Hey everybody i have a TableHeaderView and everything gets managed by Autolayout:
The UIImageView at the top should be always 2:1, so i set the Aspect ration and the Rest of the needed Constraints.
The 4 UIButtons should be always horizontal and should have the same Height and Width. So i worked with Equal Width and Equal Height and also with a Aspect Ratio of 1:1
And i have two UILabels with numberOfLines set to 0. I also made a Subclass of my UILabel, because of the preferredMaxLayoutWidth, like this:
- (void) layoutSubviews
{
[super layoutSubviews];
if ( self.numberOfLines == 0 )
{
if ( self.preferredMaxLayoutWidth != self.frame.size.width )
{
self.preferredMaxLayoutWidth = self.frame.size.width;
[self setNeedsUpdateConstraints];
}
}
}
This is my Code:
- (void)initializeHeaderViewLabels
{
//After the Response from my server arrived i set the tableHeaderView with the Textdata
self.tableView.tableHeaderView = nil;
if((self.contentDict[@"title"]) != [NSNull null])
{
self.headerTitleLabel.text = (self.contentDict[@"title"]);
}
if((self.contentDict[@"shortDescription"]) != [NSNull null])
{
self.headerDescriptionLabel.text = (self.contentDict[@"shortDescription"]);
}
[self.headerView setNeedsLayout];
[self.headerView layoutIfNeeded];
CGFloat height = [self.headerView systemLayoutSizeFittingSize:UILayoutFittingCompressedSize].height;
CGRect headerFrame = self.headerView.frame;
headerFrame.size.height = height;
self.headerView.frame = headerFrame;
[self.tableView setTableHeaderView:self.headerView];
}
I get my Image and the Text for the UILabels from my Server, so i have to wait until the Response arrives, then i call initializeHeaderViewLabels.
**My Problem is that the tableHeaderView is way too large during Runtime and so my UILabels get stretched and there is a lot of whiteSpace. Maybe i miss something?
In order to make it work you'll need some magic or migrate away from table header view. I've already answered on a similar question here. The trick is to magically reset tableHeaderView after evaluating it's height via autolayout. I've created sample project for that: TableHeaderView+Autolayout.