Indexpath.row repeat lead to intermittent Index out of range error - ios

Question

When tableview is first loaded, the index print(indexPath.row) shows index 0,1,2. When the tableview is loaded again the indexpath repeats itself 3 times, in the debugger it will be 0,1,2,0,1,2,0,1,2. This happens within two seconds, but if you scroll the tableview before this there is a fatal error: Index out of range error.
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! EstablishmentCell
let object = Model.sharedInstance.items[indexPath.row]
cell.venueDistance.text = object.venueDistance
cell.titleLabel.text = object.name
object.loadCoverPhoto { image in
dispatch_async(dispatch_get_main_queue()) {
cell.coverPhotoView.image = image
}
}
let myCustomSelectionColorView = UIView()
myCustomSelectionColorView.backgroundColor = UIColor(red:0.16, green:0.65, blue:0.64, alpha:1.0)
cell.selectedBackgroundView = myCustomSelectionColorView
}
}self.activityIndicatorView.stopAnimating()
return cell
}}
EDIT1:
Establishment Class
class Establishment: NSObject {
//Properties
var record: CKRecord!
var name: String!
var establishmentDescription: String!
var establishmentOpening: String!
var venueLocation: CLLocation!
weak var database: CKDatabase!
var assetCount = 0
var establishmentDistance: String!
let locationManager = CLLocationManager()
//Map Annotation Properties
// var coordinate: CLLocationCoordinate2D {
// return venueLocation.coordinate
// }
var title: String? {
return name
}
var venueDescription: String? {
return establishmentDescription
}
var venueDistance: String? {
return establishmentDistance
}
//Initializers
init(record: CKRecord, database: CKDatabase) {
self.record = record
self.database = database
//let venueLocation = record["Location"] as? CLLocation
//let location = CLLocation()
//let userLocation = CLLocation(latitude: 51.211963, longitude: -0.769298)
self.name = record["Name"] as? String
self.establishmentDescription = record["Description"] as? String
self.establishmentOpening = record["OpeningTimes"] as? String
self.venueLocation = record["Location"] as? CLLocation
let location = locationManager.location
let distanceBetween: CLLocationDistance = (venueLocation!.distanceFromLocation(location!))
self.establishmentDistance = String(format: "%.f", distanceBetween)
}
func fetchPhotos(completion: (assets: [CKRecord]!) ->()) {
let predicate = NSPredicate(format: "Establishment == %#", record)
let query = CKQuery(recordType: "EstablishmentPhoto", predicate: predicate)
// Intermediate Extension Point - with cursors
database.performQuery(query, inZoneWithID: nil) { [weak self] results, error in
defer {
completion(assets: results)
}
guard error == nil,
let results = results else {
return
}
self?.assetCount = results.count
}
}
func loadCoverPhoto(completion:(photo: UIImage!) -> ()) {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0)) {
var image: UIImage!
defer {
completion(photo: image)
}
guard let asset = self.record["CoverPhoto"] as? CKAsset,
path = asset.fileURL.path,
imageData = NSData(contentsOfFile: path) else {
return
}
image = UIImage(data: imageData)
}
}
Model Class:
protocol ModelDelegate {
func errorUpdating(error:NSError)
func modelUpdated() class Model{
//Properties
let EstablishmentType = "Establishment"
static let sharedInstance = Model()
var delegate: ModelDelegate?
var items: [Establishment] = []
let userInfo: UserInfo
let locationManager = CLLocationManager()
var latitude : String!
var longitude : String!
var isLoading = Bool()
//Define Databases
// Represents the default container specified in the iCloud section of the Capabilities tab for the project.
let container: CKContainer
let publicDB: CKDatabase
let privateDB: CKDatabase
//Indicator
// Ask for Authorisation from the User.
func requestLocation() {
self.locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
self.locationManager.distanceFilter = 10
self.locationManager.startUpdatingLocation()
// Check if this app has permission to use location services
let authorizationStatus:CLAuthorizationStatus = CLLocationManager.authorizationStatus()
if authorizationStatus == CLAuthorizationStatus.Denied {
// TODO: Tell user that app functionality may be limited
}
else if authorizationStatus == CLAuthorizationStatus.NotDetermined {
// Manually prompt the user for permission
self.locationManager.requestWhenInUseAuthorization()
}
else if authorizationStatus == CLAuthorizationStatus.AuthorizedWhenInUse {
self.locationManager.startUpdatingLocation()
}
}
//Initializers
init () {
container = CKContainer.defaultContainer()
publicDB = container.publicCloudDatabase
privateDB = container.privateCloudDatabase
userInfo = UserInfo(container: container)
}
#objc func refresh() {
let location = locationManager.location
let radius = CGFloat(1000)
let predicate = NSPredicate(format: "distanceToLocation:fromLocation:(%K,%#) < %f", "Location", location!, radius)
let query = CKQuery(recordType: "Establishment", predicate: predicate)
let sort = CKLocationSortDescriptor(key: "Location", relativeLocation: location!)
query.sortDescriptors = [sort]
publicDB.performQuery(query, inZoneWithID: nil) { [unowned self] results, error in
guard error == nil else {
dispatch_async(dispatch_get_main_queue()) {
self.delegate?.errorUpdating(error!)
print("Cloud Query Error - Refresh: \(error)")
}
return
}
self.items.removeAll(keepCapacity: true)
for record in results! {
let establishment = Establishment(record: record, database: self.publicDB)
self.items.append(establishment)
}
dispatch_async(dispatch_get_main_queue()) {
self.delegate?.modelUpdated()
}
}
}
func establishment(ref: CKReference) -> Establishment! {
let matching = items.filter { $0.record.recordID == ref.recordID }
return matching.first
}}

Answer 1

Mention all datasource method here which are added in your code .
And also check your following method :
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return Model.sharedInstance.items.count
}