我正在尝试按照教程（link进行操作，我只是将我的应用程序转换为最新的Swift3-Syntax。 不幸的是仍然存在一些错误，我无法修复。 我会很感激任何提示。
错误： Image
我的AppDelegate.swift：
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
let kClientID = "cfa6ab909e8349bcb78d4924e1d7a32c"
let kCallbackURL = "spotifytutorial://returnAfterLogin"
let kTokenSwapURL = "http://localhost:1234/swap"
let kTokenRefreshServiceURL = "http://localhost:1234/refresh"
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
return true
}
func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
if SPTAuth.defaultInstance().canHandle(url, withDeclaredRedirectURL: URL(string: kCallbackURL)) {
SPTAuth.defaultInstance().handleAuthCallback(withTriggeredAuthURL: url, tokenSwapServiceEndpointAt: URL(string: kTokenSwapURL), callback: { (error:NSError!, session:SPTSession!) -> Void in
if error != nil {
print("AUTHENTICATION ERROR")
return
}
let userDefaults = UserDefaults.standard
let sessionData = NSKeyedArchiver.archivedData(withRootObject: session)
userDefaults.set(sessionData, forKey: "SpotifySession")
userDefaults.synchronize()
NotificationCenter.default.post(name: Notification.Name(rawValue: "loginSuccessfull"), object: nil)
})
}
return false
}
func applicationWillResignActive(_ application: UIApplication) {
// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
// Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}
func applicationDidEnterBackground(_ application: UIApplication) {
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}
func applicationWillEnterForeground(_ application: UIApplication) {
// Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}
func applicationDidBecomeActive(_ application: UIApplication) {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}
func applicationWillTerminate(_ application: UIApplication) {
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
}
我的ViewController.swift：
import UIKit
class ViewController: UIViewController, SPTAudioStreamingPlaybackDelegate {
let kClientID = "cfa6ab909e8349bcb78d4924e1d7a32c"
let kCallbackURL = "spotifytutorial://returnAfterLogin"
let kTokenSwapURL = "http://localhost:1234/swap"
let kTokenRefreshServiceURL = "http://localhost:1234/refresh"
var session:SPTSession!
var player:SPTAudioStreamingController?
@IBOutlet weak var artworkImageView: UIImageView!
@IBOutlet weak var loginButton: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
loginButton.isHidden = true
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.updateAfterFirstLogin), name: NSNotification.Name(rawValue: "loginSuccessfull"), object: nil)
let userDefaults = UserDefaults.standard
if let sessionObj:AnyObject = userDefaults.object(forKey: "SpotifySession") as AnyObject? { // session available
let sessionDataObj = sessionObj as! Data
let session = NSKeyedUnarchiver.unarchiveObject(with: sessionDataObj) as! SPTSession
if !session.isValid() {
SPTAuth.defaultInstance().renewSession(session, withServiceEndpointAt: URL(string: kTokenRefreshServiceURL), callback: { (error:NSError!, renewdSession:SPTSession!) -> Void in
if error == nil {
let sessionData = NSKeyedArchiver.archivedDataWithRootObject(session)
userDefaults.setObject(sessionData, forKey: "SpotifySession")
userDefaults.synchronize()
self.session = renewdSession
self.playUsingSession(renewdSession)
}else{
println("error refreshing session")
}
})
}else{
print("session valid")
self.session = session
playUsingSession(session)
}
}else{
loginButton.isHidden = false
}
}
func updateAfterFirstLogin () {
loginButton.isHidden = true
let userDefaults = UserDefaults.standard
if let sessionObj:AnyObject = userDefaults.object(forKey: "SpotifySession") as AnyObject? {
let sessionDataObj = sessionObj as! Data
let firstTimeSession = NSKeyedUnarchiver.unarchiveObject(with: sessionDataObj) as! SPTSession
self.session = firstTimeSession
playUsingSession(firstTimeSession)
}
}
func playUsingSession(_ sessionObj:SPTSession!){
if player == nil {
player = SPTAudioStreamingController(clientId: kClientID)
player?.playbackDelegate = self
}
player?.login(with: sessionObj, callback: { (error:NSError!) -> Void in
if error != nil {
print("Enabling playback got error \(error)")
return
}
/*SPTRequest.requestItemAtURI(NSURL(string: "spotify:album:4L1HDyfdGIkACuygktO7T7"), withSession: sessionObj, callback: { (error:NSError!, albumObj:AnyObject!) -> Void in
if error != nil {
println("Album lookup got error \(error)")
return
}
let album = albumObj as SPTAlbum
self.player?.playTrackProvider(album, callback: nil)
})*/
SPTRequest.performSearch(withQuery: "let it go", queryType: SPTSearchQueryType.queryTypeTrack, offset: 0, session: nil, callback: { (error:NSError!, result:AnyObject!) -> Void in
let trackListPage = result as SPTListPage
let partialTrack = trackListPage.items.first as SPTPartialTrack
SPTRequest.requestItemFromPartialObject(partialTrack, withSession: nil, callback: { (error:NSError!, results:AnyObject!) -> Void in
let track = results as SPTTrack
self.player?.playTrackProvider(track, callback: nil)
})
})
})
}
@IBAction func loginWithSpotify(_ sender: AnyObject) {
let auth = SPTAuth.defaultInstance()
let loginURL = auth?.loginURL(forClientId: kClientID, declaredRedirectURL: URL(string: kCallbackURL), scopes: [SPTAuthStreamingScope])
UIApplication.shared.openURL(loginURL!)
}
func updateCoverArt(){
if player?.currentTrackMetadata == nil {
artworkImageView.image = UIImage()
return
}
let uri = player?.currentTrackMetadata[SPTAudioStreamingMetadataAlbumURI] as! String
SPTAlbum.albumWithURI(URL(string: uri), session: session) { (error:NSError!, albumObj:AnyObject!) -> Void in
let album = albumObj as SPTAlbum
if let imgURL = album.largestCover.imageURL as NSURL! {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), { () -> Void in
var error:NSError? = nil
var coverImage = UIImage()
if let imageData = NSData(contentsOfURL: imgURL, options: nil, error: &error){
if error == nil {
coverImage = UIImage(data: imageData)!
}
}
dispatch_async(dispatch_get_main_queue(), { () -> Void in
self.artworkImageView.image = coverImage
})
})
}
}
}
func audioStreaming(_ audioStreaming: SPTAudioStreamingController!, didStartPlayingTrack trackUri: URL!) {
updateCoverArt()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
答案 0 :(得分：0)
试试这个：
在你的代表身上：
func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
if SPTAuth.defaultInstance().canHandle(url) {
SPTAuth.defaultInstance().handleAuthCallback(withTriggeredAuthURL: url, callback: {
error, session in
if error != nil {
print("AUTHENTICATION ERROR \(error)")
return
}
let userDefaults = UserDefaults.standard
let sessionData = NSKeyedArchiver.archivedData(withRootObject: session)
userDefaults.set(sessionData, forKey: "SpotifySession")
userDefaults.synchronize()
NotificationCenter.default.post(name: Notification.Name(rawValue: "loginSuccessfull"), object: nil)
})
}
return false
}
在控制器上：
func loginWithSpotify(sender: AnyObject) {
let auth = SPTAuth.defaultInstance()!
auth.clientID = clientId
auth.redirectURL = URL(string: kCallbackURL)
auth.tokenRefreshURL = URL(string: kTokenRefreshServiceURL)
auth.tokenSwapURL = URL(string: kTokenSwapURL)
auth.requestedScopes = [SPTAuthPlaylistReadPrivateScope ]
let loginURL = auth.loginURL
UIApplication.shared.openURL(loginURL!)
}