My frame height is not updating after changes made

Question

I have a UITableView inside of a UIView that I perform the function insertRowsAtIndexPaths on. More content appears, but the UITableView height remains the same. I've read through hundreds of SO posts for days now, and can't seem to understand why this isn't updating.

var tableView       = UITableView()
tableView.frame      = CGRectMake(0, 0, self.view.frame.width, view.frame.height)
tableView.estimatedRowHeight = 40
tableView.scrollEnabled = true
tableView.userInteractionEnabled  = true
tableView.rowHeight = UITableViewAutomaticDimension
tableView.delegate   = self
tableView.dataSource = self

Then I if I click a cell..

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    let (parent, isParentCell, actualPosition) = self.findParent(indexPath.row)

    self.tableView.beginUpdates()
    self.updateCells(parent, index: indexPath.row)
    self.tableView.endUpdates()

    var frame : CGRect = self.tableView.frame
    print(frame.size) // Returns -> (375.0, 667.0)
    frame.size = self.tableView.contentSize
    print(frame.size) // Return -> (375.0, 1151.0)
    self.tableView.frame = frame

}

But the height of the UITableView remains 667.0 as seen here :

.. even though you can clearly see the contentSize now transcends the bounds.

What could I possibly be missing here?

---

Update

-- Here is how I draw cellForRowAtIndexPath ..

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    var cell : UITableViewCell!

    let (parent, isParentCell, actualPosition) = self.findParent(indexPath.row)

    if !isParentCell {
        cell = tableView.dequeueReusableCellWithIdentifier(childCellIdentifier, forIndexPath: indexPath)
        cell.textLabel!.text        = self.dataSource[parent].childs[indexPath.row - actualPosition - 1]
        cell.textLabel!.textColor   = UIColor(red: 35/255.0, green: 31/255.0, blue: 32/255.0, alpha: 1.0)
        cell.textLabel!.font        = UIFont(name: "STHeitiTC-Light", size: 16)
        cell.textLabel!.layer.borderColor = UIColor.purpleColor().CGColor
        cell.textLabel!.layer.borderWidth = 1.0
    }
    else {
        cell = tableView.dequeueReusableCellWithIdentifier(parentCellIdentifier, forIndexPath: indexPath)
        cell.textLabel!.text        = self.dataSource[parent].title
        cell.textLabel!.textColor   = UIColor(red: 66/255.0, green: 116/255.0, blue: 185/255.0, alpha: 1.0)
        cell.textLabel!.font        = UIFont(name: "STHeitiTC-Light", size: 20)
    }
    cell.textLabel!.frame = CGRectMake(0,0,self.view.frame.width, CGFloat.max)
    cell.selectionStyle                                       = .None
    cell.textLabel!.translatesAutoresizingMaskIntoConstraints = false
    cell.textLabel!.numberOfLines                             = 0
    cell.textLabel!.sizeToFit()
    cell.textLabel!


    return cell
}

A visual of the problem..

Answer 1

The frame of the table view is the actual size that it takes in its superview. The content size of the tableview is the size of its content. Since the tableview is scrollable this two values are not related. The frame size is the size of the window through which you see the content of the tableview. The content can be outside of that window and then you cannot see it but you can scroll to see the content you want.

Answer 2

When you add new rows to the tableview the contentSize will increase, the frame of tableview will be same as tableview will scroll after content size increases

For programatically it will be like

tableView.userInteractionEnabled  = true
tableView.scrollEnabled = true

Else you can check the constraint if you have applied auto layout - it should be like marigin from top,bottom,left,right or you can specifiy height/width also instead of bottom/right margin

---

Update: : Auto Layout Looks like Autolayout is the issue for UITableViewAutomaticDimension, according to apple doc, one tutorial and one answer in the SO this AutomaticDimension only work when you have auto layout enabled, so because of that it may not calculating the correct height

Apple Doc:Self sizing

tableView.estimatedRowHeight = 85.0
tableView.rowHeight = UITableViewAutomaticDimension

As soon as both of these properties are set, the system uses Auto Layout to calculate the row’s actual height.

For the demo of Self sizing with the Auto layout you can check the following link :

Self sizing cell demo:Appcoda

From Appcoda

However, without auto layout, self sizing cells won’t work as it relies on the constraints to determine the proper row height.

Auto layout can be done both from Interface Builder and Programatically: Interface Build is shown in the appcoda demo for the basic of programatically AutoLayout
Apple Doc: Programatically Auto Layout
Auto Layout tutorial