iOS8 How dynamically fixed UITableViewHeaderFooterView height size?

Question

I use the method as follows

I have just tried below lines of code, dynamically set the UITableViewHeaderFooterView height size.

self.tableView.estimatedSectionHeaderHeight = 100 self.tableView.sectionHeaderHeight = UITableViewAutomaticDimension

I have the following problems

In iOS9, iOS10 can run normally, and can display properly. But can not be displayed correctly in iOS8, and the following error is displayed:

My analysis is as follows:

From the error prompt, I can see that the problem is NSLayoutConstraint: 0x7f8498d7b890 _UITableViewHeaderFooterContentView: 0x7f8498cb9200.height == 0

But I have never made any Constraints to UITableViewHeaderFooterContentView

How should I fit iOS8?

Call the `updateConstraintsIfNeeded` method when you return your cell inside the `table view cell for row at` method. `cell.updateConstraintsIfNeeded() return cell` This step is NOT needed for iOS 9+ — Vignesh Davins, Jul 07 '17 at 05:45
In order to make UITableViewAutomaticDimension work you have to set all left, right, bottom, and top constraints relative to cell container view. Check did u added all four constraints... — Vignesh Davins, Jul 07 '17 at 06:03

score 1 · Answer 1 · answered Jul 07 '17 at 08:58

You need to use the UIView systemLayoutSizeFittingSize:

-(void)viewDidLayoutSubviews
    {
        [super viewDidLayoutSubviews];

        [ViewHeader setNeedsLayout];
        [ViewHeader layoutIfNeeded];
        CGFloat height = [ViewHeader systemLayoutSizeFittingSize:UILayoutFittingCompressedSize].height;

        CGRect headerFrame = ViewHeader.frame;
        headerFrame.size.height = height;
        ViewHeader.frame = headerFrame;
        [tbl setTableHeaderView:ViewHeader];
    }

iOS8 How dynamically fixed UITableViewHeaderFooterView height size?

1 Answers1