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IOS error unrecognized selector sent to instance 0x6ea9090

I used basic data to configure all my objects. But when I try to create a new client object and send it to the addCustomer view module controller, I keep getting this error.

* Application termination due to an uncaught exception 'NSInvalidArgumentException', reason: '- [UINavigationController setCustomer:]: unrecognized selector sent to instance 0x8854700'

The error occurs in AccountListTableViewController.m when the program receives addController.customer = newCustomer in the prepareForSegue file.

Here is the code:

AccountListTableViewController.h

#import <UIKit/UIKit.h> #import "CustomerAddViewController.h" @class Customer; @interface AccountListTableViewController : UITableViewController <CustomerAddDelegate, NSFetchedResultsControllerDelegate> { @private NSFetchedResultsController *fetchedResultsController; NSManagedObjectContext *managedObjectContext; } @property (nonatomic, retain) NSFetchedResultsController *fetchedResultsController; @property (nonatomic, retain) NSManagedObjectContext *managedObjectContext; @end

AccountListTableViewController.m

 #import "AccountListTableViewController.h" #import "AccountListCell.h" #import "Customer.h" #import "AppDelegate.h" @implementation AccountListTableViewController @synthesize managedObjectContext, fetchedResultsController; - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{ if ([[segue identifier] isEqualToString:@"AddAccountSegue"] ) { CustomerAddViewController *addController = [segue destinationViewController]; addController.delegate = self; Customer *newCustomer = [NSEntityDescription insertNewObjectForEntityForName:@"Customer" inManagedObjectContext:self.managedObjectContext]; addController.customer = newCustomer; } } -(void)customerAddViewController:(CustomerAddViewController *)customerAddViewController didAddCustomer:(Customer *)customer{ [self dismissModalViewControllerAnimated:YES]; } - (id)initWithStyle:(UITableViewStyle)style { self = [super initWithStyle:style]; if (self) { // Custom initialization } return self; } - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } #pragma mark - View lifecycle - (void)viewDidLoad { //I added this to keep from crashing if (managedObjectContext == nil) { managedObjectContext = [(AppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext]; NSLog(@"After managedObjectContext: %@", managedObjectContext); } [super viewDidLoad]; // Uncomment the following line to preserve selection between presentations. // self.clearsSelectionOnViewWillAppear = NO; // Uncomment the following line to display an Edit button in the navigation bar for this view controller. // self.navigationItem.rightBarButtonItem = self.editButtonItem; } - (void)viewDidUnload { [super viewDidUnload]; // Release any retained subviews of the main view. // eg self.myOutlet = nil; } - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; } - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; } - (void)viewWillDisappear:(BOOL)animated { [super viewWillDisappear:animated]; } - (void)viewDidDisappear:(BOOL)animated { [super viewDidDisappear:animated]; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation == UIInterfaceOrientationPortrait); } #pragma mark - Table view data source - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { //#warning Potentially incomplete method implementation. // Return the number of sections. return 1; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { //#warning Incomplete method implementation. // Return the number of rows in the section. id <NSFetchedResultsSectionInfo> sectionInfo = [[self.fetchedResultsController sections] objectAtIndex:section]; return [sectionInfo numberOfObjects]; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { //Customer *customer = [self.fetchedResultsController objectAtIndexPath:indexPath]; AccountListCell *cell = [tableView dequeueReusableCellWithIdentifier:@"AccountCellReuseIdentifier"]; Customer *aCustomer = (Customer *)[fetchedResultsController objectAtIndexPath:indexPath]; cell.customer = aCustomer; // static NSString *CellIdentifier = @"Cell"; // // UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; // if (cell == nil) { // cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; // } // Configure the cell... return cell; } /* // Override to support conditional editing of the table view. - (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath { // Return NO if you do not want the specified item to be editable. return YES; } */ /* // Override to support editing the table view. - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { if (editingStyle == UITableViewCellEditingStyleDelete) { // Delete the row from the data source [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; } else if (editingStyle == UITableViewCellEditingStyleInsert) { // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view } } */ /* // Override to support rearranging the table view. - (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath { } */ /* // Override to support conditional rearranging of the table view. - (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath { // Return NO if you do not want the item to be re-orderable. return YES; } */ #pragma mark - Table view delegate - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { // Navigation logic may go here. Create and push another view controller. /* <#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:@"<#Nib name#>" bundle:nil]; // ... // Pass the selected object to the new view controller. [self.navigationController pushViewController:detailViewController animated:YES]; */ } - (NSFetchedResultsController *)fetchedResultsController { // Set up the fetched results controller if needed. if (fetchedResultsController == nil) { // Create the fetch request for the entity. NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; // Edit the entity name as appropriate. NSEntityDescription *entity = [NSEntityDescription entityForName:@"Customer" inManagedObjectContext:managedObjectContext]; [fetchRequest setEntity:entity]; // Edit the sort key as appropriate. NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"lastName" ascending:YES]; NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil]; [fetchRequest setSortDescriptors:sortDescriptors]; // Edit the section name key path and cache name if appropriate. // nil for section name key path means "no sections". NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:managedObjectContext sectionNameKeyPath:nil cacheName:@"Root"]; aFetchedResultsController.delegate = self; self.fetchedResultsController = aFetchedResultsController; // [aFetchedResultsController release]; // [fetchRequest release]; // [sortDescriptor release]; // [sortDescriptors release]; } return fetchedResultsController; } /** Delegate methods of NSFetchedResultsController to respond to additions, removals and so on. */ - (void)controllerWillChangeContent:(NSFetchedResultsController *)controller { // The fetch controller is about to start sending change notifications, so prepare the table view for updates. [self.tableView beginUpdates]; } - (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type newIndexPath:(NSIndexPath *)newIndexPath { UITableView *tableView = self.tableView; switch(type) { case NSFetchedResultsChangeInsert: [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade]; break; case NSFetchedResultsChangeDelete: [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; break; // case NSFetchedResultsChangeUpdate: // [self configureCell:(AccountListCell *)[tableView cellForRowAtIndexPath:indexPath] atIndexPath:indexPath]; // break; case NSFetchedResultsChangeMove: [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; [tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade]; break; } } - (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type { switch(type) { case NSFetchedResultsChangeInsert: [self.tableView insertSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade]; break; case NSFetchedResultsChangeDelete: [self.tableView deleteSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade]; break; } } - (void)controllerDidChangeContent:(NSFetchedResultsController *)controller { // The fetch controller has sent all current change notifications, so tell the table view to process all updates. [self.tableView endUpdates]; } @end

CustomerAddViewController.h

 #import <UIKit/UIKit.h> #import "Customer.h" @class Customer; @protocol CustomerAddDelegate; @interface CustomerAddViewController : UITableViewController{ Customer *customer; UITextField *firstName; UITextField *lastName; UITextField *address; UITextField *city; UITextField *state; UITextField *zip; UITextField *homePhone; UITextField *cellPhone; UITextField *email; id <CustomerAddDelegate> delegate; } @property (nonatomic, strong) Customer *customer; @property (nonatomic, strong) IBOutlet UITextField *firstName; @property (nonatomic, strong) IBOutlet UITextField *lastName; @property (nonatomic, strong) IBOutlet UITextField *address; @property (nonatomic, strong) IBOutlet UITextField *city; @property (nonatomic, strong) IBOutlet UITextField *state; @property (nonatomic, strong) IBOutlet UITextField *zip; @property (nonatomic, strong) IBOutlet UITextField *homePhone; @property (nonatomic, strong) IBOutlet UITextField *cellPhone; @property (nonatomic, strong) IBOutlet UITextField *email; @property (nonatomic, strong) id <CustomerAddDelegate> delegate; - (IBAction) saveCustomer; - (IBAction) cancel; @end @protocol CustomerAddDelegate <NSObject> -(void)customerAddViewController:(CustomerAddViewController *)customerAddViewController didAddCustomer:(Customer *)customer; @end

CustomerAddView.m

 #define NAME 0 #define ADDRESS 1 #define CONTACT 2 #import "CustomerAddViewController.h" #import "Customer.h" @implementation CustomerAddViewController @synthesize firstName, lastName, address, city, state, zip, homePhone, cellPhone, email, customer, delegate; //- (id)initWithStyle:(UITableViewStyle)style //{ // self = [super initWithStyle:style]; // if (self) { // // Custom initialization // } // return self; //} - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } #pragma mark - View lifecycle - (void)viewDidLoad { // [super viewDidLoad]; // Uncomment the following line to preserve selection between presentations. // self.clearsSelectionOnViewWillAppear = NO; // Uncomment the following line to display an Edit button in the navigation bar for this view controller. // self.navigationItem.rightBarButtonItem = self.editButtonItem; } - (void)viewDidUnload { [super viewDidUnload]; // Release any retained subviews of the main view. // eg self.myOutlet = nil; } - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; } - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; } - (void)viewWillDisappear:(BOOL)animated { [super viewWillDisappear:animated]; } - (void)viewDidDisappear:(BOOL)animated { [super viewDidDisappear:animated]; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation == UIInterfaceOrientationPortrait); } #pragma mark - Table view data source //This stuff not needed because we are setting static sections and rows in storyboard //- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView //{ // return 3; //} // //- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section //{ // NSInteger rows = 0; // switch (section) { // case NAME: // rows = 2; // break; // case ADDRESS: // rows = 4; // break; // case CONTACT: // rows = 3; // break; // } // // return rows; //} //- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath //{ // static NSString *CellIdentifier = @"Cell"; // // UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; // if (cell == nil) { // cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; // } // // // Configure the cell... // // return cell; //} /* // Override to support conditional editing of the table view. - (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath { // Return NO if you do not want the specified item to be editable. return YES; } */ /* // Override to support editing the table view. - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { if (editingStyle == UITableViewCellEditingStyleDelete) { // Delete the row from the data source [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; } else if (editingStyle == UITableViewCellEditingStyleInsert) { // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view } } */ /* // Override to support rearranging the table view. - (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath { } */ /* // Override to support conditional rearranging of the table view. - (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath { // Return NO if you do not want the item to be re-orderable. return YES; } */ #pragma mark - Table view delegate - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { // Navigation logic may go here. Create and push another view controller. /* <#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:@"<#Nib name#>" bundle:nil]; // ... // Pass the selected object to the new view controller. [self.navigationController pushViewController:detailViewController animated:YES]; */ } @end
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2 answers
 CustomerAddViewController *addController = [segue destinationViewController];

Are you sure your destination controller is a CustomerAddViewController ?

It looks like this is actually a navigation controller. Therefore, [UINavigationController setCustomer:]: unrecognized selector sent to instance 0x8854700 when you do addController.customer = newCustomer

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Continuing the first answer, the correct way to access the destination view controller when the navigation controller is in between is as follows:

 - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { if ([segue.identifier isEqualToString:@"AddAccountSegue"]) { UINavigationController *navigationController = segue.destinationViewController; CustomerAddViewController *addController = (id)[[navigationController viewControllers] objectAtIndex:0]; [addController setCustomer:yourObject]; } }
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Source: https://habr.com/ru/post/1380294/

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