Dynamic Height Issue for UITableView Cells (Swift)

Question

Dynamic text of variable length are being injected into tableview cell labels. In order for the tableview cells\' heights to be dynamically sized, I have implemented in

Answer 1

This strange bug was solved through Interface Builder parameters as the other answers did not resolve the issue.

All I did was make the default label size larger than the content potentially could be and have it reflected in the estimatedRowHeight height too. Previously, I set the default row height in Interface Builder to 88px and reflected it like so in my controller viewDidLoad():

self.tableView.rowHeight = UITableViewAutomaticDimension
self.tableView.estimatedRowHeight = 88.0

But that didn't work. So I realized that content wouldn't ever become larger than maybe 100px, so I set the default cell height to 108px (larger than the potential content) and reflected it like so in the controller viewDidLoad():

self.tableView.rowHeight = UITableViewAutomaticDimension
self.tableView.estimatedRowHeight = 108.0

This actually allowed the code to shrink down the initial labels to the correct size. In other words, it never expanded out to a larger size, but could always shrink down... Also, no additional self.tableView.reloadData() was needed in viewWillAppear().

I know this does not cover highly variable content sizes, but this worked in my situation where the content had a maximum possible character count.

Not sure if this is a bug in Swift or Interface Builder but it works like a charm. Give it a try!

Answer 2

When using a static UITableView, I set all the values in the UILabels and then call tableView.reloadData().

Answer 3

Use this:

tableView.rowHeight = UITableViewAutomaticDimension
tableView.estimatedRowHeight = 300

and don't use: heightForRowAtIndexPath delegate function

Also, in the storyboard don't set the height of the label that contains a large amount of data. Give it top, bottom, leading, trailing constraints.

Answer 4

For Swift i checked this answer in iOS 9.0 and iOS 11 also (Xcode 9.3)

func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
    return UITableViewAutomaticDimension
}

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

Here you need to add top, bottom, right and left constraints

Answer 5

Set proper constraint and update delegate methods as:

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

This will resolve dynamic cell height issue. IF not you need to check constraints.

Answer 6

For objective c this is one of my nice solution. it's worked for me.

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    cell.textLabel.text = [_nameArray objectAtIndex:indexPath.row];
    cell.textLabel.numberOfLines = 0;
    cell.textLabel.lineBreakMode = NSLineBreakByWordWrapping;
}

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

We need to apply these 2 changes.

1)cell.textLabel.numberOfLines = 0;
  cell.textLabel.lineBreakMode = NSLineBreakByWordWrapping;

2)return UITableViewAutomaticDimension;