将按钮定位到动态TableView底部

Question

I have a dynamic TableView that changes size based on API content. That is working fine, but I can't get a button or any content below, outside of the TableView to position correctly and keep the space consistent. The button moves up and down depending on the number of rows in the TableView.

I have a Top Space to TableView constraint set, but it doesn't give me the same amount of space between the bottom of the TableView and the button if my data is longer.

Is there any way to anchor that to bottom of the TableView regardless of if the heading has 1 or 2 lines, etc?

Thanks for any help

Answer 1

1- set tableView height constraint to 3000 (any high number)

2- get bounds of the last cell and access it's y , height from bounds property

let currentHeight  =  y of last cell  + it's height 

3- set it to table

self.tableViewHeightConstraint.constant = currentHeight 

4- hook button's top to tableView's bottom + 20

Answer 2

This is how ended up doing it.

After successfully getting the data.

            // Get visible cells and sum up their heights
            let cells = self.notesTable.visibleCells
            var heightOfTableView = 0
            for cell in cells {
                heightOfTableView += Int(cell.frame.height)
            }
            //total tableview height after data loaded
            //so rows aren't cut off or blank
            self.tableViewHeightConstraint.constant = CGFloat(heightOfTableView)
            //distance from top of TableView to place button
            self.buttonFromTableTopConstraint.constant = CGFloat(heightOfTableView)