UITableViewCell宽度大于UITableView宽度

Question

I encountered a weird problem. I am creating a custom selected view for my tableviews. However, this selection view doesn't fit well. I found out that this is because my selection view is 300px while the cell itself is 320px. The weird part is that the UITableView 's width is actually just 300px only. How will I adjust the cell width of my table?

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

   UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:tableIdentifier];

  if (cell == nil)
    cell = [[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:tableIdentifier] autorelease];


  if (tableView == bandTable)
  {
    UIImageView *imageBg = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"column1_selected.png"]];
    [imageBg setAutoresizingMask:UIViewAutoresizingFlexibleWidth];

    [tableView setSeparatorStyle:UITableViewCellSeparatorStyleNone];
    [cell setSelectionStyle:UITableViewCellSelectionStyleGray];
    [cell setSelectedBackgroundView:imageBg];
    [imageBg release];

    NSArray *array = [bandDictionary objectForKey:@"Bands"];

    cell.textLabel.text = [array objectAtIndex:indexPath.row];
    NSLog(@"CELL: %f", cell.bounds.size.width);
  }
  return cell;
}

Answer 1

Just set

cell.frame = CGRectMake(0,
                        0,
                        self.tableView.frame.size.width,
                        cell.frame.size.height);

in cellForRowAtIndexPath .

Answer 2

Add this two lines after your cell gets created,

[[cell contentView] setFrame:[cell bounds]];
[[cell contentView] setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];

Answer 3

@IvorPrebeg, you shouldn't set the frame for the UITableViewCell inside cellForRowAtIndexPath . The UITableViewCell will automatically be set to the width of the UITableView after the cell did execute layoutSubviews . This will be done automatically after setting a value on the label you inserted in the cell .

Its just important to calculate inside heightForRowAtIndexPath a size based on the font and the text inserted into the cell which is equal to the one inside your cell. In my case it looks like this:

- (CGFloat)tableView:(UITableView *)tableView 
           heightForRowAtIndexPath:(NSIndexPath *)indexPath{+
    ChatMessage *message = 
     [self.fetchedResultsController objectAtIndexPath:indexPath];

    CGSize size = [message.text sizeWithFont:self.messageCell.labelMessage.font
                       constrainedToSize:CGSizeMake(self.tableView.frame.size.width * 0.8f, HUGE_VAL)
                           lineBreakMode:NSLineBreakByWordWrapping];

    return size.height;
}

And than inside the UITableViewCell :

- (void)layoutSubviews{
    [super layoutSubviews];

    if( _fInitWidth == 0 ){
        self.labelMessage.preferredMaxLayoutWidth = 
           self.bounds.size.width * 0.8f;
    }    
    [self.contentView setNeedsDisplay];
}

Like you can see, the prefferedMaxLayoutWidth of the UILabel inside my UITableViewCell will be 0.8 of the cells width (320 * 0.8). LayoutSubviews will be excecuted inside cellForRowAtIndex after setting up the cells properties. After that, UITableView will call the heightForRowAtIndexPath and calculate the size for the height. Therefore I calculate the UILabels size by passing a width * 0.8 for constrainedToSize ( tableview width is 320.0 * 0.8 ) the same as in the cell .

The example values are for iPhone devices, they will change on bigger screens of course.

Answer 4

On C#:

public UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath){

  UITableViewCell cell = new UITableViewCell();
  cell.Frame = new CoreGraphics.CGRect(0, 0,this.selectSchoolTableview.Frame.Width, cell.Frame.Size.Height);
  cell.ContentView.AutosizesSubviews = true;
  return cell;
}

Another trick:

public UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath){

UITableViewCell cell = new UITableViewCell();
cell.Accessory = UITableViewCellAccessory.None;
cell.ContentView.AutoresizingMask = UIViewAutoresizing.FlexibleWidth;
cell.ContentView.AutoresizingMask = UIViewAutoresizing.FlexibleHeight;
return cell;

 }