我正在调整一个分叉的 TouchBar 应用程序,它在 Mac TouchBar 上显示小部件,并试图让专辑封面显示在 NowPlaying 小部件上。这就是项目。
目前,我对这段代码有疑问:
- (void)updateInfo
{
MRMediaRemoteGetNowPlayingInfo(dispatch_get_main_queue(),
^(NSDictionary *info)
{
NSString *album = [info objectForKey:kMRMediaRemoteNowPlayingInfoAlbum];
NSString *artist = [info objectForKey:kMRMediaRemoteNowPlayingInfoArtist];
NSString *title = [info objectForKey:kMRMediaRemoteNowPlayingInfoTitle];
NSData *artworkData = [info objectForKey:kMRMediaRemoteNowPlayingInfoArtworkData];
NSImage *albumart = nil;
if (nil != artworkData && ![artworkData isEqual:[NSNull null]])
{
albumart = [[NSImage alloc] initWithData:artworkData];
}
if (nil != albumart)
{
self.appIcon = albumart;
}
if (self.album != album || self.artist != artist || self.title != title || self.albumArt != albumart)
{
self.album = album;
self.artist = artist;
self.title = title;
self.albumArt = albumart;
[[NSNotificationCenter defaultCenter]
postNotificationName:NowPlayingInfoNotification
object:self];
}
});
}
我遇到的主要问题是专辑封面数据仅在歌曲开始后显示大约半秒钟,然后消失。我的理论是 kMRMediaRemoteNowPlayingInfoArtworkData 用于获取艺术品数据是错误的,但我可能是错的。