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POcall c++ class within objective c one
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Id
5105177
data
AcceptedAnswerId
0
AnswerCount
3
ClosedDate
CommentCount
5
CommunityOwnedDate
CreationDate
2011-02-24T13:17:05.953
FavoriteCount
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2011-03-01T22:56:23.110
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2011-02-24T13:33:54.493
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611078
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PostTypeId
1
Score
0
ViewCount
510
LastEditorDisplayName
text
Body
I wrote c++ class that return uiimage (I made sure that it doesn't return null) and I am trying to call it from objective c obe (uiview based classs) as below code, the problem is that no image be displayed any suggestion to solve that , also when put the code of c++ class at the objective c class the image appear images imaging = new images(); // the c++ class .mm file <pre><code>NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *fullPath = [[paths lastObject] stringByAppendingPathComponent:ImageFileName]; NSLog(fullPath); @try { UIView* holderView = [[UIView alloc] initWithFrame:CGRectMake(0,0,self.view.bounds.size.width,self.view.bounds.size.height)]; viewer = [[UIImageView alloc] initWithFrame:[holderView frame]]; [viewer setImage:imaging->LoadImage(fullPath)]; viewer.contentMode = UIViewContentModeScaleAspectFit; //holderView.contentMode = UIViewContentModeScaleAspectFit ; [holderView addSubview:viewer]; [self.view addSubview:holderView]; } @catch (NSException * e) { NSLog(@"this was what happened: %a ",e); } </code></pre> this is a part of the loadimage, which create image from the buffer data try{ ............... CGDataProviderRef provider = CGDataProviderCreateWithData(NULL,MyFilter->GetOutput()->GetBufferPointer(), bufferLength, NULL); if(colorSpaceRef == NULL) { NSLog(@"Error allocating color space"); CGDataProviderRelease(provider); } <pre><code> CGImageRef iref = CGImageCreate(Width,Height,bitsPerComponent,bitsPerPixel,bytesPerRow, colorSpaceRef,bitmapInfo,provider,NULL,YES,renderingIntent); CGContextRef context = NULL; if ((Comptype==itk::ImageIOBase::SHORT)||(Comptype==itk::ImageIOBase::USHORT)) { context = CGBitmapContextCreate(MyFilter->GetOutput()->GetBufferPointer(), Width, Height, bitsPerComponent, bytesPerRow, colorSpaceRef, bitmapInfo); } else { context = CGBitmapContextCreate(myimg->GetBufferPointer(), Width, Height, bitsPerComponent, bytesPerRow, colorSpaceRef, bitmapInfo); } if(context == NULL) { NSLog(@"Error context not created"); } //Create the UIImage to be displayed UIImage * uiimage = nil; if (context) { CGContextDrawImage(context, CGRectMake(0.0f, 0.0f, Width, Height), iref); CGImageRef imageRef = CGBitmapContextCreateImage(context); //if([UIImage respondsToSelector:@selector(imageWithCGImage:scale:orientation:)]) { //float scale = [[UIScreen mainScreen] scale]; //uiimage = [UIImage imageWithCGImage:imageRef scale:scale orientation:UIImageOrientationUp]; //} else { uiimage = [UIImage imageWithCGImage:imageRef]; //} CGImageRelease(imageRef); CGContextRelease(context); } CGColorSpaceRelease(colorSpaceRef); CGImageRelease(iref); CGDataProviderRelease(provider); return uiimage; //return uiimage; } catch (itk::ExceptionObject & e) { throw(e); } </code></pre>
Tags
<c++><objective-c><ios>
Title
call c++ class within objective c one
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