smileyborg

// UICollectionView Objective-C example

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
        
    NSIndexPath *selectedIndexPath = [[self.collectionView indexPathsForSelectedItems] firstObject];
    if (selectedIndexPath != nil) {
        id<UIViewControllerTransitionCoordinator> coordinator = self.transitionCoordinator;
        if (coordinator != nil) {
            [coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context) {

smileyborg

// For the best results, your tableHeaderView/tableFooterView should be a UITableViewHeaderFooterView with your content inside the contentView.
let tableHeaderView = UITableViewHeaderFooterView()
    
let fittingSize = CGSize(width: tableView.bounds.width - (tableView.safeAreaInsets.left + tableView.safeAreaInsets.right), height: 0)
let size = tableHeaderView.systemLayoutSizeFitting(fittingSize, withHorizontalFittingPriority: .required, verticalFittingPriority: .fittingSizeLevel)
tableHeaderView.frame = CGRect(origin: .zero, size: size)
tableView.tableHeaderView = tableHeaderView

// When you set this view to the tableHeaderView/tableFooterView on the table view, the table view will preserve the existing size of its frame.
// If you need to change the size, remove the tableHeaderView/tableFooterView, set a new frame on it, then re-set it on the table view again.

sberrevoets

- (CGSize)intrinsicContentSize {
	__block CGFloat minX = CGFLOAT_MAX;
	__block CGFloat maxX = CGFLOAT_MIN;
	__block CGFloat minY = CGFLOAT_MAX;
	__block CGFloat maxY = CGFLOAT_MIN;
	
	[[self subviews] enumerateObjectsUsingBlock:^(UIView *subview, NSUInteger idx, BOOL *stop) {
		// Ignore _UILayoutGuide
		if (![subview conformsToProtocol:@protocol(UILayoutSupport)]) {
			// We could use CGRectGet(Min|Max)(X|Y) using the subview.frame, but subview.frame is undefined when a transform is applied. This calculation is transform-friendly.

chrisvoss

- (void)stylePFLoadingViewTheHardWay
{
    UIColor *labelTextColor = [UIColor whiteColor];
    UIColor *labelShadowColor = [UIColor darkGrayColor];
    UIActivityIndicatorViewStyle activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhite;

    // go through all of the subviews until you find a PFLoadingView subclass
    for (UIView *subview in self.view.subviews)
    {
        if ([subview class] == NSClassFromString(@"PFLoadingView"))