Spotify iOS SDK连接到具有现有访问令牌的Spotify应用程序远程

问题描述

我正在制作一个带有抖动的应用程序，我想在给定uri的情况下使用Spotify播放歌曲。我已经在dart代码中使用Spotify Web API实现了身份验证，因此我已经有一个有效的访问令牌。我需要使用iOS SDK来播放带有uri的曲目，因此需要迅速实现。我要做的是将访问令牌传递给swift代码，并将Spotify应用程序远程对象与访问令牌连接，然后跳过spotify iOS sdk quick start guide上“设置用户授权”部分下的身份验证步骤。这是我完整的AppDelegate.swift代码

import UIKit
import Flutter
import Firebase

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate,SPTAppRemoteDelegate,SPTAppRemotePlayerStateDelegate  {
    
    let SpotifyClientID = client id
    let SpotifyRedirectURL = redirect uri
    
    lazy var configuration = SPTConfiguration(
      clientID: SpotifyClientID,redirectURL: SpotifyRedirectURL
    )
 
    
    private let spotifyMethodChannelName = "spotify"
    private var spotifyAppRemote: SPTAppRemote? = nil
    private var result: FlutterResult? = nil
    
    func appRemoteDidEstablishConnection(_ appRemote: SPTAppRemote) {
      print("connected")
        self.result!("success")
    }
    
    func appRemote(_ appRemote: SPTAppRemote,didDisconnectWithError error: Error?) {
      print("disconnected")
    }
    
    func appRemote(_ appRemote: SPTAppRemote,didFailConnectionAttemptWithError error: Error?) {
        print("failed " + error.debugDescription)
    }
    
    func playerStateDidChange(_ playerState: SPTAppRemotePlayerState) {
      print("player state changed")
    }
    
  override func application(
    _ application: UIApplication,didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
//    FirebaseApp.configure()
    
    let controller : FlutterViewController = window?.rootViewController as! FlutterViewController
    let spotifyChannel = FlutterMethodChannel(name: spotifyMethodChannelName,binaryMessenger: controller.binaryMessenger)
    spotifyChannel.setMethodCallHandler({
      (call: FlutterMethodCall,result: @escaping FlutterResult) -> Void in
      // Note: this method is invoked on the UI thread.
        self.result = result
        switch(call.method){
        case "connect":
            let args: Dictionary<String,AnyObject> = (call.arguments as? Dictionary<String,AnyObject>)!
            self.connect(accessToken: args["accessToken"] as! String)
        case "playTrack":
            let args: Dictionary<String,AnyObject>)!
            self.playTrack(uri: args["uri"] as! String)
        default:
            result(FlutterError(code: "METHOD CALL DOESN'T EXIST",message: "Method call doesn't exist",details: nil))
        }
    })
    
    
    GeneratedPluginRegistrant.register(with: self)
    return super.application(application,didFinishLaunchingWithOptions: launchOptions)
  }
    
    private func connect(accessToken: String) -> Void{
        print(accessToken)
        spotifyAppRemote = SPTAppRemote(configuration: self.configuration,logLevel: .debug)
        spotifyAppRemote!.connectionParameters.accessToken = accessToken
        spotifyAppRemote!.delegate = self
        spotifyAppRemote!.connect()
        
    }
    
    
    private func playTrack(uri: String) -> Void{
        self.spotifyAppRemote?.playerAPI?.play(uri,asRadio: false,callback: {peram1,peram2 in})
        self.result!("success")
    }
}

尽管相关的部分是此连接功能

    private func connect(accessToken: String) -> Void{
        print(accessToken)
        spotifyAppRemote = SPTAppRemote(configuration: self.configuration,logLevel: .debug)
        spotifyAppRemote!.connectionParameters.accessToken = accessToken
        spotifyAppRemote!.delegate = self
        spotifyAppRemote!.connect()
        
    }

如果Spotify应用当前在后台播放音乐，则此代码将成功连接到Spotify应用，但否则将无法连接（即使Spotify在后台打开但未播放音乐）。快速入门指南使用一种称为authorizeAndPlayUri的方法播放曲目，但是由于我已经具有有效的访问令牌，因此我不想进行授权。即使未在后台使用访问令牌打开Spotify应用，我该如何连接呢？这也是我第一次使用iOS本机代码，因此肯定有可能犯了一个与我无关的迅速相关错误。

解决方法

您可以尝试包含道具 { playURI：“”， } 在您的配置中

来源：https://github.com/cjam/react-native-spotify-remote/issues/75

,

好吧，根据官方 Spotify sdk 文档，我们很不走运。如果 Spotify 应用当前未运行，您需要使用 authorizeAndPlayURI 来唤醒它。

https://spotify.github.io/ios-sdk/html/Classes/SPTAppRemote.html#//api/name/connect

编辑： 您可以使用 checkIfSpotifyAppIsActive 来检查 Spotify 应用当前是否在后台处于活动状态，决定是简单地连接它还是使用 authorizeAnPlayURI 来唤醒应用。

https://spotify.github.io/ios-sdk/html/Classes/SPTAppRemote.html#//api/name/checkIfSpotifyAppIsActive：

事先获取访问令牌的好处是，如果 Spotify 应用程序恰好正在运行，则不会有任何应用程序切换，事情会更顺畅。否则，应用切换并继续。