how to hide empty rows in a UITableView and change the height of the Uitableview based on non-empty rows

I have couple of problems with my UITableView.

1. When I add a UITableview on my page, by default it brings up some fixed number of rows, even though I set number of rows in section as 1. All the rows appear except the first row, and all are empty rows. So, I want to hide all the empty rows in the UItableview.

2. Based on the non-empty rows, I want to change the height of my UItableView.

NEW ANSWER

In Swift 2.2, 3.0 and onwards, do the following:

OLD ANSWER BELOW. KEPT FOR POSTERITY.

If you must use UITableViewStylePlain, and you don't use a footerView for anything else, you can use the following semi-dirty solution if you have ARC enabled.:

- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
    UIView *view = [[UIView alloc] init];

    return view;
}

If you have ARC disabled, use the following:

- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
    UIView *view = [[[UIView alloc] init] autorelease];

    return view;
}

This creates an invisible footerView, that appears immediately after the last data-filled cell.

You sure you are using UITableViewStyleGrouped style?

Because by default it is set to UITableViewStylePlain which shows empty cells too after displaying filled cells.

- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section 
 { 
     return 0.01f;
 }

and for iOS 7

 self.tableView.tableFooterView = [[UIView alloc] initWithFrame:CGRectZero];

I solved the problem by creating a simple UIView as footer view with the same background color as the table background:

(UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section {
    UIView *view = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 100)] autorelease];
    view.backgroundColor = [UIColor whiteColor];
    return view;
}

Maybe you have to disable scrolling in your table view in addition.

If your tableview has multiple sections, you may try using this:

- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
    if (section == tableView.numberOfSections - 1) {
        return [UIView new];
    }
    return nil;
}

- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section
{
    if (section == tableView.numberOfSections - 1) {
        return 1;
    }
    return 0;
}

- (void) viewDidLoad
{
  [super viewDidLoad];
  self.tableView.tableFooterView = [[[UIView alloc] init] autorelease];
}

This can also be done through Interface Builder. Simply add a 1 pixel tall UIView as a footer to the UITableView. It's essentially the same as most of the answers here, but it keeps some UI specifics in the view instead of in the view controller.

[self.SomeTableView setSeparatorStyle:UITableViewCellSeparatorStyleNone];

Use this to get rid of the lines if the UITableView is empty.

in the method that returns the number of rows, specify the count yourself dynamically. For example if you are going to populate the table with say a NSArray named arrayForRows:

return [arrayForRows count]; // inside the method which returns the number of rows.

The above is a simple example populating a table with an array as a datasource. There are no empty rows. Only that many rows show up in the table according to the count of items in the array populating the table.

I think you mean height of the row in the table. You can play around with the height of the rows by using the method:

(CGFloat)tableView:(UITableView  *)tableView heightForRowAtIndexPath:(NSIndexPath  *)indexPath

read http://developer.apple.com/library/ios/#documentation/uikit/reference/UITableViewDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/UITableViewDelegate/tableView:heightForRowAtIndexPath:

EDIT: ah now I get what you are trying to achieve. You are trying to avoid showing the empty rows separated with those separator lines right? See this post:

https://stackoverflow.com/questions/1491033/how-to-display-a-table-with-zero-rows-in-uitableview

A bit hidden in Bourne's answer; if you want to hide to bottom empty rows in a plain tableview with multiple sections, use this answer:

https://stackoverflow.com/a/5658100/580173

For Swift:

override func viewWillAppear(animated: Bool) {
    self.tableView.tableFooterView = UIView(frame: CGRect.zeroRect)

// OR 

    self.tableView.tableFooterView = UIView()
}

For C#: (Please don't forget to add using CoreGraphics; )

public override void ViewWillAppear(bool animated)
{
    base.ViewWillAppear(animated);
    this.sampleTableview.TableFooterView = new UIView(frame: CGRect.Empty);
}