我正在使用Apple Music API最近播放的端点，该端点返回最近播放的媒体资产列表。
然后我使用其中一个，并在MPMusicPlayerController上播放。
{
"id": "1437591818",
"type": "albums",
"href": "/v1/catalog/us/albums/1437591818",
"attributes": {
"artwork": {
"width": 3000,
"height": 3000,
"url": "https://is2-ssl.mzstatic.com/image/thumb/Music118/v4/46/e9/60/46e9606c-59ec-1243-c377-2089c303dacf/00602577153884.rgb.jpg/{w}x{h}bb.jpeg",
"bgColor": "000000",
"textColor1": "faf0ee",
"textColor2": "ecd0d3",
"textColor3": "c8c0be",
"textColor4": "bca6a9"
},
"artistName": "Lil Wayne",
"isSingle": false,
"url": "https://itunes.apple.com/us/album/tha-carter-v/1437591818",
"isComplete": true,
"genreNames": [
"Hip-Hop/Rap",
"Music"
],
"trackCount": 23,
"isMasteredForItunes": true,
"releaseDate": "2018-09-28",
"name": "Tha Carter V",
"recordLabel": "Young Money Records, Inc.",
"copyright": "℗ 2018 Young Money Records, Inc.",
"playParams": {
"id": "1437591818",
"kind": "album"
},
"editorialNotes": {
"standard": "Maybe more than any other rapper in history, Lil Wayne’s output is defined by franchises. An artist should be so lucky to sustain the kind of longevity that would allow for multi-volume phases the likes of Wayne’s <i>Dedication</i>, and <i>Da Drought</i> mixtapes, let alone the series that made him into a superstar, <i>Tha Carter</i>. Though Wayne was not without projects in between, some seven years were allowed to pass between the release of the fourth and fifth installments of the lattermost. Fortunately, Wayne has rewarded his fans’ patience with 23 tracks that speak to a number of his most storied eras.<br />n“Mixtape Weezy,” as Jay-Z famously coined, is alive and well on songs like the Swizz Beatz-produced “Uproar,” Wayne blacking out over a reinterpretation of G-Dep’s 2001 hit “Special Delivery.” The nostalgia doesn’t stop (or peak) there, as Wayne and Snoop Dogg share space over a flip of Dr. Dre’s “Xxplosive” on “Dope N*ggaz,” while Mannie Fresh revisits the Cash Money golden-era bounce of Juvenile’s “Ghetto Children” for “Start This Shit Off Right.” There are nods to the experimental Wayne of the <i>I Am Not A Human Being</i> projects (“Don’t Cry,” “Mess”) and also the rapper’s under-heralded pop wizardry (“Famous,” which features his daughter Reginae as hook singer), and even a love song built on a gospel sample, “Dope New Gospel.” In all, <i>Tha Carter V</i> is an album for anyone who’s missed Wayne—no matter which Wayne they’d missed.",
"short": "Weezy F Baby, and the F is for finally."
},
"contentRating": "explicit"
}
},
每当我想访问当前播放内容的元数据时，我都可以使用nowPlayingItem属性来获取它，该属性返回专辑中当前曲目的MPMediaItem。
此MPMediaItem的艺术作品属性为null，因此我想访问相册的艺术作品。我可以获得专辑PersistentStoreId(例如3911653000682848550(，我正在使用它通过Apple Music API请求专辑信息：
https://api.music.apple.com/v1/catalog/us/albums/3911653000682848550
但这会返回一条"找不到资源"错误消息。
使用搜索终结点(https://api.music.apple.com/v1/catalog/us/search?term=the+carter+v&limit＝2&types=艺术家、专辑(或最近播放的原始端点。我看到在这些端点中返回的专辑ID与我在albumPersistentStoreId属性中获得的不同。如何从MPMediaItem获取正确的相册ID？
您可以使用MPMediaItem的playbackstoreID-从API请求曲目信息并从中获取专辑艺术。