This app has a view controller on both the left and right sides. It supports rotation and is a universal app. Run it on the iPhone or iPad. Rotate it with the top view anchored to see how the layout is updated. You can swipe the top view to the left or right or tap on the buttons to trigger a transition.
All the code to accomplish this is in MEAppDelegate's application:didFinishLaunchingWithOptions:. You would normally create subclasses of the view controllers and keep your app delegate clean, but the focus of this example is to show how to configure a sliding view controller.
The interesting part of the code is how the layout is configured.
The following is a snippet from this app:
self.slidingViewController.anchorRightPeekAmount = 100.0;
self.slidingViewController.anchorLeftRevealAmount = 250.0;If you anchor the top view to the right side then rotate the device you'll notice that the top view stays "peeking" by 100 points. If you anchor to the left side and rotate, you'll notice the "revealed" portion stays at a fixed 250 points. This is the difference between "peek" and "reveal".
The under views in this example are configured to extend their tops and bottoms to the top and bottom edge of the container. The sides are configured to extend to the edge of the screen to where the top view is anchored.
This is done using the edgesForExtendedLayout property on UIViewController. The underLeftViewController is configured like this:
underLeftViewController.edgesForExtendedLayout = UIRectEdgeTop | UIRectEdgeBottom | UIRectEdgeLeft;We extend the edges to the top bottom and left. The underRightViewController looks like this:
underRightViewController.edgesForExtendedLayout = UIRectEdgeTop | UIRectEdgeBottom | UIRectEdgeRight;The edges are extended to the top bottom and right side.
If we extended all of the edges, the view will be the same size of the container. It would be partially covered by the top view when anchored.
If we removed UIRectEdgeTop in this example, then the top of the view will be placed below the status bar.
Copyright (c) 2013 Michael Enriquez (http://enriquez.me)
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