UIImage Blur

gistfile1.m

- (UIImage *)blurredImageWithRadius:(CGFloat)radius {
 CIImage *inputImage = [[CIImage alloc] initWithCGImage:self.CGImage];

 CIFilter *blurFilter = [CIFilter filterWithName:@"CIGaussianBlur"];
 [blurFilter setDefaults];
 [blurFilter setValue:inputImage forKey:kCIInputImageKey];
 [blurFilter setValue:@(radius) forKey:@"inputRadius"];

 CIImage *outputImage = [blurFilter valueForKey:kCIOutputImageKey];
 CIContext *context = [CIContext contextWithOptions:nil];

 CGImageRef imageConvertedToCG = [context createCGImage:outputImage
                                               fromRect:inputImage.extent];
 UIImage *blurredImage = [UIImage imageWithCGImage:imageConvertedToCG
                                             scale:self.scale
                                       orientation:self.imageOrientation];
 CGImageRelease(imageConvertedToCG);
 return blurredImage;
}