https://github.com/Citrrus/BlurryModalSegue

A custom modal segue providing a blurred overlay effect.
https://github.com/Citrrus/BlurryModalSegue

Last synced: about 1 month ago
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A custom modal segue providing a blurred overlay effect.

• Host: GitHub
• URL: https://github.com/Citrrus/BlurryModalSegue
• Owner: Citrrus
• License: mit
• Created: 2013-11-21T22:27:00.000Z (almost 11 years ago)
• Default Branch: master
• Last Pushed: 2016-02-11T16:07:35.000Z (over 8 years ago)
• Last Synced: 2024-04-24T14:47:54.623Z (5 months ago)
• Language: Objective-C
• Homepage:
• Size: 1.54 MB
• Stars: 918
• Watchers: 29
• Forks: 71
• Open Issues: 5
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-ios - BlurryModalSegue - A custom modal segue for providing a blurred overlay effect. (UI / Transition)
• awesome-ios-star - BlurryModalSegue - A custom modal segue for providing a blurred overlay effect. (UI / Transition)

README

        
# BlurryModalSegue

BlurryModalSegue is a UIStoryboardSegue subclass that provides a blur effect for modal storyboard segues.  It provides the look and feel of a transparent modal overlay without deviating from the modal presentation model provided by Apple.

## Demo

![](assets/blurry_modal.gif)

## Installation

Via [CocoaPods](http://cocoapods.org):

```ruby

pod 'BlurryModalSegue'

```

## Usage

### Storyboard Usage

Change your modal storyboard segues from this:

![](assets/modal_storyboard.png)

To this:

![](assets/blurry_modal_storyboard.png)

Done!

_If nested view controllers are being presented (e.g., UINavigationController -> UIViewController), make sure to set the background color of any nested views to [UIColor clearColor] so the blurry UIImageView is visible_

### Custom Styling

BlurryModalSegue conforms to the UIAppearance protocol.  Configure it once across the app:

```objc

#import "BlurryModalSegue.h"

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

    [[BlurryModalSegue appearance] setBackingImageBlurRadius:@(20)];

    [[BlurryModalSegue appearance] setBackingImageSaturationDeltaFactor:@(.45)];

    

    return YES;

}

```

Additionally, you can customize individual instances before presentation, just implement ```prepareForSegue:sender:```:

```objc

#import "BlurryModalSegue.h"

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

{

    if ([segue isKindOfClass:[BlurryModalSegue class]])

    {

        BlurryModalSegue* bms = (BlurryModalSegue*)segue;

        

        bms.backingImageBlurRadius = @(20);

        bms.backingImageSaturationDeltaFactor = @(.45);

        bms.backingImageTintColor = [[UIColor greenColor] colorWithAlphaComponent:.1];

    }

}

```

### Troubleshooting

If you just see a solid color instead of a blurry background after performing a segue, ensure that the view controllers being presented don't have a background color set on their views.  This is common when presenting a UINavigationController that is in turn presenting a root view controller.  The UIImageView that contains the blurry image is added as a subview to the `-[UIStorybardSegue destinationViewController]`'s `view` property.  In the case of a presented UINavigationController, it immediately presents a child view controller.  If that view controller has a solid background color, it could completely hide the blurry UIImageView.

## Compatibility/Restrictions

* iOS7+ only, as we take advantage of the new ```UIViewControllerTransitionCoordinator```.

* ```UIModalTransitionStylePartialCurl``` is not supported and doesn't really make sense for this library.

* For ```UIModalTransitionStyleCoverVertical```, eagle-eyed developers will notice that the effect is better during presentation than dismissal.  This is because ```[UIViewController -transitionCoordinator]``` only seems to support the presentation, not the dismissal.  I believe the dismissal could be implented using the ```[UIViewController -transitioningDelegate]```, but that is TBD.

* Rotation after modal presentation is unsupported as the backing image will only be appropriate for the original orientation.

## Acknowledgements

* The blur effect in this library is courtesy of the [UIImage-BlurredFrame](https://github.com/Adrian2112/UIImage-BlurredFrame) library.