このコードをビルドすると、エラーが発生します。
AVAsset *asset = [AVAsset assetWithURL:ur];
AVAssetImageGenerator *imageGenerator = [[AVAssetImageGenerator alloc]initWithAsset:asset];
CMTime time = CMTimeMake(2, 1);
CGImageRef imageRef = [imageGenerator copyCGImageAtTime:time actualTime:NULL error:NULL];
UIImage *thumbnail = [UIImage imageWithCGImage:imageRef];
cell.imageView.image=thumbnail;
CGImageRelease(imageRef);
エラー
Undefined symbols for architecture i386: "_CGImageRelease", referenced from:
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
追加しましlibc++.dylib
たが、まだエラーが続きます。どうすればこれを解決できますか?