- CIContext *context = [CIContext contextWithOptions:nil];
- CIImage *inputImage = [[CIImage alloc] initWithImage:[UIImage imageNamed:@"1.png"]];
- // create gaussian blur filter
- CIFilter *filter = [CIFilter filterWithName:@"CIGaussianBlur"];
- [filter setValue:inputImage forKey:kCIInputImageKey];
- [filter setValue:[NSNumber numberWithFloat:10.0] forKey:@"inputRadius"];
- // blur image
- CIImage *result = [filter valueForKey:kCIOutputImageKey];
- CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
- UIImage *image = [UIImage imageWithCGImage:cgImage];
- CGImageRelease(cgImage);
- self.mainImageView.image = image;
来源: http://www.phpxs.com/code/1005499/