Async Blur

Easiest way to blur images on iOS.

Async blur provides api for blurring images and perform some optimizations inside.

Optimizations:

use own queue with background priority for render
use vImageTentConvolve from AccelerateKit for blur. It's extremely fast!
downscale image to size of passed image view or to size of screen before blur
check blur operations in queue and delete unnecessary. You can use AsyncBlur for progress blur render.

There are two ways to use it:

ABImageView

Just modify .blurRadius property.

ABImageView *imageView = [[ABImageView alloc] initWithImage:[UIImage imageNamed:@"example"]];
imageView.blurRadius = 10;

ABManager

Can be used if you need blurred UIImage.

__weak typeof(self) wSelf = self;
[ABManager renderBlurForImage:image forImageView:self.backgroundImageView radius:blurRadius withCallback:^(UIImage *blurredImage) {
    typeof(self) sSelf = self;
    self.backgroundImageView.image = blurredImage;
    self.otherImageView.image = blurredImage;
}];

Author

Vladislav Dugnist, vdugnist@gmail.com

License

AsyncBlur is available under the MIT license.

vdugnist/AsyncBlur