Assertion failure in -[UITableView _configureCellForDisplay:forIndexPath:]今天做一个tableView遇到一个这么个问题。经过baidu google，终于找到正解。因为- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath     *)indexPath这个函数的返回值是个null！！查stackoverflow 找到下面的解。CellIdentifier I bet your cellForRowAtIndexPath is returning null.- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath     *)indexPath{    static NSString *CellIdentifier = @"Photos";    /** NOTE: This method can return nil so you need to account for that in code */    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];    // NOTE: Add some code like this to create a new cell if there are none to reuse    if(cell == nil)    {        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];    }    NSString *string = [[self.photosInPlace objectAtIndex:indexPath.row]     valueForKeyPath:@"description._content"];    cell.textLabel.text = string;    return cell;}That's probably why [UITableView _configureCellForDisplay:forIndexPath:] is failing... becausecellForRowAtIndexPath is returning a null value and then configureCellForDisplay is expecting aUITableViewCell.

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