Swift filter UITableView with out search bar - uitableview

Question

I have a UITableView that I want to filter based on a selection from slide panel view controller. This is the function that gets the returned value form the panel.
func itemSelected(type: Item) {
self.selectedItem = Item.title
delegate?.collapseSidePanels?()
}
Table view code.
var myData: Array<AnyObject> = []
var selectedItem:Array<AnyObject> = []
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cellID: NSString = "Cell"
var Cell: UITableViewCell = tableView.dequeueReusableCellWithIdentifier(cellID as String) as! UITableViewCell
var data: NSManagedObject = myData[indexPath.row] as! NSManagedObject
if tableView == selectedItem {
data = self.selectedItem[indexPath.row] as! NSManagedObject
} else
{
data = myData[indexPath.row] as! NSManagedObject
}
Cell.textLabel?.text = data.valueForKeyPath("itemname") as? String
var tt = data.valueForKeyPath("itemtype") as! String
Cell.detailTextLabel?.text = ("Item Type: \(tt)")
return Cell
}
I need to filter on the itemtype.
edit - Will not filter still so here is the full code for the tableViewController.
import UIKit
import CoreData
import Foundation
#objc
protocol tableViewControllerDelegate {
optional func toggleLeftPanel()
optional func toggleRightPanel()
optional func collapseSidePanels()
}
class tableViewController: UITableViewController, NSFetchedResultsControllerDelegate, SidePanelViewControllerDelegate {
var delegate: tableViewControllerDelegate?
var myData: Array<AnyObject> = []
var myFilteredData: Array<AnyObject> = []
#IBAction func leftTapped(sender: AnyObject) {
delegate?.toggleLeftPanel?()
}
// Use this to change table view to edit mode
// and to Change the title when clicked on.
// Make sure to have sender set as UIBarButtonItem
// or you can not change the title of the button.
var condition: Bool = true
#IBAction func buttonEdit(sender: UIBarButtonItem) {
if(condition == true) {
tableView.editing = true
sender.title = "Done"
condition = false
} else {
tableView.editing = false
sender.title = "Edit"
condition = true
}
}
let managedObjectContext = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext
var fetchedResultController: NSFetchedResultsController = NSFetchedResultsController()
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewWillAppear(animated: Bool) {
// This is neeed when using panel view controller to show the bottom navbar.
self.navigationController?.setToolbarHidden(false, animated: true)
// ref app del
let appDel: AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
// Ref data
let context: NSManagedObjectContext = appDel.managedObjectContext!
let freq = NSFetchRequest(entityName: "Products")
myData = context.executeFetchRequest(freq, error: nil)!
}
override func viewDidAppear(animated: Bool) {
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Potentially incomplete method implementation.
// Return the number of sections.
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete method implementation.
// Return the number of rows in the section.
if (self.myFilteredData.count != 0) {
return self.myFilteredData.count
} else {
return self.myData.count
}
}
func getFetchedResultController() -> NSFetchedResultsController {
fetchedResultController = NSFetchedResultsController(fetchRequest: NSFetchRequest(), managedObjectContext: managedObjectContext!, sectionNameKeyPath: nil, cacheName: nil)
return fetchedResultController
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cellID: String = "Cell"
var cell: UITableViewCell = tableView.dequeueReusableCellWithIdentifier(cellID as String) as! UITableViewCell
var data: NSManagedObject
if (self.myFilteredData.count != 0){
data = myFilteredData[indexPath.row] as! NSManagedObject
cell.textLabel?.text = data.valueForKeyPath("productname") as? String
var tt = data.valueForKeyPath("itemtype") as! String
cell.detailTextLabel?.text = ("Item J Type: \(tt)")
} else {
data = myData[indexPath.row] as! NSManagedObject
cell.textLabel?.text = data.valueForKeyPath("productname") as? String
var tt = data.valueForKeyPath("itemtype") as! String
cell.detailTextLabel?.text = ("Item Type: \(tt)")
}
return cell
}
override func tableView(tableView: UITableView, canMoveRowAtIndexPath indexPath: NSIndexPath) -> Bool {
return true
}
override func tableView(tableView: UITableView, moveRowAtIndexPath sourceIndexPath: NSIndexPath, toIndexPath destinationIndexPath: NSIndexPath) {
let item: AnyObject = myData[sourceIndexPath.row]
myData.removeAtIndex(sourceIndexPath.row)
myData.insert(item, atIndex: destinationIndexPath.row)
}
// called when a row deletion action is confirmed
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
switch editingStyle {
case .Delete:
// remove the deleted item from the model
let appDel:AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
let context:NSManagedObjectContext = appDel.managedObjectContext!
context.deleteObject(myData[indexPath.row] as! NSManagedObject)
myData.removeAtIndex(indexPath.row)
context.save(nil)
// remove the deleted item from the `UITableView`
self.tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
default:
return
}
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if (segue.identifier == "showProduct"){
let selectedIndexPath:NSIndexPath = self.tableView.indexPathForSelectedRow()!
let genView:genViewController = segue.destinationViewController as! genViewController
genView.row = selectedIndexPath.row
}
else if (segue.identifier == "addProduct"){
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func itemSelected(item: Type) {
var selectedType = item.title
delegate?.collapseSidePanels?()
for (key, value) in enumerate(self.myData) {
if (value.valueForKeyPath("itemtype") !== "selectedType") {
self.myFilteredData.append(value)
dump(myFilteredData)
} else {
// do nothing with it
}
}
tableView.reloadData()
}
}

Answer 1

Depending on however you want the data filtered, you could loop through myData in itemSelected(), find the elements that you want in your filtered list and save them in a new array (myFilteredData).
var myFilteredData: Array<AnyObject> = []
func itemSelected(type: Item) {
self.selectedItem = Item.title
delegate?.collapseSidePanels?()
for (key, value) in enumerate(self.myData) {
if (value.valueForKeyPath("itemtype") == "yourCondition") {
self.myFilteredData.append(value)
} else {
// do nothing with it
}
}
tableView.reloadData() // use tableView.reloadSections with rowAnimation for better effect.
}
You would then reload the tableview with tableView.reloadSections(_ sections: NSIndexSet,
withRowAnimation animation: UITableViewRowAnimation), which will trigger the cellForRowAtIndexPath function. Here, you would need to decide if you want to use myData or myFilteredData for the cell's labels.
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
...
var data:NSManagedObject
if (self.myFilteredData.count != 0) {
data = myFilteredData[indexPath.row] as! NSManagedObject
} else {
data = myData[indexPath.row] as! NSManagedObject
}
...
}
Also, don't forget to modify the numberOfRowsInSection function to return the size of the array you are populating the tableView with.
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if (self.myFilteredData.count != 0) {
return self.myFilteredData.count
} else {
return self.myData.count
}
}