.document) else {
return
}
switch change.type {
case .added:
addChannelToTable(channel)
case .modified:
updateChannelInTable(channel)
case .removed:
removeChannelFromTable(channel)
}
}
private func addChannelToTable(_ channel: Channel) {
guard !channels.contains(channel) else {
return
}
channels.append(channel)
channels.sort()
guard let index = channels.index(of: channel) else {
return
}
tableView.insertRows(at: [IndexPath(row: index, section: 0)], with: .automatic)
}
private func updateChannelInTable(_ channel: Channel) {
guard let index = channels.index(of: channel) else {
return
}
channels[index] = channel
tableView.reloadRows(at: [IndexPath(row: index, section: 0)], with: .automatic)
}
private func removeChannelFromTable(_ channel: Channel) {
guard let index = channels.index(of: channel) else {
return
}
channels.remove(at: index)
tableView.deleteRows(at: [IndexPath(row: index, section: 0)], with: .automatic)
}
I think need update my Channel struct. But how to do it?
And how to correct load and display last message from firebase?
If need more info pls tell me, I will update my question.
If the question is how to get only the last message from Firestore, you need to define how to determine what the last message is. That's usually done via a timestamp - the latest timestamp will be the last message.
The structure in the question is a little unclear so let me provide a simple example.
messages //collection
document_0 //documentID auto-generated
msg: "Last Message"
timestamp: "20191201"
document_1
msg: "First message"
timestamp: "20190801"
document_2
msg: "A message in the middle"
timestamp: "20191001"
As you can see, no matter what order they are written to Firestore, it's clear that the one with the latest timestamp (20191201 ) is the last message.
To get the last message we need a query that does two things:
1) Query the messages node, sort descending, which will put the last message 'at the top'
2) Limit the query to 1, which will get that message.
func readLastMessage() {
let ref = Firestore.firestore().collection("messages").order(by: "timestamp", descending: true).limit(to: 1)
ref.getDocuments(completion: { querySnapshot, error in
guard let snapshot = querySnapshot else {
print("Error fetching snapshots: \(error!)")
return
}
if let doc = snapshot.documents.first {
let docID = doc.documentID
let msg = doc.get("msg")
print(docID, msg)
}
})
}
and the output
Last Message
The above code gets the last message but could be expanded upon by adding an observer instead of getDocuments in the same fashion that will notify the app when there's a new last message.

Variable value get empty in iOS swift

I have create computed property for store the strTokenValue and send it to the web services.
private var strTokenValue = String()
var tokenValue: String {
get {
if strTokenValue != "" {
return strTokenValue
}
else {
if let token = StrongBoxController.sharedInstance.keychainStore.unarchive(objectForKey: "TokenValue") as? Data {
strTokenValue = StrongBoxController.sharedInstance.convertDataToString(value: token)
return strTokenValue
}
else {
return ""
}
}
}
set {
strTokenValue = ""
StrongBoxController.sharedInstance.saveValues(value: "\(newValue)", key: “TokenValue”)
}
}
We have send every user action Asynchronously and we have not wait for success response for track function web services, So i have not added success and failure response in the below code.
func track(actionTaken: String,incidentNumber: String,message: String,completion:#escaping(_ success: Bool, _ error: String,_ actionTakenName: String) -> Void ) {
DispatchQueue.global(qos: .background).async {
let url = "\(ServerCommunication.sharedInstance.getDomainBaseUrl())api/track"
let parameters = [
“token_value” : self.tokenValue,
"device_os":"iOS",
"device_type": UIDevice.modelName,
"action_taken": actionTaken,
"message" : message,
]
}
}
We have called the one more web service to send the image and tokenValue.
Request:
“token_value” : “”,
"device_os":"iOS",
"device_type": “iPhone X”,
"action_taken": “Image captured”,
"message" : “”,
func convertDataToString(value: Data) -> String {
return String(decoding: value, as: UTF8.self)
}
public func unarchive(objectForKey key:String) -> Any? {
guard let data = self.data(forKey: key) else {
return nil
}
let unarchiver = NSKeyedUnarchiver(forReadingWith: data as Data)
return unarchiver.decodeObject(forKey: key)
}
#objc func saveValues(value : String, key: String) {
_ = self.keychainStore.archive(convertStringToData(value: value), key: key, accessibility: kSecAttrAccessibleWhenUnlockedThisDeviceOnly)
}
Both web services called simultaneously and “tokenValue” get empty in trackActions web services in some scenarios
It seems the problem is that you save data using convertStringToData which doesn't probably use convertStringToData. I think so because of convertDataToString doesn't use NSKeyedAarchiver.
In order to resolve, you should use unarchive.
To save the data use
func convertDataToString(value: Data) -> String? {
return String(data: value, encoding: .utf8)
}
func convertStringToData(value: String) -> Data? {
return value.data(using: .utf8)
}
and
keychainStore.archive(convertStringToData(value: value), key: key, accessibility: kSecAttrAccessibleWhenUnlockedThisDeviceOnly)
stored = convertDataToString(StrongBoxController.sharedInstance.keychainStore.unarchive(objectForKey: "TokenValue"))

Can't access model object data outside the alamofire request scope while populating api data on badoo/Chatto chat text

Previously I successfully access model objects anywhere in the class but while populating data on badoo/chatto text view I am stuck.
I am integrating chat message api into badoo chat view
Basically, the issue is alamofire response is not getting outside of the scope.
Did I try with compilation handler but no luck? Is there any way to resolve this issue?
Thanks in advance .
Here is code snippet :
import Foundation
import Chatto
import ChattoAdditions
import SwiftyJSON
import Alamofire
class DemoChatMessageFactory {
public static var chats = [ChatModel]()
class func makeMessage(_ uid:String) -> DemoTextMessageModel{
print("uid makeMessage : \(uid)")
return self.makeMessageData(uid, isIncoming:false)
}
class func makeMessageData(_ uid: String,isIncoming:Bool) -> DemoTextMessageModel {
if isIncoming == true{
return self.makeTextFinalMessage(uid, isIncoming:isIncoming)
} else {
return self.makeTextFinalMessage(uid, isIncoming: isIncoming)
}
}
public class func makeTextMessage(_ uid: String, isIncoming: Bool,text:String) -> DemoTextMessageModel {
let messageModel = self.makeMessageModel(uid, isIncoming: isIncoming,
type: TextMessageModel<MessageModel>.chatItemType)
let textMessageModel = DemoTextMessageModel(messageModel:messageModel,
text: text)
return textMessageModel
}
public class func makeTextFinalMessage(_ uid: String, isIncoming: Bool) -> DemoTextMessageModel {
var text = String()
var uidInt = Int(uid)
print("string uid 121 \(uid)")
print("print is Incomming data or not 1: \(isIncoming)")
print("uid count :\(uid.count)")
let urlString = "[My message Api]"
Alamofire.request(urlString, method: .get).validate().responseJSON {
(response) -> Void in
if let value = response.data {
do {
let json = try JSON(data: value)
if let dictionnary = json.dictionaryObject {
if let messageArray = dictionnary["message"] as?[[String: Any]] {
self.chats.removeAll()
for arr in messageArray {
self.chats.append(ChatModel(ChatListJSON: arr))
}
}
}
} catch {
print("cannot convert to Json")
}
}
print("print int 122 : \(uidInt!)")
print("Chat List Id DemoChatMessageFactory \(self.chats[uidInt!].chatId)")
print("chat message: \(String(describing: uidInt!)) th \(self.chats[uidInt!].chatMessage)")
self.textData = "\(self.chats[uidInt!].chatMessage)"
self.makeTextMessage(uid, isIncoming: isIncoming, text:self.textData) //Here I am bale to pass textData but ouside the Alamofire block can't access
}
//Here getting empty values
print("uid makeTextFinalMessage \(uid)")
print("in coming makeTextFinalMessage \(isIncoming)")
print("text makeTextFinalMessage \(text)")
//chat count also getting zero count
print("chat count final text\(chats.count)")
print("print chat count : \(self.chats.count)")
return self.makeTextMessage(uid, isIncoming: isIncoming, text:self.textData)
}
}
Test for completion handler
public var res: Any = ""
func getAllChatData(completionhandler:#escaping ([String: Any]?) -> ()){
let URL = "my api"
Alamofire.request(URL).responseJSON {
response in
if let json = response.result.value as? [String: Any] {
completionhandler(json, nil)
}
else if let error = response.result.error as Error? {
completionhandler(nil, error)
}
}
}
and call using like below inside the function
DemoChatMessageFactory.getAllChatData {
(result) in
res = result
print("response (res)")
}
please suggest me the proper way to alamofire with compilation handler
This is an example of converting all methods using the result of asynchronous call. As I have never used Chatto and you are not showing all the types in your code, so you may need to modify many parts of my code, but I believe you can see what you need to do with this code.
import Foundation
import Chatto
import ChattoAdditions
import SwiftyJSON
import Alamofire
class DemoChatMessageFactory {
public static var chats = [ChatModel]()
class func requestMessage(_ uid:String,
completion: #escaping (DemoTextMessageModel?, Error?)->Void) {
print("uid makeMessage : \(uid)")
self.requestMessageData(uid, isIncoming: false) { (model, error) in
completion(model, error)
}
}
class func requestMessageData(_ uid: String, isIncoming: Bool,
completion: #escaping (DemoTextMessageModel?, Error?)->Void) {
if isIncoming {
//...put any code needed when isIncoming is true
self.requestTextFinalMessage(uid, isIncoming: isIncoming) { model in
completion(model, error)
}
} else {
//...put any code needed when isIncoming is false
self.requestTextFinalMessage(uid, isIncoming: isIncoming) { model in
completion(model, error)
}
}
}
public class func makeTextMessage(_ uid: String, isIncoming: Bool, text: String) -> DemoTextMessageModel {
let messageModel = self.makeMessageModel(uid, isIncoming: isIncoming,
type: TextMessageModel<MessageModel>.chatItemType)
let textMessageModel = DemoTextMessageModel(messageModel:messageModel,
text: text)
return textMessageModel
}
public class func requestTextFinalMessage(_ uid: String, isIncoming: Bool,
completion: #escaping (DemoTextMessageModel?, Error?)->Void) {
var text = String()
var uidInt = Int(uid)
print("string uid 121 \(uid)")
print("print is Incomming data or not 1: \(isIncoming)")
print("uid count :\(uid.count)")
let urlString = "[My message Api]"
Alamofire.request(urlString, method: .get).validate().responseJSON {
(response) -> Void in
if let value = response.data {
do {
let json = try JSON(data: value)
if let dictionnary = json.dictionaryObject {
if let messageArray = dictionnary["message"] as?[[String: Any]] {
self.chats.removeAll()
for arr in messageArray {
self.chats.append(ChatModel(ChatListJSON: arr))
}
}
}
print("print int 122 : \(uidInt!)")
print("Chat List Id DemoChatMessageFactory \(self.chats[uidInt!].chatId)")
print("chat message: \(String(describing: uidInt!)) th \(self.chats[uidInt!].chatMessage)")
self.textData = "\(self.chats[uidInt!].chatMessage)"
completion(self.makeTextMessage(uid, isIncoming: isIncoming, text: self.textData), nil)
} catch {
print("cannot convert to Json")
completion(nil, error)
}
} else {
//better generate an error case result, and call completion.
//...
}
}
}
}
I changed some method names from make... to request... to show clarify they are asynchronous methods.
And the usage, if you intend to use your original code as:
let model = DemoChatMessageFactory.makeMessage(uid)
//Do some UI updates using `model`...
You may need to use asynchronous methods like:
DemoChatMessageFactory.requestMessage(uid) { (model, error) in
if let model = model {
//Do some UI updates using `model`...
} else {
//Do something for the error...
}
}

Updating Firestore Database causes iOS crash

When I update the firebase firestore database with any new field, it instantly kills any app running that uses the data with the fatal error in the code below.
The error I get says "fatalError: "Unable to initialize type Restaurant with dictionary [(name: "test", availability: "test", category: "test")]
I'd like to be able to update it without having the apps crash. If that happens, they have to delete and reinstall the app to get it to work again, so I think it's storing the data locally somehow, but I can't find where.
What can I do to make this reset the data or reload without crashing?
The file where the error is thrown (when loading the table data):
fileprivate func observeQuery() {
stopObserving()
guard let query = query else { return }
stopObserving()
listener = query.addSnapshotListener { [unowned self] (snapshot, error) in
guard let snapshot = snapshot else {
print("Error fetching snapshot results: \(error!)")
return
}
let models = snapshot.documents.map { (document) -> Restaurant in
if let model = Restaurant(dictionary: document.data()) {
return model
} else {
// Don't use fatalError here in a real app.
fatalError("Unable to initialize type \(Restaurant.self) with dictionary \(document.data())")
}
}
self.restaurants = models
self.documents = snapshot.documents
if self.documents.count > 0 {
self.tableView.backgroundView = nil
} else {
self.tableView.backgroundView = self.backgroundView
}
self.tableView.reloadData()
}
}
And the Restaurant.swift file:
import Foundation
struct Restaurant {
var name: String
var category: String // Could become an enum
var availability: String // from 1-3; could also be an enum
var description: String
var dictionary: [String: Any] {
return [
"name": name,
"category": category,
"availability": availability,
"description": description
]
}
}
extension Restaurant: DocumentSerializable {
//Cities is now availability
static let cities = [
"In Stock",
"Back Order",
"Out of Stock"
]
static let categories = [
"Rock", "Boulder", "Grass", "Trees", "Shrub", "Barrier"
]
init?(dictionary: [String : Any]) {
guard let name = dictionary["name"] as? String,
let category = dictionary["category"] as? String,
let availability = dictionary["availability"] as? String,
let description = dictionary["description"] as? String
else { return nil }
self.init(name: name,
category: category,
availability: availability,
description: description
)
}
}
The Local Collection File with the Document.Serializable code:
import FirebaseFirestore
// A type that can be initialized from a Firestore document.
protocol DocumentSerializable {
init?(dictionary: [String: Any])
}
final class LocalCollection<T: DocumentSerializable> {
private(set) var items: [T]
private(set) var documents: [DocumentSnapshot] = []
let query: Query
private let updateHandler: ([DocumentChange]) -> ()
private var listener: ListenerRegistration? {
didSet {
oldValue?.remove()
}
}
var count: Int {
return self.items.count
}
subscript(index: Int) -> T {
return self.items[index]
}
init(query: Query, updateHandler: #escaping ([DocumentChange]) -> ()) {
self.items = []
self.query = query
self.updateHandler = updateHandler
}
func index(of document: DocumentSnapshot) -> Int? {
for i in 0 ..< documents.count {
if documents[i].documentID == document.documentID {
return i
}
}
return nil
}
func listen() {
guard listener == nil else { return }
listener = query.addSnapshotListener { [unowned self] querySnapshot, error in
guard let snapshot = querySnapshot else {
print("Error fetching snapshot results: \(error!)")
return
}
let models = snapshot.documents.map { (document) -> T in
if let model = T(dictionary: document.data()) {
return model
} else {
// handle error
fatalError("Unable to initialize type \(T.self) with local dictionary \(document.data())")
}
}
self.items = models
self.documents = snapshot.documents
self.updateHandler(snapshot.documentChanges)
}
}
func stopListening() {
listener = nil
}
deinit {
stopListening()
}
}
fatalError: "Unable to initialize type Restaurant with dictionary [(name: "test", availability: "test", category: "test")]
Seems pretty straightforward - that dictionary does not contain enough information to create a Restaurant object.
The error is from
if let model = Restaurant(dictionary: document.data()) {
return model
} else {
// Don't use fatalError here in a real app.
fatalError("Unable to initialize type \(Restaurant.self) with dictionary \(document.data())")
}
because your initializer returns a nil value, from:
init?(dictionary: [String : Any]) {
guard let name = dictionary["name"] as? String,
let category = dictionary["category"] as? String,
let availability = dictionary["availability"] as? String,
let description = dictionary["description"] as? String
else { return nil }
self.init(name: name,
category: category,
availability: availability,
description: description
)
}
because your guard is returning nil because you do not have a description key in the dictionary.
To fix, either put a description key in the dictionary OR change your initializer to use a default description when the key is missing.
For example, here is your initializer, rewritten to use a default description, for when the description entry is missing
init?(dictionary: [String : Any]) {
guard let name = dictionary["name"] as? String,
let category = dictionary["category"] as? String,
let availability = dictionary["availability"] as? String
else { return nil }
let description = dictionary["description"] as? String
let defaultDescription: String = description ?? "No Description"
self.init(name: name,
category: category,
availability: availability,
description: defaultDescription
)
}

IGListKit insert data to class from Alamofire request

So i have this model
class Event: NSObject {
var _eventName: String!
var _venueName : String!
var _eventImage: String!
var eventName: String {
if _eventName == nil {
_eventName = ""
}
return _eventName
}
var venueName: String {
if _venueName == nil {
_venueName = ""
}
return _venueName
}
var eventImage: String {
if _eventImage == nil {
_eventImage = ""
}
return _eventImage
}
init(eventsDict: Dictionary<String, AnyObject>) {
if let venue = eventsDict["venue"] as? Dictionary<String, AnyObject> {
if let venuname = venue["name"] as? String{
self._venueName = venuname
}
if let eventname = eventsDict["name"] as? String {
self._eventName = eventname
}
if let eventimage = eventsDict["coverPicture"] as? String {
self._eventImage = eventimage
}
}
}
And i make it IGListDiffable with this extension.
extension NSObject: IGListDiffable {
public func diffIdentifier() -> NSObjectProtocol {
return self
}
public func isEqual(toDiffableObject object: IGListDiffable?) -> Bool {
return isEqual(object)
}
}
So when I'm loading data from hardcoded code like this
var entries = [Event]()
func loadFakeEvents() {
let entries = [
Event(
eventName: "Ζωρζ Πιλαλι Και Η Soufra Band Στο AN Groundfloor - Live Stage!",
venueName: "AN Groundfloor - live stage",
eventImage: "https://scontent.xx.fbcdn.net/v/t31.0-8/s720x720/15936729_1867160333520142_8855370744955080264_o.jpg?oh=8198bc10a8ea61011d7ec1902b34aa01&oe=593D6BC4"
),
Event(
date: "2017-02-18T21:30:00+0200",
name: "Διονύσης Σαββόπουλος at Gazarte I Main Stage 18/02",
venuename: "Gazarte",
eventImage: "https://scontent.xx.fbcdn.net/v/t1.0-9/s720x720/16265335_1262826863809003_3636661375515976849_n.jpg?oh=5bb342321a65d33dbc1cc41de266b45e&oe=5907857C"
)
]
self.entries = entries
}
The events are loading fine. As they have to.
But when i'm making an alamofire request, of course, it takse some time to load the data and append them to the empty array of events.
This is the function that I have to call the events
func loadEvents() {
let parameters: Parameters = [
"Some" : "Parameters",
"Some" : "Parameters"
]
Alamofire.request(baseurl, method: .get, parameters: parameters)
.responseJSON { (responseData) -> Void in
if((responseData.result.value) != nil) {
let result = responseData.result
if let dict = result.value as? Dictionary<String, AnyObject>{
print(dict) // <-- Check this out
if let list = dict["events"] as? [Dictionary<String, AnyObject>] {
for obj in list {
let event = Event(eventsDict: obj)
self.entries.append(event)
}
}
}
}
}
}
So in the above code i have a print, which prints the json.
And in my
extension LocationViewController: IGListAdapterDataSource {
func objects(for listAdapter: IGListAdapter) -> [IGListDiffable] {
let items: [IGListDiffable] = loader.entries as [IGListDiffable]
print(items.count) // <--- another print of items that should be displayed
return items
}
func listAdapter(_ listAdapter: IGListAdapter, sectionControllerFor object: Any) -> IGListSectionController {
return NormalSectionController()
}
func emptyView(for listAdapter: IGListAdapter) -> UIView? { return nil }
}
Adapter i also print the items that should be displayed.
So when i load the fakeEvents function it prints 2 but when i load them with the normal function it prints 0 and then the JSON from the dict var from the previous code.
Normally i would reloadData() of the collection view.
But with IGListKit what is the trick of sending the Event Class to the CollectionView?
Thanks a lot for your time and i hope i'm not off topic !
Pasting my answer from this same issue on Github in case anyone finds this.
https://github.com/Instagram/IGListKit/issues/468
It looks like you're missing a call to self.adapter.performUpdates(animated: true) after the for-loop when appending to the entries dict:
func loadEvents() {
// ...
Alamofire.request(baseurl, method: .get, parameters: parameters)
.responseJSON { (responseData) -> Void in
if responseData.result.value != nil {
let result = responseData.result
if let dict = result.value as? Dictionary<String, AnyObject>{
if let list = dict["events"] as? [Dictionary<String, AnyObject>] {
for obj in list {
let event = Event(eventsDict: obj)
self.entries.append(event)
}
// missing this!
self.adapter.performUpdates(animated: true)
// missing that!
}
}
}
}
}

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