iOS Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'unable to

刚接触iOS，依照教程操作执行出现错误

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

解决的方法是加一句：

[self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:CellIdentifier];

加的位置是：

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

{ 

    static NSString *CellIdentifier = @"ListPrototypeCell"; 

    [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:CellIdentifier]; 

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



    // config cell

　XYZToDoItem * toDoItem = [self.toDoItem objectAtIndex:indexPath.row];

cell.textLabel.text = toDoItem.itemName;

return cell; 

}

因为刚学习IOS,原因不明