alvarofranco / afblursegue

Custom UIStoryboardSegue implementation for blurring the background of a modal view controller

AFBlurSegue

Now supports iOS 8 real time blur and rotation

AFBlurSegue is a UIStoryboardSegue custom implementation that will blur the background of your modal view controller automatically.

##Installation

If you're using CocoaPods, just add this line to your Podfile:

pod 'AFBlurSegue', '~> 1.2.1'

If you're not, import these files to your project:

AFBlurSegue.h
AFBlurSegue.m
UIImage+ImageEffects.h
UIImage+ImageEffects.h

##Usage

Since it's a Storyboard Segue custom implementation, you can start using it right from Storyboard. If you have your segue already created, just change it to Custom and the set AFBlurSegue as segue class.

If you have to create your segue, create a new one by holding right click from the inital view controller to the destination view controller. It will appear a box like on the image below. Select "blur" and it will automatically will asign AFBlurSegue as segue class. Then set an identifier to the segue.

For presenting the view controller, call -performSegueWithIdentifier:sender::

[self performSegueWithIdentifier:@"blurSegue" sender:self];

Customization (not available from iOS 8 or above, because native blurring is used)

You can customize a few things such as the blur radius, tint color, saturation delta factor and modal transition style. To do this, import the class into your class:

#import "AFBlurSegue.h"

For customizing it, let's use -prepareForSegue:sender:

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

	UIViewController *destination = segue.destinationViewController;
	destination.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;

	AFBlurSegue *blurSegue = (AFBlurSegue *)segue;
	blurSegue.blurRadius = 20;
	blurSegue.tintColor = [UIColor colorWithRed:0 green:1 blue:0 alpha:0.1];
	blurSegue.saturationDeltaFactor = 0.5;
}

I highly recommend using UIModalTransitionStyleCrossDissolve or UIModalTransitionCoverVertical for better results. These animations looks really great with the blur effect.

##Blur method

Since there's no public API already for blur effect, we have to find some workarounds. A lot of blurring classes are currently using the famous UIToolbar hack. Since UIToolbar have native blur, you can change its size and use it as a blur container. AFBlurSegue uses the UIImage+ImageEffects class provided by Apple.

##License AFBlurSegue is under MIT license so feel free to use it!

##Author Made by Alvaro Franco. If you have any question, feel free to drop me a line at [email protected]

afblursegue's Issues

Unable to customise segue in iOS 8

Updated values in prepareForSegue:sender: however, changes for blur radius, tint colour or saturation delta factor are not reflected in iOS 8.

Feature request: support Carthage

https://github.com/Carthage/Carthage#supporting-carthage-for-your-framework

Problem when rotating to landscape view on iPad

It doesn't automatically resize the view when you rotate the modal view controller on the iPad. The workaround I am using is to disable rotation for the modal view controller only using the solution posted on http://stackoverflow.com/questions/19601235/prevent-autorotate-for-one-view-controller-ios7 but I wish this could be fixed so that I wouldn't have to resort to that.

New update to fix rotation doesn't work for iOS 7

When I run the demo of the new update under iOS 7.1, you can see that after bringing up the modal view controller, if you rotate it to the left, you still end up with a black side on the right; so it looks like it may work only for the upcoming iOS 8. Also, when I add the classes to my project, Xcode throws up warnings over UIVisualEffects, which again may be iOS 8 specific.

any way to do it with presentViewController: ?

Black tint

Awesome custom segue! Is there a way to make a this segue have a black tint? Right now I'm changing the tint color but it doesn't affect anything. It just looks like a blurred window (clear).

Realizing this may be an issue for iOS 8 where you can't customize segs

CocoaPod update after iOS8 tint (style) fix

As per title, please can you update the pod spec with a newer version now that the iOS8 tint style has been exposed? Thanks!

Weird shadow after segue (iOS 8)

After performing a blur segue, on the right hand side I'm getting a shadow effect running from top to bottom and I can't figure out what's causing it. Any ideas? Thanks!

Analyzer issue: Value stored into background image is never read

In AFBlurSegue.m, line 35:

UIImage *background = [UIImage new];

This initialization is unnecessary and triggers an error in Xcode Analyzer.

viewDidAppear not called after dismissing presented controller

Title pretty much says it all: viewDidAppear is not called on the presenting viewController after the presented viewController is dismissed

setUseDefaultModalPresentationStyle - unrecognized selector sent to instance

Hey there, the library works perfectly on iOS8+. However on iOS 7, I keep getting this error:

2015-10-08 11:27:50.762 APPNAME[3104:60b] -[AFBlurSegue setUseDefaultModalPresentationStyle:]: unrecognized selector sent to instance 0x17dc01b0
2015-10-08 11:27:50.771 APPNAME[3104:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[AFBlurSegue setUseDefaultModalPresentationStyle:]: unrecognized selector sent to instance 0x17dc01b0'
*** First throw call stack:
(0x2f0f4f83 0x398a5ccf 0x2f0f8917 0x2f0f7203 0x2f046768 0x31dee381 0x31de43fb 0x31a3000f 0x31ae2357 0x319916d5 0x3190a53b 0x2f0c0255 0x2f0bdbf9 0x2f0bdf3b 0x2f028ebf 0x2f028ca3 0x33f2e663 0x3197514d 0xaae38 0x39db2ab7)
libc++abi.dylib: terminating with uncaught exception of type NSException

I can't seem to find this method in the library, so do you know what's causing the problem?

Edit: StackOverflow question

Not working on iOS 9.2.1

When applying the transition, the blur effect is not showing, the destination view shows an gray/dark opaque background totally covering the presenting view controller. Any ideas? Thanks.