Xcode unable to dequeue a cell with identifier

问题:

my work is about `UITableView. Each time I run my project, this error appears :

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'unable to dequeue a cell with identifier Cell1 - must register a nib or a class for the identifier or connect a prototype cell in a storyboard

I checked a hundred times my cell identifier in my storyboard and in my code are the same. Code (defaut code from UITableViewController) :

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
    static NSString *CellIdentifier = @"Cell1";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

    // Configure the cell...

    return cell;
}

Picture of Table View Cell properties :

I created and implemented a subclass of UITableViewCell for my cell.

Any idea why this is not working ?

Any way (line of code) to know what is the identifier of a cell ?

Thanks

Edit : Screenshot of my interface builder.

Edit 2 : Text of customCell.h

#import <UIKit/UIKit.h>

@interface customCell : UITableViewCell

@end

New error appears when I run the project :

[<choixActiviteViewController 0x7591ac0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key Cell1.

choixActiviteViewController is a subclass of UITableViewController and is the custom class of Choix Activite View Controller.

回答1:

Instead of:

 UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

Try:

 UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

if this does not work then, also add:

  if (cell == nil) {
    cell = [[customCell alloc] init];
}

回答2:

Ok, your problem is that you're using Static cells, instead of Prototype cells. Just change your UITableView Content type.

回答3:

Ok, my project finally works. Some errors appeared about things I've deleted and I can't find anymore.

I've just deleted every TableViewCell I had to create a new unique UITableViewCell with the following properties :

class : customCell

Style : Basic (but it works also with Custom)

Identifier : Cell1

Thanks for your help ssantos, Abdullah Shafique and bilobatum.

回答4:

If your table cell is a subclass of UITableViewCell, then you're not using the "Basic" style of cell. Change the style setting in the attributes inspector to Custom.

Also, make sure the Class in the table cell's Identity inspector is set to your custom table cell subclass.

回答5:

I suppose you'r using static cells. If you'r doing that consciously - just delete thous methods from your .m file:

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
}

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

回答6:

try to use customCell class instead UITableViewCell class.

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell1";
customCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

// Configure the cell...

return cell;
}

回答7:

If you are intentionally using Static UITableViewCells, then you don't have to implement the normal UITableView population methods (numberOfSectionsInTableView:, tableView:numberOfRowsInSection:, tableView:cellForRowAtIndexPath:).
The UITableView will automatically populate from the cells defined in your storyboard. You do end up using the tableView:cellForRowAtIndexPath: in order to format the data in the cells. You use [super tableView:cellForRowAtIndexPath:] to get the tableViewCell and then ReuseIdentifier, tags, or indexPath to match the cell to the data that goes with it.

回答8:

The reason for this issue is very clear from the exception:

One Solution to this problem is register a class for the identifier

In Swift this can be done as follows

tableView.registerClass(UITableViewCell.classForKeyedArchiver(), forCellReuseIdentifier: "your_reuse_identifier")

回答9:

In my case the Storyboard where I had defined the missing UITableViewCell was localised.

回答10:

Comment out all of the code in application:didFinishLaunchingWithOptions(AppDelegate) but remain return YES, and try it again.

回答11:

I was facing this issue when presenting the UITableViewController having a custom cell from another viewcontroller. As a workaround I instantiated it from the storyboard and that solved the issue.

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let controller = storyboard.instantiateViewController(withIdentifier: "YourTableViewController")
self.present(controller, animated: true, completion: nil)