Assertion failure in dequeueReusableCellWithIdentifier:forIndexPath:

Solution 1:

You're using the dequeueReusableCellWithIdentifier:forIndexPath: method. The documentation for that method says this:

Important: You must register a class or nib file using the registerNib:forCellReuseIdentifier: or registerClass:forCellReuseIdentifier: method before calling this method.

You didn't register a nib or a class for the reuse identifier "Cell".

Looking at your code, you seem to expect the dequeue method to return nil if it doesn't have a cell to give you. You need to use the dequeueReusableCellWithIdentifier: for that behavior:

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

Notice that dequeueReusableCellWithIdentifier: and dequeueReusableCellWithIdentifier:forIndexPath: are different methods. See doc for the former and the latter.

If you want to understand why you'd want to ever use dequeueReusableCellWithIdentifier:forIndexPath:, check out this Q&A.

Solution 2:

I think this error is about registering your nib or class for the identifier.

So that you may keep what you are doing in your tableView:cellForRowAtIndexPath function and just add code below into your viewDidLoad:

[self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"Cell"];

It's worked for me. Hope it may help.

Solution 3:

Although this question is fairly old, there is another possibility: If you are using Storyboards, you simply have to set the CellIdentifier in the Storyboard.

So if your CellIdentifier is "Cell", just set the "Identifier" property:

Make sure to clean your build after doing so. XCode sometimes has some issues with Storyboard updates

Solution 4:

i had the same problem replacing with

static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

   if (cell==nil) {
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];

    }

solved

Solution 5:

The problem is most likely because you config custom UITableViewCell in storyboard but you do not use storyboard to instantiate your UITableViewController which uses this UITableViewCell. For example, in MainStoryboard, you have a UITableViewController subclass called MyTableViewController and have a custom dynamic UITableViewCell called MyTableViewCell with identifier id "MyCell".

If you create your custom UITableViewController like this:

 MyTableViewController *myTableViewController = [[MyTableViewController alloc] init];

It will not automatically register your custom tableviewcell for you. You have to manually register it.

But if you use storyboard to instantiate MyTableViewController, like this:

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
MyTableViewController *myTableViewController = [storyboard  instantiateViewControllerWithIdentifier:@"MyTableViewController"];

Nice thing happens! UITableViewController will automatically register your custom tableview cell that you define in storyboard for you.

In your delegate method "cellForRowAtIndexPath", you can create you table view cell like this :

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

//Configure your cell here ...

return cell;
}

dequeueReusableCellWithIdentifier will automatically create new cell for you if there is not reusable cell available in the recycling queue.

Then you are done!