Good day! I'm using Parse in my swift project, Now my problem is loading and saving the query or objects to the localDataStore, I tried this method
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath, object: PFObject?) -> PFTableViewCell {
var cell = tableView.dequeueReusableCellWithIdentifier("Cell") as CustomPFTableViewCell!
if cell == nil {
cell = CustomPFTableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "Cell")
}
// Extract values from the PFObject to display in the table cell
if let placeName = object?["placeName"] as? String {
cell.cellName.text = placeName
}
if let station = object?["station"] as? String {
cell.cellDetail.text = station
}
if let placeImg = object?["placeImg"] as? String {
let decodedData = NSData(base64EncodedString: placeImg, options: NSDataBase64DecodingOptions(rawValue: 0))
// var decodedimage = UIImage(data: decodedData!)
var finImage = UIImage(data: decodedData!)
cell.cellBgImg.image = finImage
}
PFObject.pinAllInBackground(self.objects, block: { (succeeded, error) -> Void in
if (error == nil) {
}else {
println(error!.userInfo)
}
})
return cell
}
now in my queryForTable method i have this
override func queryForTable() -> PFQuery {
// Start the query object
var query = PFQuery(className: "Places")
// Add a where clause if there is a search criteria
if searchBar.text != "" {
query.whereKey("filterKeyword", containsString: searchBar.text.lowercaseString)
}
// Order the results
query.orderByAscending("placeName")
var cReturn = PFQuery()
if (IJReachability.isConnectedToNetwork()) {
cReturn = query
} else {
cReturn = query.fromLocalDatastore()
}
return cReturn
}
As you can see, I'm using Reachability to check if the device is connected to the internet. If not, The query will return query.fromLocalDataStore and if the device is connected it will return the normal query to get the latest data.
Now, my problem is when I'm turning off the internet to test it, it gives me an error 'Method requires Pinning enabled.' which i already did in tableView method
PFObject.pinAllInBackground(self.objects, block: { (succeeded, error) -> Void in
if (error == nil) {
}else {
println(error!.userInfo)
}
})
What do you think I did wrong? Thanks!
I think you should put the method where you pin the objects inside your objectsDidLoad() method and not in your cellForRowAtindexPath() method.
Related
I use the realm database for my application (to-do list), everything works fine, BUT once I flew to another country and noticed that the records in the database are empty (the application gives out an empty list), upon arrival back to my country everything returned to normal ... Now I am again in a different country and the situation repeats again (database is empty), for some reason the database gives an empty list result, can you please explain why this is happening and how to fix that?
Output example
var dbToDoList = DBrealmToDoList()
var arrayToDoList: Results<RealmToDoList> {
get {
return dbToDoList.getArray()
}
}
override func viewDidLoad() {
super.viewDidLoad()
let realm = try! Realm()
dbToDoList.realm = realm
let current = arrayToDoList.filter { (_todo) -> Bool in
return _todo.date == date
}.first
self.selectedDate = date
if current != nil {
self.selectedLists = current?.lists
self.selectedListsSorted = self.selectedLists?.sorted(by: { (val, val2) -> Bool in
return (!val.value && val2.value)
})
}
}
And then in tableView I display the data from the selectedListsSorted
// MARK: UITableView
extension ToDoListViewController : UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return selectedListsSorted?.count ?? 0
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! ToDoListTableViewCell
let current = selectedListsSorted?[indexPath.row]
cell.nameLabel.text = current?.key
cell.checkBox.isSelected = current?.value ?? false
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 90
}
}
Here is a class for working with db
class RealmToDoList: Object {
#objc private dynamic var dictionaryData: Data?
var lists: [String: Bool] {
get {
guard let dictionaryData = dictionaryData else {
return [String: Bool]()
}
do {
let dict = try JSONSerialization.jsonObject(with: dictionaryData, options: []) as? [String: Bool]
return dict!
} catch {
return [String: Bool]()
}
}
set {
do {
let data = try JSONSerialization.data(withJSONObject: newValue, options: [])
dictionaryData = data
} catch {
dictionaryData = nil
}
}
}
#objc dynamic var date : Date?
}
class DBrealmToDoList {
var realm: Realm!
func write(_ data: RealmToDoList) throws -> Bool {
var result = false
if (realm != nil) {
try! realm.write {
realm.add(data)
result = true
}
return result
} else {
throw RuntimeError.NoRealmSet
}
}
func getArray() -> Results<RealmToDoList> {
return realm.objects(RealmToDoList.self)
}
func delete(_ data: RealmToDoList) throws -> Bool {
var result = false
if (realm != nil) {
try! self.realm.write {
self.realm.delete(data)
result = true
}
return result
} else {
throw RuntimeError.NoRealmSet
}
}
func update(ofType:Object,value:AnyObject,key:String)->Bool{
do {
let realm = try Realm()
try realm.write {
ofType.setValue(value, forKeyPath: key)
}
return true
}catch let error as NSError {
fatalError(error.localizedDescription)
}
}
func filter(id:Int) -> RealmToDoList? {
let match = realm.objects(RealmToDoList.self).filter("id == %#",id).first
return match
}
func newToDoList(date : Date?,lists: [String: Bool]) -> RealmToDoList{
let pill = RealmToDoList()
pill.date = date
pill.lists = lists
return pill
}
}
I doubt that the matter is in the database, but I cannot understand what it is, because I don’t do a filter by country, etc.
The issue is the date because the date will change based on time zone and if you're selecting today's date/time in one time zone, it will be different that's what's in the database. So if a filter is based on this date
#objc dynamic var date : Date?
then that date will be "today" for whatever time zone you're in but a "today" date that was created this morning in a different time zone will not return the current time zones date.
e.g. if you create a new date/time it will be today in this timezone but could be yesterday in a different time zone.
I'm making an app with a tableview and search controller using the rick and morty API, https://rickandmortyapi.com/api/character/. The API is paged and I'm able to parse the data from the first page and display it to my tableview. I'm also able get the other pages of the API when I scroll through the tableview. I can't seem to figure out how to parse all the data from the pages at once. When I use the search controller I can't search for all the characters, until I scroll through the tableView to get all of the characters. I want to be able to search for any character without having to scroll through the tableView first. How would I parse all the data from the different pages at once and display the data to the tableview? Any help is appreciated, thank you!
This is my current code for parsing the data and getting the other pages when scrolling through the tableView
func getIntitalRickAndMortyData(){
downloadedDataArray = []
//here first page is next page
nextPageUrl = "https://rickandmortyapi.com/api/character/"
getRickAndMortyData()
filteredCharacterArray = downloadedDataArray
}
func getRickAndMortyData() {
//construct the url, use guard to avoid nonoptional
guard let urlObj = URL(string: nextPageUrl) else
{ return }
//fetch data
URLSession.shared.dataTask(with: urlObj) {[weak self](data, response, error) in
//to avoid non optional in JSONDecoder
guard let data = data else { return }
do {
//decode object
let downloadedRickAndMorty = try JSONDecoder().decode(PagedCharacters.self, from: data)
self?.downloadedDataArray.append(contentsOf: downloadedRickAndMorty.results)
self?.nextPageUrl = downloadedRickAndMorty.info.next
self?.filteredCharacterArray = (self?.downloadedDataArray)!
self?.currentPage += 1
DispatchQueue.main.async {
self?.tableView.reloadData()
}
//print(self?.aryDownloadedData as Any)
} catch {
print(error)
}
}.resume()
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let count = self.downloadedDataArray.count
if count > 1 {
let lastElement = count - 1
if indexPath.row == lastElement {
//call get api for next page
getRickAndMortyData()
}
}
guard let cell = tableView.dequeueReusableCell(withIdentifier: "rickandmortyCell") as? CharacterTableViewCell else { return UITableViewCell() }
let results: Results
if isFiltering() {
results = filteredCharacterArray[indexPath.row]
} else {
results = downloadedDataArray[indexPath.row]
}
cell.selectionStyle = .none
cell.nameLabel.text = results.name
cell.statusLabel.text = results.status
cell.genderLabel.text = results.gender
cell.originLabel.text = results.origin.name
cell.lastlocationLabel.text = results.location.name
let id = String(results.id)
cell.idLabel.text = id
return cell
}
}
I've tried doing it using a while loop and keeping a current page count and incrementing it, but nothing displays and I get this in my console "XPC connection interrupted"
func getAllRickAndMortyData() {
while currentPage <= 25 {
getRickAndMortyData()
}
}
I'm clueless as to what is wrong. My console doesn't give me any errors, my code seems fine but nothing is showing up. Could someone check my code, see why it doesn't want to work? My tableView is connected with its delegates and source. Not sure what is the problem.
Here is my code:
private let cellIdentifier = "cell"
private let apiURL = "api link"
class TableView: UITableViewController {
//TableView Outlet
#IBOutlet weak var LegTableView: UITableView!
//API Array
var legislatorArray = [congressClass]()
func getLegislators (fromSession session: NSURLSession) {
//Calling url
if let jsonData = NSURL(string: apiURL) {
// Requesting url
let task = session.dataTaskWithURL(jsonData) {(data, response, error) -> Void in
//Check for errors
if let error = error {print(error)
} else {
if let http = response as? NSHTTPURLResponse {
if http.statusCode == 200 {
//Getting data
if let data = data {
do {
let legislatorData = try NSJSONSerialization.JSONObjectWithData(data, options: .MutableContainers)
//Get API data
if let getData = legislatorData as? [NSObject:AnyObject],
findObject = getData["results"] as? [AnyObject]{
//Return data
for cellFound in findObject{
if let nextCell = cellFound["results"] as? [NSObject:AnyObject],
name = nextCell["first_name"] as? String,
lastName = nextCell["last_name"] as? String,
title = nextCell["title"] as? String,
partyRep = nextCell["party"] as? String,
position = nextCell ["position"] as? String,
id = nextCell ["bioguide_id"] as? String
{
//Add data to array
let addData = congressClass(name: name, lastName: lastName, title: title, party: partyRep, position: position, bioID: id)
self.legislatorArray.append(addData)
}
}//end cellFound
//Adding data to table
dispatch_async(dispatch_get_main_queue()) { () -> Void in
self.tableView.reloadData()
}
}
}
//end do
catch {print(error)}
}//end data
}//end statusCode
}//end http
}//else
}//end task
//Run code
task.resume()
}//end jsonData
}
override func viewDidLoad() {
super.viewDidLoad()
let sessionConfig = NSURLSessionConfiguration.defaultSessionConfiguration()
let urlSession = NSURLSession(configuration: sessionConfig)
getLegislators(fromSession: urlSession)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
//TableView Rows
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return legislatorArray.count
//return 5
}
//Cell Configuration
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as! CellTableView
cell.lesName?.text = legislatorArray[indexPath.row].name + " " + legislatorArray[indexPath.row].lastName
cell.lesTitle?.text = legislatorArray[indexPath.row].title
cell.lesParty?.text = legislatorArray[indexPath.row].party
//These tests worked fine.. the tableView is working. But the data doesn't seem to pass.
//cell.lesName.text = "Name" + " " + "lastName"
//cell.lesTitle.text = "Title goes here"
//cell.lesParty.text = "D"
return cell
}
}
You're not reloading the tableView
The problem is in this piece of code
//-----------------------------
//New empty array for api data
var indexPath:[NSIndexPath] = []
//Adding data to new array
for i in 0..<self.legislatorArray.count{
let secondIndexPath = NSIndexPath(forRow: i, inSection: 0)
indexPath.append(secondIndexPath)
}
//Adding data to table
dispatch_async(dispatch_get_main_queue()) { () -> Void in
self.tableView.insertRowsAtIndexPaths(indexPath, withRowAnimation: .Left)
}
You don't need any of that. You can just reload the tableView as follows:
//Adding data to table
dispatch_async(dispatch_get_main_queue()) { () -> Void in
//You only need to reload it and that should do the trick
self.tableView.reloadData()
}
I know you said your tableView is connected to the delegate and dataSource but it's not showing in your code.
You conformed the ViewController to the correct protocols but you need something like this in your viewDidLoad.
self.tableView.deletage = self
self.tableView.dataSource = self
//I don't know if this was a typo but in your cellForRowAtIndexPath you are using CellTableView
let nibName = UINib(nibName: "CellTableView", bundle:nil)
self.tableView.registerNib(nibName, forCellReuseIdentifier: cellIdentifier)
I created an example of a better design for your implementation
This is for the WebService and your Custom Class
https://github.com/phantomon/Stackoverflow/blob/master/SO1/MyTableView/MyTableView/Models/WebServiceManager.swift
This is for the ViewController with your tableView
https://github.com/phantomon/Stackoverflow/blob/master/SO1/MyTableView/MyTableView/ViewController.swift
You just need to modify the UITableViewCell with your custom one.
And of course review your custom class data.
Tried so many times to find out what causes the fatal error. But, still can't figure it out. The first table (result table) causes this error when I try to refresh the table with pull. The second table (favoriteProductTableView) works perfect, so I didn't put any code about the second one. Wondering why. Thank you for your help.
var followArray = [String]()
var resultsNameArray = [String]()
var resultsImageFiles = [PFFile?]()
var resultsDetailsArray = [String]()
var resultsDetailsImageFiles = [PFFile?]()
var resultsObjectID = [String]()
var resultsTitle = [String]()
var personPriceArray = [String]()
var personQuantityArray = [String]()
var personOrderTypeArray = [String]()
var refresher:UIRefreshControl!
override func viewDidLoad() {
super.viewDidLoad()
favoriteProductTableView.hidden = true
refresher = UIRefreshControl()
refresher.tintColor = UIColor.blackColor()
refresher.addTarget(self, action: "refresh", forControlEvents: UIControlEvents.ValueChanged)
self.resultsTable.addSubview(refresher)
}
override func viewDidAppear(animated: Bool) {
refreshResults()
}
func refresh(){
refreshResults()
}
func refreshResults(){
switch(segmentedControl.selectedSegmentIndex){
case 0:
followArray.removeAll(keepCapacity: false)
resultsNameArray.removeAll(keepCapacity: false)
resultsImageFiles.removeAll(keepCapacity: false)
resultsDetailsArray.removeAll(keepCapacity: false)
resultsDetailsImageFiles.removeAll(keepCapacity: false)
resultsObjectID.removeAll(keepCapacity: false)
resultsTitle.removeAll(keepCapacity: false)
personPriceArray.removeAll(keepCapacity: false)
personQuantityArray.removeAll(keepCapacity: false)
personOrderTypeArray.removeAll(keepCapacity: false)
let followQuery = PFQuery(className: "follow")
followQuery.whereKey("user", equalTo: (PFUser.currentUser()!.username)!)
followQuery.whereKey("userToFollow", notEqualTo: (PFUser.currentUser()!.username)!)
followQuery.findObjectsInBackgroundWithBlock { (objects:[PFObject]?, error: NSError?) -> Void in
if error != nil {
}
for object in objects! {
self.followArray.append(object.objectForKey("userToFollow") as! String)
}
let query = PFQuery(className: "products")
query.whereKey("userName", containedIn: self.followArray)
query.findObjectsInBackgroundWithBlock { (catchobjects:[PFObject]?, error:NSError?) -> Void in
if error != nil {
}
for catchobject in catchobjects! {
if catchobject.objectForKey("selling_price") != nil {
self.personPriceArray.append(catchobject.objectForKey("selling_price") as! String)
self.personOrderTypeArray.append("Selling")
} else {
self.personPriceArray.append(catchobject.objectForKey("buying_price") as! String)
self.personOrderTypeArray.append("Buying")
}
self.personQuantityArray.append(catchobject.objectForKey("quantity") as! String)
self.resultsNameArray.append(catchobject.objectForKey("unique_username") as! String)
self.resultsImageFiles.append(catchobject.objectForKey("profile_picture") as? PFFile)
self.resultsDetailsArray.append(catchobject.objectForKey("details") as! String)
self.resultsDetailsImageFiles.append(catchobject.objectForKey("detailsImage") as? PFFile)
self.resultsTitle.append(catchobject.objectForKey("title") as! String)
self.resultsObjectID.append(catchobject.objectId!)
}
dispatch_async(dispatch_get_main_queue()) {
self.resultsTable.reloadData()
}
self.loadEmptyLabel(self.resultsTable)
}
self.refresher.endRefreshing()
}
break
case 1:
...
break
default:
break
}
}
func loadEmptyLabel(tableView: UITableView) {
let emptyLabel = UILabel(frame: CGRectMake(0, 0, UIScreen.mainScreen().bounds.width, UIScreen.mainScreen().bounds.height))
emptyLabel.textAlignment = NSTextAlignment.Center
emptyLabel.textColor = UIColor.blackColor()
emptyLabel.text = "No matched result found."
tableView.backgroundView = emptyLabel
tableView.separatorStyle = UITableViewCellSeparatorStyle.None
var resultCount = Int()
if tableView == resultsTable {
resultCount = resultsNameArray.count
} else {
resultCount = resultsTitleArray.count
}
if resultCount == 0 {
tableView.reloadData()
emptyLabel.hidden = false
} else {
emptyLabel.hidden = true
}
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
var numRow: Int = 0
switch(segmentedControl.selectedSegmentIndex){
case 0:
numRow = resultsNameArray.count
break
case 1:
numRow = resultsTitleArray.count
break
default:
break
}
return numRow
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
if tableView == resultsTable {
let cell:favoritedTableViewCell = resultsTable.dequeueReusableCellWithIdentifier("Cell") as! favoritedTableViewCell
cell.profileLbl.text = self.resultsNameArray[indexPath.row]
cell.messageTxt.text = self.resultsDetailsArray[indexPath.row]
cell.priceLabel.text = "\(self.personOrderTypeArray[indexPath.row]) \(self.personQuantityArray[indexPath.row]) for $\(self.personPriceArray[indexPath.row])"
cell.titleLabel.text = self.resultsTitle[indexPath.row]
if resultsImageFiles[indexPath.row] != nil {
resultsImageFiles[indexPath.row]!.getDataInBackgroundWithBlock { (imageData:NSData?, error:NSError?) -> Void in
if error == nil{
let image = UIImage(data: imageData!)
cell.imgView.image = image
}
}
} else {
cell.imgView.image = UIImage(named: "Profile Picture")
}
if resultsDetailsImageFiles[indexPath.row] != nil{
resultsDetailsImageFiles[indexPath.row]?.getDataInBackgroundWithBlock({ (imageData:NSData?, error:NSError?) -> Void in
if error == nil{
let image = UIImage(data: imageData!)
cell.detailsImg.image = image
}
})
} else {
cell.detailsImg.image = UIImage(named: "Profile Picture")
}
return cell
} else {
....
}
}
Your numberOfRowsInSection function returns one of two array lengths based on segmentedControl.selectedSegmentIndex, whereas cellForRowAtIndexPath indexes the arrays based on the tableView being displayed. This doesn't look right, especially given your referencing `` which doesn't appear to be populated anywhere - should it just be resultsTitle?.
Also, you're calling self.resultsTable.reloadData() from a background thread. This is bad - it must be called from the main thread using:
dispatch_async(dispatch_get_main_queue()) {
self.resultsTable.reloadData()
}
Nevertheless, it's not clear why you've got this inside the loop either.
I'm trying to get some strings and one photo from parse.com for tableview. I have an NSObject for this class and also an array of object to store them. I can get the newsTitle and the newsDetail in correct order by got fail when try to get newsPhoto. I suppose it lost its order when try get get images in block. Does anybody know what should I change on below code to fix it?
func getNews(){
let query = PFQuery(className: "bulletinOnParse")
query.orderByDescending("createdAt")
query.findObjectsInBackgroundWithBlock {
(allNews: [PFObject]?, error: NSError?) -> Void in
if error == nil {
var duyuru:News
for news in allNews! {
duyuru = News()
let nTitle = news.objectForKey("title") as! String
duyuru.newsTitle = nTitle
let nDetail = news.objectForKey("comment") as! String
duyuru.newsDetail = nDetail
let imageFile = news["newsphoto"] as! PFFile
imageFile.getDataInBackgroundWithBlock {
(imageData: NSData?, error: NSError?) -> Void in
if error == nil {
if let imageData = imageData {
let image = UIImage(data:imageData)
duyuru.newsPhoto = image!
}
}
}
self.bulletin += [duyuru]
}
} else {
// Log details of the failure
print("\(error!.userInfo)")
}
self.tableView.reloadData()
}
}
And cellForRowAtIndexPath method below
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! DuyuruTableViewCell
self.tableView.rowHeight = 100
let cellInfo = bulletin[indexPath.row]
cell.newsTitle.text = cellInfo.newsTitle
cell.news.text = cellInfo.newsDetail
dispatch_async(dispatch_get_main_queue(), {
cell.newsPhoto.image = cellInfo.newsPhoto
})
return cell
}
Here is the answer of how I solve the problem;
First I created an image array from PFFile object
var resultUserImageFiles = [PFFile]()
Then I get the name and add the array on getNews() method
self.resultUserImageFiles.append(news.objectForKey("newsphoto") as! PFFile)
And I get each photo for cell on below method in cellForRowAtIndexPath method.
self.resultUserImageFiles[indexPath.row].getDataInBackgroundWithBlock { (imageData: NSData?, error:NSError?) -> Void in
if error == nil {
let image = UIImage(data: imageData!)
cell.newsPhoto.image = image
}
}