Adding Zoom
Zooming is useful for helping the car valet see a license plate number or confirm that a particular scratch was already on a car. To enable a UIScrollView to zoom requires four main changes:
Adopting the UIScrollViewDelegate protocol in the car image view controller
Implementing the viewForZoomingInScrollView: protocol method
Connecting the scroll view delegate to the view controller
Specifying a maximum zoom level greater than 1.0 ...
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