Как искать из таблицы, которая загружает данные из coredata

Question

Код для моего контроллера просмотра приведен ниже.

Табличное изображение загружает данные из основных данных.

Я добавил поисковую панель к viewcontroller.Can кто-нибудь поможет мне реализовать поиск в этом ?? Я смущен, глядя на учебники .please кто может обеспечить решение этой

import UIKit 

import CoreData 

class NotesListTableViewController: UITableViewController ,UISearchBarDelegate 

{ 

@IBOutlet weak var searchBar: UISearchBar! 
var managedObjectContext : NSManagedObjectContext! 
var entries: [NSManagedObject]! 
override func viewDidLoad() 
{ 
    super.viewDidLoad() 


    let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate 
    managedObjectContext = appDelegate.managedObjectContext 
    //self.fetchEntries() 

      // makes the searchbar stay in the current screen and not spill into the next screen 
    definesPresentationContext = true 

    // Uncomment the following line to preserve selection between presentations 
    // self.clearsSelectionOnViewWillAppear = false 

    // Uncomment the following line to display an Edit button in the navigation bar for this view controller. 
    // self.navigationItem.rightBarButtonItem = self.editButtonItem() 
} 


    override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 

// MARK: - Table view data source 



override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int 
{ 

    return self.entries.count 


} 
override func numberOfSectionsInTableView(tableView: UITableView) -> Int 
{ 
    return 1 
} 

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell 
{ 
    let cell = tableView.dequeueReusableCellWithIdentifier("NotesCell", forIndexPath: indexPath) 

    // Configure the cell... 
       let entry1 = entries[indexPath.row] 
     cell.textLabel?.text = entry1.valueForKey("entry_title") as? String 


     let imageData2 = entry1.valueForKey("entry_image") as? NSData 

     if let imageData2 = imageData2 
     { 
      let myimage = UIImage(data:imageData2,scale:1.0) 
      cell.imageView?.image = myimage 
     } 


    return cell 

} 
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) 
{ 
    if segue.identifier! == "showNote" 
    { 
     let detailDisplay = segue.destinationViewController as! DetailDisplayViewController 
     let selectedIndexPath = tableView.indexPathForSelectedRow! 
     let entry = entries[selectedIndexPath.row] 
     detailDisplay.entry = entry 
    } 
} 
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) 
{ 
    let entry1 = self.entries[indexPath.row] 
    self.managedObjectContext.deleteObject(entry1) 
    self.entries.removeAtIndex(indexPath.row) 
    self.tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Automatic) 
    do 
    { 
     try managedObjectContext.save() 
    } catch { 
     print ("could not save the new entry ") 
    } 


} 
override func viewWillAppear(animated: Bool) 
{ 
    super.viewWillAppear(animated) 
    self.fetchEntries() 

} 

func fetchEntries() 
{ 
    let fetchRequest = NSFetchRequest(entityName:"Entry") 
    do { 
     let entryObjects = try managedObjectContext.executeFetchRequest(fetchRequest) 
     self.entries = entryObjects as! [NSManagedObject] 
    }catch let error as NSError 
    { 
     print ("could not save the new entry \(error.description) ") 
    } 
    tableView.reloadData() 
} 
} 

Answer 1

// Вы должны поддерживать два массива, попробовать, как это

func fetchEntries() 
{ 
let fetchRequest = NSFetchRequest(entityName:"Entry") 
do { 
    let entryObjects = try managedObjectContext.executeFetchRequest(fetchRequest) 
    self.entries = entryObjects as! [NSManagedObject] 
}catch let error as NSError 
{ 
    print ("could not save the new entry \(error.description) ") 
} 
self.arrOriginalList = self.entries 
tableView.reloadData() 
} 


- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar { 
[searchBar resignFirstResponder]; 
self.entries = [NSMutableArray arrayWithArray:self.arrOriginalList]; 
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"entry_title.lowercaseString BEGINSWITH[C] %@", [searchBar.text lowercaseString]]; 


self.entries= [NSMutableArray arrayWithArray:[self.entries filteredArrayUsingPredicate:predicate] 
       ]; 



if([searchBar.text isEqualToString:@""]){ 

    self.entries = [NSMutableArray arrayWithArray:self.arrOriginalList]; 

} 

[tableView reloadData]; 

} 

-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText { 
if([searchBar.text isEqualToString:@""]){ 

self.entries = [NSMutableArray arrayWithArray:self.arrOriginalList]; 
[tableView reloadData]; 

     } 



} 

Answer 2

// в быстрой попытке, как этот

func fetchEntries() 
{ 
let fetchRequest = NSFetchRequest(entityName:"Entry") 
do { 
let entryObjects = try managedObjectContext.executeFetchRequest(fetchRequest) 
self.entries = entryObjects as! [NSManagedObject] 
}catch let error as NSError 
{ 
    print ("could not save the new entry \(error.description) ") 
} 
self.arrOriginalList = self.entries 
tableView.reloadData() 
} 


func searchBarSearchButtonClicked(searchBar: UISearchBar) { 
    searchBar.resignFirstResponder() 
    self.entries = NSMutableArray(array:self.arrOriginalList) 
    let predicate: NSPredicate = NSPredicate(format:"entry_title.lowercaseString BEGINSWITH[C] %@", searchBar.text!.lowercaseString) 
    self.entries= NSMutableArray(array:self.entries.filteredArrayUsingPredicate(predicate)) 
    if searchBar.text == "" { 

     self.entries = NSMutableArray(array:self.arrOriginalList) 
    } 
    tableView.reloadData() 
} 

func searchBar(searchBar: UISearchBar, textDidChange searchText: String) { 
    if searchBar.text == "" { 
     self.entries = NSMutableArray(array:self.arrOriginalList) 
     tableView.reloadData() 

    } 
}