iOS CIImage 转 nadata

Question

  CIImage 怎么 转 NSData 呢？

Answer 1

不能直接转的话你可以过渡一下,把ciimage转成uiimage,然后再转成nsdata
UIImage *uiimage=[UIImage imageWithCIImage:ciimage];
NSData *imageData=[UIImageJPEGRepresentation(uiimage,1.0)];

Answer 2

已解决，谢谢！
            CIImage *ciImage = [CIImage imageWithCVPixelBuffer:pixelBuffer];
            _imgView.image = [UIImage imageWithCIImage:ciImage];
            
            CIContext *context = [CIContext contextWithOptions:nil];
            CIFilter * filter = [CIFilter filterWithName:@"CISepiaTone"];
            [filter setValue:ciImage forKey:kCIInputImageKey];
            [filter setValue:@1.0f forKey:kCIInputIntensityKey];
            CIImage *outputImg = [filter outputImage];
            CGImageRef cgImage = [context createCGImage:outputImg fromRect:[outputImg extent]];
            
            UIImage *takePhoto =  [UIImage imageWithCGImage:cgImage];
            
            NSUserDefaults *user = [NSUserDefaults standardUserDefaults];
            NSString *currentTimeName =[NSString stringWithFormat:@"%@",[user objectForKey:@"currentTimeName"]] ;
            NSLog(@"currentTimeName =%@",currentTimeName);
            
            // 文件以当前时间命名
            NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
            NSString *homePath = [paths objectAtIndex:0];
            NSString *imagePath =  [homePath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.png",currentTimeName]];
            NSLog(@"%@",imagePath);
            [UIImagePNGRepresentation(takePhoto) writeToFile: imagePath  atomically:YES];