Spotify API 1.0.0獲取給定軌道的播放列表的圖像

Question

我在這里迷失了獲取給定曲目集的播放列表的圖像。

我就是無法正常工作。

這是我的代碼。

我包括兩個播放列表，一個由一組給定的曲目組成，一個實際存在。

第一個我在做什么錯？ 我什至可以正確創建臨時播放列表嗎？

require([
            '$api/models',
            '$views/image#Image',
            '$views/list#List'
        ], function(models, Image, List) {
            'use strict';

            var image, trackUris, tracks = [], customPlaylist, customPlaylistList;

            // list of track uris
            trackUris = [
                'spotify:track:0jakfggA0WkYpkAXni6pts',
                'spotify:track:2g1EMRbn6So6zGTdwNyySf',
                'spotify:track:4kNfh9In8hjuuERSZhwTTx',
                'spotify:track:1JHUxxd77M4ViaqJZfBdl0',
                'spotify:track:6x3db7BbBjDYZH2ZAcvYyC',
                'spotify:track:6czyeVTQtHYPnZgXE6op0I',
                'spotify:track:51Vyh1xfCD27SneoG7NAhb'
            ];

            // get track objects from uris
            for (var i = 0; i < trackUris.length; i++) {
                tracks.push(models.Track.fromURI(trackUris[i]));
            }

            // create temporary playlist
            var title = 'tmp_' + Date.now();
            var tmp = models.Playlist.createTemporary(title).done(function(playlist){

                // get tracks collection and add tracks to it
                playlist.load(['tracks']).done(function(){
                    for (var i = 0; i < tracks.length; i++) {
                        playlist.tracks.add(tracks[i]);
                    }
                });
                customPlaylist = playlist;

            }).fail(function() {
                console.log("Failed");
            });

            // create image of playlist
            image = Image.forPlaylist(customPlaylist, {width: 200, height: 200, player: true});
            document.getElementById('customPlaylistCover').appendChild(image.node);

            // create a list view for the playlist
            customPlaylistList = List.forPlaylist(customPlaylist);
            document.getElementById('customPlaylistList').appendChild(customPlaylistList.node);
            customPlaylistList.init();

            // get all the above for an existing playlist
            var playlist = models.Playlist.fromURI('spotify:user:116690321:playlist:6l3dvYJaGrX5mqkNntbyLx');
            image = Image.forPlaylist(playlist, {width: 200, height: 200, player: true});
            document.getElementById('playlistCover').appendChild(image.node);

            var playlistList = List.forPlaylist(playlist);
            document.getElementById('playlistList').appendChild(playlistList.node);
            playlistList.init();

        });

Answer 1

您在這里沒有做錯任何事情。 當前，顯示的是占位符圖像，而不是臨時播放列表的拼接圖。

調試代碼（如果未縮小，則會有所幫助），將向您顯示占位符圖像（帶有注釋的灰色背景）被設置為節點的圖像，但保持隱藏狀態，直到超過時間限制（不到半秒）。 在此期間，正在加載播放列表中的image屬性。 如果成功加載圖像，則在未超過時間限制的情況下，占位符將被替換或完全不顯示。 下面的代碼嘗試從臨時播放列表加載image屬性，但失敗，因此顯示占位符。

require(['$api/models', '$views/image#Image'], function(models, Image) {
    models.Playlist.createTemporary("Temporary Playlist").done(function(playlist) {
        playlist.load("tracks").done(function(playlist) {

            // Adding some random tracks to the temporary playlist
            playlist.tracks.add(models.Track.fromURI("spotify:track:2YtDzuAcSVk2j4UFXON5iG"));
            playlist.tracks.add(models.Track.fromURI("spotify:track:6xzCQrXrn0uOOKBQZK1zsF"));
            playlist.tracks.add(models.Track.fromURI("spotify:track:0m1sOrAltrx0oQlqKVUf75"));
            playlist.tracks.add(models.Track.fromURI("spotify:track:40RFNnTV6CAounCsx56TZ2"));

            // Checking if the playlist image can be loaded.
            // This code holds no purpose other than showing that 
            // loading an image from a temporary playlist fails
            playlist.load("image").done(function(playlistWithImage) {
                console.log("Loaded image.");
            }).fail(function(playlistWithImage) {
                console.log("Failed to load image.");
            })

            // Appending the playable node to the body tag
            var image = Image.forPlaylist(playlist, {width: 100, height: 100, player : true });
            document.body.appendChild(image.node);
        });
    });
});

我不知道是否需要修復此問題，但事實就是這樣。