searchDisplayController, UITableView, Core Data and Swift - uitableview

Question

Trying to search in the table with searchDisplayController. Data filtering configured, the search dialog works. Now I want to work with a method prepareForSegue for send current value indexPath to a new UIViewController:
import UIKit
import CoreData
class MainTableViewController: UITableViewController {
var results:AddrBook[]=[]
var searchResults:AddrBook[]=[]
init(style: UITableViewStyle) {
super.init(style: style)
}
init(coder aDecoder: NSCoder!) {
super.init(coder: aDecoder)
}
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
override func viewDidAppear(animated: Bool) {
let request = NSFetchRequest(entityName: "Person")
request.returnsObjectsAsFaults = false
let appDelegate:AppDelegate = (UIApplication.sharedApplication().delegate as AppDelegate)
let context:NSManagedObjectContext = appDelegate.managedObjectContext
results = context.executeFetchRequest(request, error: nil) as AddrBook[]
self.tableView.reloadData()
}
override func numberOfSectionsInTableView(tableView: UITableView?) -> Int {
return 1
}
override func tableView(tableView: UITableView!, numberOfRowsInSection section: Int) -> Int {
if tableView == self.searchDisplayController.searchResultsTableView {
return searchResults.count
} else {
return results.count
}
}
override func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell! {
var cell = tableView.dequeueReusableCellWithIdentifier("Cell") as? UITableViewCell
if !cell {
cell = UITableViewCell(style: UITableViewCellStyle.Value1, reuseIdentifier: "Cell")
}
if tableView == self.searchDisplayController.searchResultsTableView {
cell!.textLabel.text = searchResults[indexPath.row].lastname + " " + searchResults[indexPath.row].firstname
cell!.detailTextLabel.text = searchResults[indexPath.row].phonenumber
} else {
cell!.textLabel.text = results[indexPath.row].lastname + " " + results[indexPath.row].firstname
cell!.detailTextLabel.text = results[indexPath.row].phonenumber
}
return cell
}
override func tableView(tableView: UITableView!, didSelectRowAtIndexPath indexPath: NSIndexPath!) {
if tableView == self.searchDisplayController.searchResultsTableView {
self.performSegueWithIdentifier("editPerson", sender : self)
}
}
override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject?) {
var indexPath = NSIndexPath()
if self.tableView == self.searchDisplayController.searchResultsTableView {
NSLog("Trying recieve indexPath from Search")
indexPath = self.searchDisplayController.searchResultsTableView.indexPathForSelectedRow()
NSLog("indexPath from Search")
}
else {
indexPath = self.tableView.indexPathForSelectedRow()
NSLog("IndexPath from main table")
}
let destViewController:DetailViewController! = segue.destinationViewController as DetailViewController
if segue.identifier == "editPerson" {
destViewController.receivedPerson = results
destViewController.indexPath = indexPath
NSLog("Selected person ID: \(results[indexPath.row].idperson)")
}
}
override func tableView(tableView: UITableView?, canEditRowAtIndexPath indexPath: NSIndexPath?) -> Bool {
return true
}
override func tableView(tableView: UITableView!, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath!) {
let request = NSFetchRequest(entityName: "Person")
request.returnsObjectsAsFaults = false
let appDelegate:AppDelegate = (UIApplication.sharedApplication().delegate as AppDelegate)
let context:NSManagedObjectContext = appDelegate.managedObjectContext
if editingStyle == .Delete {
context.deleteObject(results[indexPath.row])
context.save(nil)
}
results.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
}
func filterContentForSearchText (searchText: String) {
searchResults = results.filter{
($0.lastname as NSString).localizedCaseInsensitiveContainsString("\(searchText)")
}
}
func searchDisplayController(controller: UISearchDisplayController!, shouldReloadTableForSearchString searchString: String!) -> Bool {
self.filterContentForSearchText (searchString)
return true
}
}
In the functions prepareForSegue condition self.tableView == self.searchDisplayController.searchResultsTableView is not fulfilled.
Always assigns indexPath = self.tableView.indexPathForSelectedRow() instead indexPath = self.searchDisplayController.searchResultsTableView.indexPathForSelectedRow(). This causes an error in case of selecting a row in the search result.
Link to project on Dropbox: https://www.dropbox.com/s/bqv46nkoa4s3ibg/lesson-12-2-swift%203.zip

Answer 1

self.tableView is the main table view, so the condition
if self.tableView == self.searchDisplayController.searchResultsTableView
will never be true. But you can check if the search is active or not:
if self.searchDisplayController.active {
// index path from search table ...
} else {
// index path from main table ...
}