Set TableView height by the number or rows

Question

I have got TableView in the MainstoryBoard and the number of rows is random every time. I want the height of the whole TableView to be fl

Answer 1

Take outlet of the Height Constraint of the parent view and assign it the height of table view's content + constant(extra height of other contents in the view)

heightConstraintView.constant = tableView.contentSize.height + constantValue //use the value of constant as required.

and write this code in the cellForRowAt method.

Answer 2

You can change the UITableView height as per the contentSize as below:

Swift 2.2

tableView.frame = CGRectMake(tableView.frame.origin.x, tableView.frame.origin.y, tableView.frame.size.width, tableView.contentSize.height)

Swift 3 or 4+

tableView.frame = CGRect(x: tableView.frame.origin.x, y: tableView.frame.origin.y, width: tableView.frame.size.width, height: tableView.contentSize.height)

and make sure you write the above line in viewDidAppear method

You need to write the above line in viewDidLayoutSubviews also.

Swift 2.2

func viewDidLayoutSubviews(){
     tableView.frame = CGRectMake(tableView.frame.origin.x, tableView.frame.origin.y, tableView.frame.size.width, tableView.contentSize.height)
     tableView.reloadData()
}

Swift 3 or 4+

func viewDidLayoutSubviews(){
     tableView.frame = CGRect(x: tableView.frame.origin.x, y: tableView.frame.origin.y, width: tableView.frame.size.width, height: tableView.contentSize.height)
     tableView.reloadData()
}

Answer 3

DispatchQueue.main.async {
    var frame = tableView.frame
    frame.size.height = tableView.contentSize.height
    tableView.frame = frame
}

OR

DispatchQueue.main.async {
    self.TblViewHeightConstraint.constant = CGFloat((self.array.count) * 30)//Here 30 is my cell height
    self.TblView.reloadData()
}