StackOverflow2013

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POHow to crop an UITextView
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copied!<p>I would like to have two UITextViews, one in the background and one in the front. Is there any possibility to crop 50% of the one in the foreground so that you can see 50% of the one in the background? I do not want to re-size the UITextView in the front, but merely to hide half of it.</p> <p>I think an illustration is in place as this might sound rather confusing:</p> <p><img src="https://i.stack.imgur.com/4gWw6.png" alt="enter image description here"></p> <p>I thought I do this with two view controllers, one hidden, one visible:</p> <pre><code>// Visible and Hidden View VisibleView *visibleController = [[VisibleView alloc] initWithNibName:@"VisibleView" bundle:nil]; self.visibleView = visibleController; [visibleController release]; HiddenView *hiddenController = [[HiddenView alloc] initWithNibName:@"HiddenView" bundle:nil]; self.hiddenView = hiddenController; [hiddenController release]; [self.view insertSubview:visibleView.view atIndex:0]; // show visibleView </code></pre> <p>Ideally, I would like to animate the 'hiding' of the visibleView Controller, so that the hiddenViewController unveils in the background (like a sliding door - sliding in from the right). This is what I've come up so far, but I can't think of any transformation / cropping technique that will do:</p> <pre><code>[UIView beginAnimations:@"Hide VisibleView" context:nil]; [UIView setAnimationDuration:0.5]; [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; [UIView setAnimationTransition: ?? forView: self.view cache: YES]; [visibleView.view removeFromSuperview]; [self.view insertSubview:hiddenView.view atIndex:0]; [UIView commitAnimations]; </code></pre> <p>I guess this is quite basic, but I'm still a beginner and would be very happy over any suggestions of how to accomplish this.</p>

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