Applying effect to image

Question

I have an imageview in my app and I have loaded image from phone photo library. Now I want to apply effect on this image but the code that I have written is giving me error.My code is as follows.Any help will be appreciated.

CIImage *beginImage =
[CIImage imageWithContentsOfURL:self.imageView.image];

// 1
CIContext *context = [CIContext contextWithOptions:nil];

CIFilter *filter = [CIFilter filterWithName:@"CISepiaTone"
                              keysAndValues: kCIInputImageKey, beginImage,
                    @"inputIntensity", @0.8, nil];
CIImage *outputImage = [filter outputImage];

// 2
CGImageRef cgimg =
[context createCGImage:outputImage fromRect:[outputImage extent]];

// 3
UIImage *newImage = [UIImage imageWithCGImage:cgimg];
self.imageView.image = newImage;

// 4
CGImageRelease(cgimg);

Answer 1

Use this Code

    CIImage *ciImage = self.imageView.image.CIImage;

instead of

   CIImage *beginImage =
           [CIImage imageWithContentsOfURL:self.imageView.image];

Answer 2

Try to initailize the your CIImage object like this

CIImage *ciImage = self.imageView.image.CIImage;