无法使用kMRMediaRemoteNowPlayingInfoArtworkData在Objective C中从Spo

Question

我正在调整一个分叉的TouchBar应用程序，该应用程序在Mac TouchBar上显示小部件，并试图在NowPlaying小部件上显示相册艺术。这就是项目。

目前，我对这段代码有问题：

- (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，专辑艺术数据只在歌曲开始后的半秒左右出现，然后就消失了。我的理论是，kMRMediaRemoteNowPlayingInfoArtworkData用于获取艺术品数据是错误的，但我可能错了。

Answer 1

发现Spotify和Music在从通知中心提取时不会立即更新专辑艺术数据。解决方案是增加大约50ms的延迟。