Crash when creating custom UITableViewCell

Question

I am trying to create a custom table view cell with a xib but when I call:

CustomReferenceTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];

I get the following:

Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<NSObject 0x7aa59c00> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key

Here is my setup:

- (void)viewWillAppear:(BOOL)animated   
{
    [self.tableView registerNib:[UINib nibWithNibName:@"CustomReferenceTableViewCell"
                                           bundle:[NSBundle mainBundle]]
     forCellReuseIdentifier:@"referenceCell"];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *cellIdentifier = @"referenceCell";

     CustomReferenceTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    if (cell == nil) {
         cell = [[CustomReferenceTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
    }

    cell.number.text = @"1";
    cell.referenceName.text = @"Name";
    cell.reference.text = @"The text of the reference";

    return cell;
 }

Here is a picture of my connections in interface builder. Also my cellIdentifiers match between class and xib:

I have seen this post here but I still can't seem to get it work.

Help would be greatly appreciated.

Edit

Here is a pic showing setting of custom class. Below that is my initialiser for the tableViewCell:

Here is the header:

#import <UIKit/UIKit.h>

@interface CustomReferenceTableViewCell : UITableViewCell

@property (nonatomic, weak) IBOutlet UILabel *number;
@property (nonatomic, weak) IBOutlet UILabel *referenceName;
@property (nonatomic, weak) IBOutlet UILabel *reference;

@end

And here is the implementation:

#import "CustomReferenceTableViewCell.h"

@implementation CustomReferenceTableViewCell

- (void)awakeFromNib {
    // Initialization code
}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
    [super setSelected:selected animated:animated];

    // Configure the view for the selected state
}

@end

Answer 1

I think you are setting the file owner of the cell to your custom cell which you shouldn't do. The way to get things working for a custom cell is,

1. In your xib, have a Table View Cell component an populate the contents of the cell in its ContentView.

2. Make your class CustomReferenceTableViewCell as the Custom Class of that cell component.

3. Now, do NOT register the cell in your tableview; instead do the following in the cellForRowAtIndexPath when your cell is nil after [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; and then register it:

   cell = [self.tableView dequeueReusableCellWithIdentifier:cellID];
   if(cell == nil) {
       [self.tableView registerNib:[UINib nibWithNibName:[@"CustomReferenceTableViewCell" ] bundle:nil] forCellReuseIdentifier:cellID];
       NSArray *nibContents;
       CustomReferenceTableViewCell *cell;
       nibContents = [[NSBundle mainBundle]
                      loadNibNamed:nibName owner:self options:NULL];
       NSEnumerator *nibEnumerator = [nibContents objectEnumerator];
       NSObject *nibItem = nil;
       while ((nibItem = [nibEnumerator nextObject]) != nil) {
           if ([nibItem isKindOfClass:[CustomReferenceTableViewCell class]]) {
               cell = (CustomReferenceTableViewCell *)nibItem;
           }
       }
   }
   

This method has been working out for me for the past 8 months. I have no reasons why it could cause a problem to you.

Answer 2

Try to set your static NSString *cellIdentifier = @"referenceCell"; above @interface And change registerNib place from WillAppear to viewDidLoad. Also you can change cell creating

CustomReferenceTableViewCell *cell = (CustomReferenceTableViewCell *)[tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (cell == nil) {
     cell = [[[NSBundle mainBundle]loadNibNamed:@"CustomReferenceTableViewCell" owner:self options:nil] lastObject];
}

Answer 3

Just follow my coding for your app

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
 {

    CustomCell *cell = (CustomCell *)[tableView dequeueReusableCellWithIdentifier:@"Reuse"];

    NSArray *nib=[[NSBundle mainBundle] loadNibNamed:@"CustomCell" owner:self options:nil];

    if(cell == nil)
    {
       cell = [nib objectAtIndex:0];
    }

    cell.number.text = @"1";

    cell.referenceName.text = @"Name";

    cell.reference.text = @"The text of the reference";

    return cell;

  }

Answer 4

Firstly CodingVoldermort's answer helped me get to sort out the issue. I was setting the File's Owner to my custom class which you shouldn't do. This should be left as NSObject.

The reason I thought it needed to be changed was because I couldn't hook up my IBOutlets by holding control and clicking on the tableview image under placeholders and dragging to the appropriate view in the xib.

Instead I needed to go under 'Show the connection inspector' pane and control + click and drag from there to get the connections to work. Then my original posted code would work.

Many thanks for all the responses guys.