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    <p>I'm assuming you're using the default UICollectionViewDelegateFlowLayout, right? Then make sure you respond accordingly to the delegate methods, and when the pinch gesture occurs, simply invalidate the layout.</p> <p>For example, if I want to adjust the size of every item, while pinching:</p> <pre><code>@interface ViewController () &lt;UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout&gt; @property (nonatomic,assign) CGFloat scale; @property (nonatomic,weak) IBOutlet UICollectionView *collectionView; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; self.scale = 1.0; [self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"cell"]; UIPinchGestureRecognizer *gesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(didReceivePinchGesture:)]; [self.collectionView addGestureRecognizer:gesture]; } - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath { return CGSizeMake(50*self.scale, 50*self.scale); } - (void)didReceivePinchGesture:(UIPinchGestureRecognizer*)gesture { static CGFloat scaleStart; if (gesture.state == UIGestureRecognizerStateBegan) { scaleStart = self.scale; } else if (gesture.state == UIGestureRecognizerStateChanged) { self.scale = scaleStart * gesture.scale; [self.collectionView.collectionViewLayout invalidateLayout]; } } </code></pre> <p>The property <code>self.scale</code> is just for show, you can apply this same concept to any other attribute, this doesn't require a beginUpdates/endUpdates because the user himself is carrying the timing of the scale.</p> <p><a href="https://github.com/CanTheAlmighty/SamplePinchGesture">Here's a running project</a>, in case you want to see it in action.</p>
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    1. POzoom entire UICollectionView
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    1. CO+1 Thanks! Checked your demo and its really useful. Can you guide on how we can show these transitions with a nice animation...I am a newbie to UICollectionView.
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    2. COGreat answer, curious if you have any insight on what to do if the layout is more 'fixed' and you want to zoom in / out and pan around (not move the items). Think of a map for instance with items on the map being UICollectionCells and tiles potentially being reusableviews or similar.
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    3. CO@MobileVet For my thesis I wrote a custom UICollectionViewLayout that creates something like a map, and its entirely possible. If you make the content size that the collection view layout reports larger with a scale factor, then you can have both zooming and panning.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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