KLCircleViewController 1.0

KLCircleViewController 1.0

LangLanguage Obj-CObjective C
License Apache 2
ReleasedLast Release Dec 2014

Maintained by Unclaimed.

  • By
  • Kieran Lafferty

A control that allows panning between view controllers as inspired by the Circle app.

Note: KLCircleViewController is intended for use with portrait orientation on iPhone/iPod Touch/iPad.

Requires ARC

Check out the Demo Excuse the graphics glitches and lag due to my slow computer.


1. Drag the KLCircleViewController.xcodeproj to your existing project
2. Under Build Phases on your project's Xcode Project file add 'KLCircleViewController(KLCircleViewController)' to your Target Dependancies
3. Under Build on your Xcode Project file add 'libKLCircleViewController' & QuartzCore.framework under Link Binary With Libraries
4. Include #import <KLCircleViewController/KLCircleViewController.h> in any file you wish to use


Import the header file and declare your controller to subclass KLScrollViewController

#import <KLCircleViewController/KLCircleViewController.h>
[[KLCircleViewController alloc] initWithCenterViewController: center
                                          leftViewController: left
                                         rightViewController: right
                                        bottomViewController: bottom];

To omit a view controller, pass in nill as follows:

[[KLCircleViewController alloc] initWithCenterViewController: center
                                          leftViewController: left
                                         rightViewController: nil
                                        bottomViewController: nil];                                     

Note: Center view controller can never be nil as it is default

To invalidate/remove a view controller after instantiation set the property to nil

[self.circleViewController setLeftViewController: nil];     

Note: As mentioned above, this can not be done for the center view controller as it is required.

Reference to KLCircleViewController from child View Controllers

A category has been added to UIViewController that allows any UIViewController to access the KLCircleViewController from within the child. This reference will only exist for the span of time that the child is truly contained within the KLCircleViewController instance. If the KLCircleViewController removes the UIViewController then it can no longer be referenced and will return nil.

#import "KLCircleViewController.h"
KLCircleViewController circleController = self.circleController;
//Do whatever useful things you may need to do with this reference here

Registering for callbacks

Callbacks are all handled by blocks.

[self.circleVC setWillTransitionState: ^(KLCircleViewController* circleViewController, KLCircleState fromState,
                                        KLCircleState toState) {
                                            //Do something useful here
[self.circleVC setDidTransitionState:^(KLCircleViewController* circleViewController, KLCircleState fromState,
                                      KLCircleState toState) {
                                          //Do something useful here


Use Doxygen (http://www.stack.nl/~dimitri/doxygen/download.html) to generate the documentation using the doxygen file in the root of the repository.



Copyright 2013 Kieran Lafferty

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at


Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.