ios - UITableView content size while using auto-layout

Question

I want to calculate Content size of my UITableView. I am using autolayout with height UITableViewAutomaticDimension.

Tried to get [UITableView contentsize] after reloading tableview, in that case height get calculated based on estimatedRowHeight.

self.tableView.estimatedRowHeight = 50;
self.tableView.rowHeight = UITableViewAutomaticDimension;

Delegate -

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
? ? return UITableViewAutomaticDimension;
}

Trying to get content size and assign it to height constrain.

[self.tableView reloadData];
[self.tableView layoutIfNeeded];
self.tableHeightConstraint.constant = self.tableView.contentSize.height;

Any suggestions? Thanks in advance.

Edit:

Finally I am solved my problem with some tweak. I changed tableview height to max (In my case 300 is max) before reloading data on table, so tableview has space to resize all cells.

self.tableHeightConstraint.constant = 300;
[self.tableView reloadData];
[self.tableView layoutIfNeeded];
self.tableHeightConstraint.constant = self.tableView.contentSize.height;

Thanks for help.

question from:https://stackoverflow.com/questions/36002741/uitableview-content-size-while-using-auto-layout

Answer 1

Finally I am solved my problem with some tweak. I changed tableview height to max (Objective-C: CGFLOAT_MAX, Swift: CGFloat.greatestFiniteMagnitude) before reloading data on table, so tableview has space to resize all cells.

Objective-C:

self.tableHeightConstraint.constant = CGFLOAT_MAX;
[self.tableView reloadData];
[self.tableView layoutIfNeeded];
self.tableHeightConstraint.constant = self.tableView.contentSize.height;

Swift:

tableHeightConstraint.constant = CGFloat.greatestFiniteMagnitude
tableView.reloadData()
tableView.layoutIfNeeded()
tableHeightConstraint.constant = contentTableView.contentSize.height

Posting this so it will be helpful for others.