I'm getting an error on some code that two days ago was running fine. The error is:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFType extent]: unrecognized selector sent to instance 0x1bc8f0'
it points to this line on main.m:
return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
Using logs to see where my code gets to it seems this line is throwing the error:
greySave = [context createCGImage:greyscaleImage fromRect:[greyscaleImage extent]];
greySave is a CGImageRef, declared at the start of my view controller. It's simple grabbing a CIImage output and converting it to a CGImageRef for saving:
desaturate = [CIFilter filterWithName:@"CIColorMonochrome" keysAndValues:kCIInputImageKey, colourSave, @"inputIntensity", [NSNumber numberWithFloat:0.00], nil];
greyscaleImage = [desaturate valueForKey:@"outputImage"];
greySave = [context createCGImage:greyscaleImage fromRect:[greyscaleImage extent]];
The only thing I have changed that I think (although do not understand why) could be causing the problem is adding an extra conditional statement, which would apply a second filter is the user wishes to do so:
if ([_alphaButtonSavedState isEqualToString:@"ON"]) {
NSLog(@"user does want alpha on greyscale");
//user wants alpha mask also
} else {
NSLog(@"user does not want alpha on greyscale");
//convert to CGImage for saving
greySave = [context createCGImage:greyscaleImage fromRect:[greyscaleImage extent]];
NSLog(@"greySave cgimage created");
//save the grey image
[library writeImageToSavedPhotosAlbum:greySave metadata:[greyscaleImage properties] completionBlock:^(NSURL *assetURL, NSError *error){
if (error) {
NSLog(@"ERROR in greyscale save: %@", error);
} else
{
NSLog(@"SUCCESS in greyscale save");
//in here we'll put a nice animation or something
//CGImageRelease(greyscaleImage);
}
}];
Any ideas why this is happening?
Thanks.
EDIT:
Here is the entire chunk of code, just in case that helps.
[stillImage captureStillImageAsynchronouslyFromConnection:videoConnection completionHandler:^(CMSampleBufferRef imageSampleBuffer, NSError *error) {
NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageSampleBuffer]; //get the raw image data from the session
UIImage *startImage = [[UIImage alloc] initWithData:imageData]; //create a UIImage from that image data, let's us work with it
//resizing of image to take place before anything else
UIImage *image = [UIImage imageWithImage:startImage scaledToSize:_exportSSize]; //scale the image so it's shortest side is the size given in prefs
NSLog(@"image width post scale: %g", image.size.width);
NSLog(@"image height post scale is: %g", image.size.height);
//change the context to render using cpu, so on app exit renders get completed
context = [CIContext contextWithOptions: [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES] forKey:kCIContextUseSoftwareRenderer]];
//new crop testing - not using CIImage - seems to work, just need to sort out crop region
CGRect cropRect = CGRectMake(0, 0, _exportSize, _exportSize);
UIImage *cropper = [self imageByCropping:image toRect:cropRect];
//the colour image is always saved so create a CGImage to save later
colourSave = [cropper CGImage];
NSLog(@"coloursave image created");
//now we convert and create CGImages based upon chosen export options
if ([_greyButtonSavedState isEqualToString:@"ON"]) {
NSLog(@"inside the greyscale conditional");
//user wants greyscale image
//create a CIMonochrome filter
desaturate = [CIFilter filterWithName:@"CIColorMonochrome" keysAndValues:kCIInputImageKey, colourSave, @"inputIntensity", [NSNumber numberWithFloat:0.00], nil];
NSLog(@"desat ci filter created");
//get the output
greyscaleImage = [desaturate valueForKey:@"outputImage"];
NSLog(@"dest output image created");
//if the user wants to add the alpha
if ([_alphaButtonSavedState isEqualToString:@"ON"]) {
NSLog(@"user does want alpha on greyscale");
//user wants alpha mask also
} else {
NSLog(@"user does not want alpha on greyscale");
//convert to CGImage for saving
greySave = [context createCGImage:greyscaleImage fromRect:[greyscaleImage extent]];
NSLog(@"greySave cgimage created");
//save the grey image
[library writeImageToSavedPhotosAlbum:greySave metadata:[greyscaleImage properties] completionBlock:^(NSURL *assetURL, NSError *error){
if (error) {
NSLog(@"ERROR in greyscale save: %@", error);
} else
{
NSLog(@"SUCCESS in greyscale save");
//in here we'll put a nice animation or something
}
}];
}
}
-- two more conditionals here, both currently empty
-- followed by a save for the colourSave image, this works fine.
-- then the method ends.
One more thing, this is how I'm cropping the image. The returned image from the following method is what I create a CIImage from:
-(UIImage *)imageByCropping:(UIImage *)imageToCrop toRect:(CGRect)rect
{ CGImageRef imageRef = CGImageCreateWithImageInRect([imageToCrop CGImage], rect);
UIImage *cropped = [UIImage imageWithCGImage:imageRef];
CGImageRelease(imageRef);
return cropped;
}
