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// in a UITableViewController (or any other view controller with a UITableView) | |
- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator | |
{ | |
UIView *header = [[UIView alloc] initWithFrame:CGRectMake(0, 0, size.width, 0)]; // You might have to set height to 9999 or very high | |
header.translatesAutoresizingMaskIntoConstraints = NO; | |
// [add subviews and their constraints to header] | |
NSLayoutConstraint *headerWidthConstraint = [NSLayoutConstraint | |
constraintWithItem:header attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual | |
toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0f constant:size.width | |
]; | |
[header addConstraint:headerWidthConstraint]; | |
// Needed for iOS 7 >>> | |
[header setNeedsLayout]; | |
[header layoutIfNeeded]; | |
// <<< | |
CGFloat height = [header systemLayoutSizeFittingSize:UILayoutFittingCompressedSize].height; | |
[header removeConstraint:headerWidthConstraint]; | |
header.frame = CGRectMake(0, 0, size.width, height); | |
header.translatesAutoresizingMaskIntoConstraints = YES; | |
self.tableView.tableHeaderView = header; | |
} | |
- (void)viewWillAppear:(BOOL)animated | |
{ | |
[super viewWillAppear:animated]; | |
[self viewWillTransitionToSize:self.tableView.bounds.size withTransitionCoordinator:nil]; | |
} |
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