A split view controller that can display up to three view controllers on the same screen.

TOSplitViewController is a very 'light' re-implementation of UISplitViewController. It behaves like UISplitViewController for the most part, but is capable of showing up to 3 columns on some of the larger screens such as the 12.9" iPad Pro, or a regular iPad in landscape orientation.

• Can display 1 to 3 view controllers on screen at the same time depending on the size of the device screen at the time.
• Handles dynamically collapsing view controllers in separate columns into each other when the screen size changes.
• Plays an elegant transition animation when device rotations require the number of columns to change.
• Exposes as much functionality as possible through delegate methods, and UIViewController categories to allow subclasses to override this behaviour.

Due to the way split view controllers work, it's necessary to create all view controllers ahead of time since a split view controller can be presented collapsed, but then expand at a later time:

#import "TOCropViewController.h"

PrimaryViewController *mainController = [[PrimaryViewController alloc] initWithStyle:UITableViewStyleGrouped];
UINavigationController *primaryNavController = [[UINavigationController alloc] initWithRootViewController:mainController];

SecondaryViewController *secondaryController = [[SecondaryViewController alloc] init];
UINavigationController *secondaryNavController = [[UINavigationController alloc] initWithRootViewController:secondaryController];

DetailViewController *detailController = [[DetailViewController alloc] init];
UINavigationController *detailNavController = [[UINavigationController alloc] initWithRootViewController:detailController];

NSArray *controllers = @[primaryNavController, secondaryNavController, detailNavController];
TOSplitViewController *splitViewController = [[TOSplitViewController alloc] initWithViewControllers:controllers];
splitViewController.delegate = self;

Download this repository from GitHub and extract the zip file. In the extracted folder, import the folder name TOSplitViewController into your Xcode project. Make sure 'Copy items if needed` is checked to ensure it is properly copied to your project.

CocoaPods is a dependency manager that makes it much easier to integrate and subsequently update third party libraries in your app's codebase.

To integrate TOSplitViewController, simply add the following to your podfile:

pod 'TOSplitViewController'

Carthage support isn't offered at this time. Please feel free to file a PR. :)

iPad screen sizes drastically increased with the launch of the 12.9" iPad Pro. Apple took advantage of this by adding 3 column modes to some of iOS' system apps, including Mail and Notes, however this API wasn't made public to third party developers.

I have a design need for a three column display in one of my upcoming projects, and so I decided it would be worth the time and development resources to create this library.

It's still very much in its infancy, and the complexity required to managed 3 columns at once means there may still be plenty of bugs in it, so bug reports (And more importantly pull requests) are warmly welcomed. :)

TOSplitViewController was developed by Tim Oliver.

iPad Air 2 perspective mockup by Pixeden.

TOSplitViewController is available under the MIT license. Please see the LICENSE file for more information.