我一直在尝试弄清楚如何使用脚本桥获取当前正在播放的歌曲的 iTunes 插图。我已经达到了对某些歌曲有效的地步，但对于其他歌曲，我得到了 SIGABRT。我不确定问题是什么，因此我们将不胜感激。这是我到目前为止所拥有的：
iTunesApplication * iTunes = [SBApplication applicationWithBundleIdentifier:@"com.apple.iTunes"];
NSImage *songArtwork;
iTunesTrack *current = [iTunes currentTrack];
iTunesArtwork *artwork = (iTunesArtwork *)[[[current artworks] get] lastObject];
if(artwork != nil)
songArtwork = [artwork data];
else
songArtwork = [NSImage imageNamed:@"Image.tiff"];
NSMenuItem *artworkMenuItem = [[NSMenuItem alloc] initWithTitle:@"" action:NULL keyEquivalent:@""];
[songArtwork setSize:NSMakeSize(128, 128)];
[artworkMenuItem setImage:songArtwork];
[Menu insertItem:artworkMenuItem atIndex:0];
对于某些歌曲，它可以正常工作，并在菜单项中很好地显示插图，但对于其他歌曲，我会收到 SIGABRT：
[songArtwork setSize:NSMakeSize(128, 128)];
控制台输出如下：
2011-08-12 23:13:20.094 SongViewer[2146:707] -[NSAppleEventDescriptor setSize:]: unrecognized selector sent to instance 0x102827f70
2011-08-12 23:13:20.095 SongViewer[2146:707] An uncaught exception was raised
2011-08-12 23:13:20.096 SongViewer[2146:707] -[NSAppleEventDescriptor setSize:]: unrecognized selector sent to instance 0x102827f70
2011-08-12 23:13:20.097 SongViewer[2146:707] (
0 CoreFoundation 0x00007fff86f11986 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff8b04cd5e objc_exception_throw + 43
2 CoreFoundation 0x00007fff86f9d5ae -[NSObject doesNotRecognizeSelector:] + 190
3 CoreFoundation 0x00007fff86efe803 ___forwarding___ + 371
4 CoreFoundation 0x00007fff86efe618 _CF_forwarding_prep_0 + 232
5 SongViewer 0x0000000100002a83 -[IPMenulet awakeFromNib] + 4483
6 CoreFoundation 0x00007fff86f089e1 -[NSObject performSelector:] + 49
7 CoreFoundation 0x00007fff86f08962 -[NSSet makeObjectsPerformSelector:] + 274
8 AppKit 0x00007fff8d9d9c27 -[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:] + 1245
9 AppKit 0x00007fff8d9d01b9 loadNib + 322
10 AppKit 0x00007fff8d9cf6b6 +[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone:ownerBundle:] + 217
11 AppKit 0x00007fff8d9cf5d1 +[NSBundle(NSNibLoading) loadNibFile:externalNameTable:withZone:] + 141
12 AppKit 0x00007fff8d9cf514 +[NSBundle(NSNibLoading) loadNibNamed:owner:] + 364
13 AppKit 0x00007fff8dc42355 NSApplicationMain + 398
14 SongViewer 0x0000000100001882 main + 34
15 SongViewer 0x0000000100001854 start + 52
)
2011-08-12 23:13:20.098 SongViewer[2146:707] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSAppleEventDescriptor setSize:]: unrecognized selector sent to instance 0x102827f70'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff86f11986 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff8b04cd5e objc_exception_throw + 43
2 CoreFoundation 0x00007fff86f9d5ae -[NSObject doesNotRecognizeSelector:] + 190
3 CoreFoundation 0x00007fff86efe803 ___forwarding___ + 371
4 CoreFoundation 0x00007fff86efe618 _CF_forwarding_prep_0 + 232
5 SongViewer 0x0000000100002a83 -[IPMenulet awakeFromNib] + 4483
6 CoreFoundation 0x00007fff86f089e1 -[NSObject performSelector:] + 49
7 CoreFoundation 0x00007fff86f08962 -[NSSet makeObjectsPerformSelector:] + 274
8 AppKit 0x00007fff8d9d9c27 -[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:] + 1245
9 AppKit 0x00007fff8d9d01b9 loadNib + 322
10 AppKit 0x00007fff8d9cf6b6 +[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone:ownerBundle:] + 217
11 AppKit 0x00007fff8d9cf5d1 +[NSBundle(NSNibLoading) loadNibFile:externalNameTable:withZone:] + 141
12 AppKit 0x00007fff8d9cf514 +[NSBundle(NSNibLoading) loadNibNamed:owner:] + 364
13 AppKit 0x00007fff8dc42355 NSApplicationMain + 398
14 SongViewer 0x0000000100001882 main + 34
15 SongViewer 0x0000000100001854 start + 52
)
terminate called throwing an exception(gdb)
如果有人知道可能出了什么问题，请告诉我！
好吧，我想通了。解决方案是使用API提供的NSData原始数据而不是NSImage。所以我用了：
NSImage *songArtwork = [[NSImage alloc] initWithData:[artwork rawData]];
而不是
songArtwork = [artwork data];
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