CODEWITHSUNDEEP
iosswifttableview
tolerate＿Me_Thx
tolerate＿Me_Thx

Reputation: 387

How to let UITableView scroll to the bottom in dynamic height cells?

I have a UITableView with many cells.
Each cells following it's contents have dynamic height.
But I notice that UITableView sometimes don't scroll the last indexPath when I enter this viewController.
Have any idea to fix it.

tableView.estimatedRowHeight = 200.0
tableView.rowHeight = UITableViewAutomaticDimension

let bottomOffSet = CGPoint(x: 0, y: self.tableView.contentSize.height - self.tableView.bounds.size.height)
self.tableView.setContentOffset(bottomOffSet, animated: false)

PS: I don't want to use "scrollToRow", because it would trigger tableview's function "cellForRowAtIndexPath" many times than "setContentOffset". 

tableView.scrollToRow(at: IndexPath(row: contents.count - 1, section: 0), at: .top, animated: animated)

Upvotes: 1

Views: 884

Answers (1)

PGDev
PGDev

Reputation: 24341

Try setting the tableView's contentOffset to the tableView's contentSize, i.e.

override func viewDidAppear(_ animated: Bool)
{
    super.viewDidAppear(animated)
    let bottomOffSet = CGPoint(x: 0, y: self.tableView.contentSize.height - self.tableView.bounds.size.height)
    self.tableView.setContentOffset(bottomOffSet, animated: false)
}

Set the contentOffset in viewDidAppear.

Also implement the following UITableViewDelegate methods:

override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat
{
    return UITableViewAutomaticDimension
}

override func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat
{
    return 126.0 //Maximum possible cell height
}

Upvotes: 0

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