ECSlidingViewController is a view controller container for iOS that presents its child view controllers in two layers. It provides functionality for sliding the top view to reveal the views underneath it. This functionality is inspired by the Path 2.0 and Facebook iPhone apps.

ECSlidingViewController Demo from EdgeCase on Vimeo.

This project is an example app that showcases the uses for ECSlidingViewController. This app uses storyboards, but it is not required.

• Panning gesture to move top view can be set on any UIView. It is most likely a navigation bar or the whole top view itself.
• Configurable anchor positions, with automatic adjustments for orientation change. See "Anchor Position Geometry" section below.
• There are no assumptions about the size and layout of the views under the top view. See the underLeftWidthLayout and underRightWidthLayout properties if you need a common layout.
• The child views can be changed at anytime.
• Child view controllers can be an instance of UIViewController or any subclass of UIViewController including UINavigationController and UITabBarController.
• iPad support.
• See ECSlidingViewController/Vendor/ECSlidingViewController/ECSlidingViewController.h for options and configuration.

• iOS 5
• ARC

This section will walk through of a simplified version of the included example app. You'll see how to setup the top view that can be panned to the right side to reveal the under left view.

You'll need these four files:

• ECSlidingViewController/Vendor/ECSlidingViewController/ECSlidingViewController.h
• ECSlidingViewController/Vendor/ECSlidingViewController/ECSlidingViewController.m
• ECSlidingViewController/Vendor/ECSlidingViewController/UIImage+ImageWithUIView.h
• ECSlidingViewController/Vendor/ECSlidingViewController/UIImage+ImageWithUIView.m

OR - you can use CocoaPods. Add the following line to your Podspec:

pod 'ECSlidingViewController', '~> 0.10.0'

Add a UIViewController to your storyboards and set the subclass to ECSlidingViewController. Then, you'll need to configure the instance of this view controller by setting a topViewController

  ECSlidingViewController *slidingViewController = (ECSlidingViewController *)self.window.rootViewController;
  
  slidingViewController.topViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"FirstTop"];

In this example, we can get a reference to the ECSlidingViewController instance then, we set the topViewController with an instance of a UIViewController subclass called FirstTopViewController that is identified as "FirstTop".

The top view controller is responsible for two things:

• Setting the view controllers underneath it.
• Adding the panGesture to a UIView.

To do these, you must first add an #import "ECSlidingViewController.h" to the FirstTopViewController header. Then in the implementation you'll have access to a category on UIViewController called slidingViewController. This the top-level instance of the ECSlidingViewController container. With this instance, you can set the view controllers underneath the top view and add panning.

Below is the viewWillAppear: method for FirstTopViewController.

- (void)viewWillAppear:(BOOL)animated
{
  [super viewWillAppear:animated];
  
  if (![self.slidingViewController.underLeftViewController isKindOfClass:[MenuViewController class]]) {
    self.slidingViewController.underLeftViewController  = [self.storyboard instantiateViewControllerWithIdentifier:@"Menu"];
  }
  
  [self.view addGestureRecognizer:self.slidingViewController.panGesture];
  [self.slidingViewController setAnchorRightRevealAmount:280.0f];
}

The above code will conditionally set the underLeftViewController if it is not already there. Then, it adds the gesture recognizer to the top view. The last line of code specifies the top view's anchor position on the right side.

There are four properties related to anchor positions. They are a combination of left, right, reveal amount, and peek amount. The diagrams below demonstrate the difference between peek and reveal.

• anchorLeftPeekAmount
• anchorRightPeekAmount
• anchorLeftRevealAmount
• anchorRightRevealAmount

Below is an example of the anchorRightPeekAmount set:

Below is an example of the anchorRightRevealAmount set:

ECSlidingViewController handles the shadowOffset, shadowPath, and their rotations for you automatically. The following code in your top view controller will add a shadow:

- (void)viewWillAppear:(BOOL)animated
{
  [super viewWillAppear:animated];

  self.view.layer.shadowOpacity = 0.75f;
  self.view.layer.shadowRadius = 10.0f;
  self.view.layer.shadowColor = [UIColor blackColor].CGColor;
}

Copyright (C) 2013 EdgeCase

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The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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