Property not found in cellForRowAtIndexPath: method - objective-c

Question

I am getting an error which I don't understand because I have declared the property/ies. Have commented out the error in the AllListViewController.m file in the cellForRowAtIndexPath: method.
Here are the files:
Checklist.h
#import <Foundation/Foundation.h>
#interface Checklist : NSObject <NSCoding>
#property (nonatomic, copy) NSString *name;
#property (nonatomic, strong) NSMutableArray *items;
#property (nonatomic, copy) NSString *iconName;
-(int)countUncheckedItems;
#end
Checklist.m
#import "Checklist.h"
#import "ChecklistItem.h"
#implementation Checklist
-(id)initWithCoder:(NSCoder *)aDecoder
{
if ((self = [super init])) {
self.name = [aDecoder decodeObjectForKey:#"Name"];
self.items = [aDecoder decodeObjectForKey:#"Items"];
self.iconName = [aDecoder decodeObjectForKey:#"IconName"];
}
return self;
}
-(void)encodeWithCoder:(NSCoder *)aCoder
{
[aCoder encodeObject:self.name forKey:#"Name"];
[aCoder encodeObject:self.items forKey:#"Items"];
[aCoder encodeObject:self.iconName forKey:#"IconName"];
}
-(id)init
{
if ((self = [super init])) {
self.items = [[NSMutableArray alloc] initWithCapacity:20];
self.iconName = #"Appointments";
}
return self;
}
-(int)countUncheckedItems
{
int count = 0;
for (ChecklistItem *item in self.items) {
if (!item.checked) {
count += 1;
}
}
return count;
}
-(NSComparisonResult)compare:(Checklist *)otherChecklist
{
return [self.name localizedStandardCompare:otherChecklist.name];
}
#end
AllListsViewController.h
#import <UIKit/UIKit.h>
#import "ListDetailViewController.h"
#class DataModel;
#interface AllListsViewController : UITableViewController <ListDetailViewControllerDelegate, UINavigationControllerDelegate>
#property (nonatomic, strong) DataModel *dataModel;
#end
AllListsViewController.m
#import "AllListsViewController.h"
#import "Checklist.h"
#import "ChecklistViewController.h"
#import "ChecklistItem.h"
#import "DataModel.h"
#interface AllListsViewController ()
#end
#implementation AllListsViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (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)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[self.dataModel setIndexOfSelectedChecklist:indexPath.row];
Checklist *checklist = self.dataModel.lists[indexPath.row];
[self performSegueWithIdentifier:#"ShowChecklist" sender:checklist];
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:#"ShowChecklist"]) {
ChecklistViewController *controller = segue.destinationViewController;
controller.checklist = sender;
}
else if ([segue.identifier isEqualToString:#"AddChecklist"]) {
UINavigationController *navigationController = segue.destinationViewController;
ListDetailViewController *controller = (ListDetailViewController *)navigationController.topViewController;
controller.delegate = self;
controller.checklistToEdit = nil;
}
}
-(void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath
{
UINavigationController *navigationController = [self.storyboard instantiateViewControllerWithIdentifier:#"ListNavigationController"];
ListDetailViewController *controller = (ListDetailViewController *)navigationController.topViewController;
controller.delegate = self;
Checklist *checklist = self.dataModel.lists[indexPath.row];
controller.checklistToEdit = checklist;
[self presentViewController:navigationController animated:YES completion:nil];
}
#pragma mark - Table view data source
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [self.dataModel.lists count];
}
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
[self.dataModel.lists removeObjectAtIndex:indexPath.row];
NSArray *indexPaths = #[indexPath];
[tableView deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationAutomatic];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:CellIdentifier];
cell.imageView.image = [UIImage imageNamed:Checklist.iconName]; /* Use of undeclared identifier; did you mean 'Checklist'? or Property 'iconName' not found on object of type 'Checklist'*/
return cell;
}
Checklist *checklist = self.dataModel.lists[indexPath.row];
cell.textLabel.text = checklist.name;
cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;
cell.detailTextLabel.text = [NSString stringWithFormat:#"%d Remaining", [checklist countUncheckedItems]];
int count = [checklist countUncheckedItems];
if ([checklist.items count] == 0) {
cell.detailTextLabel.text = #"(No Items)";
} else if (count == 0) {
cell.detailTextLabel.text = #"All Done";
} else {
cell.detailTextLabel.text = [NSString stringWithFormat:#"%d Remaining", count];
}
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:#[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 - Navigation
// In a story board-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
-(void)listDetailViewControllerDidCancel:(ListDetailViewController *)controller
{
[self dismissViewControllerAnimated:YES completion:nil];
}
-(void)listDetailViewController:(ListDetailViewController *)controller didFinishAddingChecklist:(Checklist *)checklist
{
[self.dataModel.lists addObject:checklist];
[self.dataModel sortChecklists];
[self.tableView reloadData];
[self dismissViewControllerAnimated:YES completion:nil];
}
-(void)listDetailViewController:(ListDetailViewController *)controller didFinishEditingChecklist:(Checklist *)checklist
{
[self.dataModel sortChecklists];
[self.tableView reloadData];
[self dismissViewControllerAnimated:YES completion:nil];
}
-(void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
if(viewController == self) {
[self.dataModel setIndexOfSelectedChecklist:-1];
}
}
-(void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.tableView reloadData];
}
-(void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
self.navigationController.delegate = self;
NSInteger index = [self.dataModel indexOfSelectedChecklist];
if(index >= 0 && index < [self.dataModel.lists count]) {
Checklist *checklist = self.dataModel.lists[index];
[self performSegueWithIdentifier:#"ShowChecklist" sender:checklist];
}
}
#end

Answer 1

You have not declared the variable "Checklist" & trying to access the "iconName". Actually you are trying to access it directly via class name.
I can see you have created an instance if "Checklist" few lines down. So better create that instance before using Checklist.iconName
May be in the beginning of function after CellIdentifier creation.
Checklist *checklist = self.dataModel.lists[indexPath.row];
cell.imageView.image = [UIImage imageNamed:checklist.iconName]; /* Use of undeclared identifier; did you mean 'Checklist'? or Property 'iconName' not found on object of type 'Checklist'*/
return cell;
}
As per your code, "Checklist" is your class name, whereas the instance starts with small "c" as "checklist". So you also might have got confused.
Hope that helps.