Attached at very bottom of this question is my inventory controller file. My problem is I'm getting duplicate results in all the sections. I narrowed down the reason to
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
My code in that function does not account for how many rows there are in each section. As such I'm just printing out the same duplicate results every section.
The actual question is listed after the images below...
Refer to images below:
I also have the ability to change the index from my settings menu so it can index by numbers, like 0-9. Refer to image below:
That said, I currently load the data from Core Data. Attached is reference image of the entities I use and there relationships.
The Question:
My question is, how can I get the results from coreData to be sorted into the A,B,C type sections or 1,2,3 sections so that navigating the table will be simple.
My hunch is the line that says let inventoryRecords = try moc.executeFetchRequest(inventoryFetchRequest) as? [Inventory] needs a sort descriptor to sort based on how I like, but how I then take the data and put into the correct array structure to split into the sections I need...I have no idea.
globals.swift
import Foundation
import CoreData
//Array of Inventory & Store Core Data Managed Objects
var g_inventoryItems = [Inventory]()
var g_storeList = [Store]()
var g_appSettings = [AppSettings]()
var g_demoMode = false
InventoryController.swift
import UIKit
import CoreData
class InventoryController: UIViewController, UISearchBarDelegate, UITableViewDataSource, UITableViewDelegate {
@IBOutlet weak var searchBar: UISearchBar!
@IBOutlet weak var inventoryTable: UITableView!
var numberIndex = ["0","1","2","3","4","5","6","7","8","9"]
var letterIndex = ["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"]
var moc = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext //convinience variable to access managed object context
// Start DEMO Related Code
func createInventoryDummyData(number: Int) -> Inventory{
let tempInventory = NSEntityDescription.insertNewObjectForEntityForName("Inventory", inManagedObjectContext: moc) as! Inventory
tempInventory.name = "Test Item # \(number)"
tempInventory.barcode = "00000000\(number)"
tempInventory.currentCount = 0
tempInventory.id = number
tempInventory.imageLargePath = "http://website.tech//uploads/inventory/7d3fe5bfad38a3545e80c73c1453e380.png"
tempInventory.imageSmallPath = "http://website.tech//uploads/inventory/7d3fe5bfad38a3545e80c73c1453e380.png"
tempInventory.addCount = 0
tempInventory.negativeCount = 0
tempInventory.newCount = 0
tempInventory.store_id = 1 //belongs to same store for now
//Select a random store to belong to 0 through 2 since array starts at 0
let aRandomInt = Int.random(0...2)
tempInventory.setValue(g_storeList[aRandomInt], forKey: "store") //assigns inventory to one of the stores we created.
return tempInventory
}
func createStoreDummyData(number:Int) -> Store{
let tempStore = NSEntityDescription.insertNewObjectForEntityForName("Store", inManagedObjectContext: moc) as! Store
tempStore.address = "100\(number) lane, Miami, FL"
tempStore.email = "store\(number)@centraltire.com"
tempStore.id = number
tempStore.lat = 1.00000007
tempStore.lng = 1.00000008
tempStore.name = "Store #\(number)"
tempStore.phone = "123000000\(number)"
return tempStore
}
// End DEMO Related Code
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
print("InventoryController -> ViewDidLoad -> ... starting inits")
//First check to see if we have entities already. There MUST be entities, even if its DEMO data.
let inventoryFetchRequest = NSFetchRequest(entityName: "Inventory")
let storeFetchRequest = NSFetchRequest(entityName: "Store")
do {
let storeRecords = try moc.executeFetchRequest(storeFetchRequest) as? [Store]
if(storeRecords!.count<=0){
g_demoMode = true
print("No store entities found. Demo mode = True. Creating default store entities...")
var store : Store //define variable as Store type
for index in 1...3 {
store = createStoreDummyData(index)
g_storeList.append(store)
}
}
let inventoryRecords = try moc.executeFetchRequest(inventoryFetchRequest) as? [Inventory]
if(inventoryRecords!.count<=0){
g_demoMode = true
print("No entities found for inventory. Demo mode = True. Creating default entities...")
var entity : Inventory //define variable as Inventory type
for index in 1...20 {
entity = createInventoryDummyData(index)
g_inventoryItems.append(entity)
}
print("finished creating entities")
}
}catch{
fatalError("bad things happened \(error)")
}
print("InventoryController -> viewDidload -> ... finished inits!")
}
override func viewWillAppear(animated: Bool) {
print("view appearing")
//When the view appears its important that the table is updated.
//Look at the selected Store & Use the LIST of Inventory Under it.
inventoryTable.reloadData()//this is important to update correctly for changes that might have been made
}
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
print("inventoryItemControllerPrepareForSegueCalled")
if segue.identifier == "inventoryInfoSegue" {
let vc = segue.destinationViewController as! InventoryItemController
if let cell = sender as? InventoryTableViewCell{
vc.inventoryItem = cell.inventoryItem! //sets the inventory item accordingly, passing its reference along.
}else{
print("sender was something else")
}
}
}
func tableView(tableView: UITableView, sectionForSectionIndexTitle title: String, atIndex index: Int) -> Int {
//This scrolls to correct section based on title of what was pressed.
return letterIndex.indexOf(title)!
}
func sectionIndexTitlesForTableView(tableView: UITableView) -> [String]? {
//Use correct index on the side based on settings desired.
if(g_appSettings[0].indextype=="letter"){
return letterIndex
}else{
return numberIndex
}
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
//TODO: Need to figure out how many rows for ...column A,B,C or 1,2,3 based on indexType using~
//To do this we need to organize the inventory results into a section'ed array.
if(g_appSettings[0].selectedStore != nil){
return (g_appSettings[0].selectedStore?.inventories!.count)! //number of rows is equal to the selected stores inventories count
}else{
return g_inventoryItems.count
}
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("InventoryTableCell", forIndexPath: indexPath) as! InventoryTableViewCell
if(g_appSettings[0].selectedStore != nil){
//Get the current Inventory Item & Set to the cell for reference.
cell.inventoryItem = g_appSettings[0].selectedStore?.inventories?.allObjects[indexPath.row] as! Inventory
}else{
//This only happens for DEMO mode or first time.
cell.inventoryItem = g_inventoryItems[indexPath.row]//create reference to particular inventoryItem this represents.
}
cell.drawCell() //uses passed inventoryItem to draw it's self accordingly.
return cell
}
func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
if(g_appSettings[0].indextype == "letter"){
return letterIndex[section]
}else{
return numberIndex[section]
}
}
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
if(g_appSettings[0].selectedStore != nil){
if(g_appSettings[0].indextype=="letter"){
return letterIndex.count
}else{
return numberIndex.count
}
}else{
return 1//only one section for DEMO mode.
}
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
//dispatch_async(dispatch_get_main_queue()) {
//[unowned self] in
print("didSelectRowAtIndexPath")//does not recognize first time pressed item for some reason?
let selectedCell = self.tableView(tableView, cellForRowAtIndexPath: indexPath) as? InventoryTableViewCell
self.performSegueWithIdentifier("inventoryInfoSegue", sender: selectedCell)
//}
}
@IBAction func BarcodeScanBarItemAction(sender: UIBarButtonItem) {
print("test of baritem")
}
@IBAction func SetStoreBarItemAction(sender: UIBarButtonItem) {
print("change store interface")
}
func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
print("text is changing")
}
func searchBarCancelButtonClicked(searchBar: UISearchBar) {
print("ended by cancel")
searchBar.text = ""
searchBar.resignFirstResponder()
}
func searchBarSearchButtonClicked(searchBar: UISearchBar) {
print("ended by search")
searchBar.resignFirstResponder()
}
func searchBarTextDidEndEditing(searchBar: UISearchBar) {
print("ended by end editing")
searchBar.resignFirstResponder()
}
@IBAction func unwindBackToInventory(segue: UIStoryboardSegue) {
print("unwind attempt")
let barcode = (segue.sourceViewController as? ScannerViewController)?.barcode
searchBar.text = barcode!
print("barcode="+barcode!)
inventoryTable.reloadData()//reload the data to be safe.
}
}
//Extention to INT to create random number in range.
extension Int
{
static func random(range: Range<Int> ) -> Int
{
var offset = 0
if range.startIndex < 0 // allow negative ranges
{
offset = abs(range.startIndex)
}
let mini = UInt32(range.startIndex + offset)
let maxi = UInt32(range.endIndex + offset)
return Int(mini + arc4random_uniform(maxi - mini)) - offset
}
}
Update:: **
So I was looking around and found this article (I implemented it).
I'm really close now to figuring it out. Only problem is I can get it to auto create the sections, but only on another field, like for example store.name, I can't get it to section it into A,B,C sections or 1,2,3.
This is my code for the fetchedResultsController using the methods described in that article.
//Create fetchedResultsController to handle Inventory Core Data Operations
lazy var fetchedResultsController: NSFetchedResultsController = {
let inventoryFetchRequest = NSFetchRequest(entityName: "Inventory")
let primarySortDescriptor = NSSortDescriptor(key: "name", ascending: true)
let secondarySortDescriptor = NSSortDescriptor(key: "barcode", ascending: true)
inventoryFetchRequest.sortDescriptors = [primarySortDescriptor, secondarySortDescriptor]
let frc = NSFetchedResultsController(
fetchRequest: inventoryFetchRequest,
managedObjectContext: self.moc,
sectionNameKeyPath: "store.name",
cacheName: nil)
frc.delegate = self
return frc
}()
Question is what to put for sectionNameKeyPath: now that will make it section it on A B C and I got this !
Found a stackoverflow post very similar to my issue, but need swift answer.
A-Z Index from NSFetchedResultsController with individual section headers within each letter?
Here is another similar article but all objective-c answers.
NSFetchedResultsController with sections created by first letter of a string
Update::
Found another article I think with my exact issue (How to have a A-Z index with a NSFetchedResultsController)
