iOS 7/8 style blurred view controller that appears on top of your view controller

by iOS Example

REFrostedViewController

iOS 7/8 style blurred view controller that appears on top of your view controller.

Requirements

  • Xcode 6 or higher
  • Apple LLVM compiler
  • iOS 6.0 or higher
  • ARC

Demo

Build and run the REFrostedViewControllerExample project in Xcode to see REFrostedViewController in action.

Installation

CocoaPods

The recommended approach for installating REFrostedViewController is via the CocoaPods package manager, as it provides flexible dependency management and dead simple installation.
For best results, it is recommended that you install via CocoaPods >= 0.28.0 using Git >= 1.8.0 installed via Homebrew.

Install CocoaPods if not already available:

$ [sudo] gem install cocoapods
$ pod setup

Change to the directory of your Xcode project:

$ cd /path/to/MyProject
$ touch Podfile
$ edit Podfile

Edit your Podfile and add REFrostedViewController:

platform :ios, '6.0'
pod 'REFrostedViewController', '~> 2.4'

Install into your Xcode project:

$ pod install

Open your project in Xcode from the .xcworkspace file (not the usual project file)

$ open MyProject.xcworkspace

Please note that if your installation fails, it may be because you are installing with a version of Git lower than CocoaPods is expecting. Please ensure that you are running Git >= 1.8.0 by executing git --version. You can get a full picture of the installation details by executing pod install --verbose.

Manual Install

All you need to do is drop REFrostedViewController files into your project, and add #include "REFrostedViewController.h" to the top of classes that will use it.

Your project must be linked against the Accelerate framework.

Example Usage

In your AppDelegate's - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions create the view controller and assign content and menu view controllers.

// Create content and menu controllers
//
DEMONavigationController *navigationController = [[DEMONavigationController alloc] initWithRootViewController:[[DEMOHomeViewController alloc] init]];
DEMOMenuViewController *menuController = [[DEMOMenuViewController alloc] initWithStyle:UITableViewStylePlain];

// Create frosted view controller
//
REFrostedViewController *frostedViewController = [[REFrostedViewController alloc] initWithContentViewController:navigationController menuViewController:menuController];
frostedViewController.direction = REFrostedViewControllerDirectionLeft;

// Make it a root controller
//
self.window.rootViewController = frostedViewController;

You can present it manually:

[self.frostedViewController presentMenuViewController];

or using a pan gesture recognizer:

- (void)panGestureRecognized:(UIPanGestureRecognizer *)sender
{
    [self.frostedViewController panGestureRecognized:sender];
}

Live Blur

By default, live blurring is enabled under iOS 7. The live blurring is performed by using a UIToolbar as a background view, that means when you change its tint color, it becomes desaturated. That's the way it works on iOS 7. iPhone 4 doesn't support live blur and falls back to a transparent view. This also applies to when a user device has high contrast accessibility setting set to on.
To disable live blurring, set liveBlur property to NO.

Storyboards Example

  1. Create a subclass of REFrostedViewController. In this example we call it DEMORootViewController.
  2. In the Storyboard designate the root view's owner as DEMORootViewController.
  3. Make sure to #import "REFrostedViewController.h" in DEMORootViewController.h.
  4. Add more view controllers to your Storyboard, and give them identifiers "menuController" and "contentController". Note that in the new XCode the identifier is called "Storyboard ID" and can be found in the Identity inspector.
  5. Add a method awakeFromNib to DEMORootViewController.m with the following code:

- (void)awakeFromNib
{
    self.contentViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"contentController"];
    self.menuViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"menuController"];
}

Customization

You can customize the following properties of REFrostedViewController:

@property (strong, readonly, nonatomic) UIPanGestureRecognizer *panGestureRecognizer;
@property (assign, readwrite, nonatomic) BOOL panGestureEnabled;
@property (assign, readwrite, nonatomic) REFrostedViewControllerDirection direction;
@property (assign, readwrite, nonatomic) CGFloat backgroundFadeAmount;
@property (strong, readwrite, nonatomic) UIColor *blurTintColor; // Used only when live blur is off
@property (assign, readwrite, nonatomic) CGFloat blurRadius; // Used only when live blur is off
@property (assign, readwrite, nonatomic) CGFloat blurSaturationDeltaFactor; // Used only when live blur is off
@property (assign, readwrite, nonatomic) NSTimeInterval animationDuration;
@property (assign, readwrite, nonatomic) BOOL limitMenuViewSize;
@property (assign, readwrite, nonatomic) CGSize menuViewSize;
@property (assign, readwrite, nonatomic) BOOL liveBlur; // iOS 7 only
@property (assign, readwrite, nonatomic) REFrostedViewControllerLiveBackgroundStyle liveBlurBackgroundStyle; // iOS 7 only

GitHub