从 firebase 存储获取 URL 并将其设置为 AVAudioPlayer 总是会抛出错误 (swift xcode)

Question

我正在尝试从 Firebase 存储下载 URL 并将其保存到 AVAudioPlayer

func loadAudio(post: CompPost, completion: @escaping (AVAudioPlayer) -> ())
    {
        let audioRef = Storage.storage().reference().child("cPosts").child(post.uid).child("Audio").child(post.mp3)
        audioRef.downloadURL
        { (url, error) in
            print("mp3filename: " + post.mp3)
            guard error == nil else
            {
                print(error!.localizedDescription)
                return /**alert**/ }
            let audioURL = url
            print("url:" + audioURL!.absoluteString)
            do
            {
                try self.audioPlayer = AVAudioPlayer(contentsOf: audioURL!)
                completion(self.audioPlayer)
                print("THIS HAS LOADED")
            }
            catch
            {
                print("COULD NOT ASSIGN URL") /**alert**/
                //ERROR here that keeps on happening :(
            }
        }
    }

我知道它是存储中的正确文件，并且由于要检查我的打印语句而获取 url 没有错误，但是，由于某种原因，设置此 URL到我的AVAudioPlayer的内容，audioPlayer

Answer 1

而不是：

try self.audioPlayer = AVAudioPlayer(contentsOf: audioURL!)

尝试使用这个（注意尝试位置）：

 do {
    self.audioPlayer = try AVAudioPlayer(contentsOf: audioURL!)
    completion(self.audioPlayer)
} catch {
    print("===> " + error.localizedDescription)
}

您当然也可以使用 AVPlayer（没有 do/catch）

Answer 2

@jnpdx 的意思（我认为是）- 这样您就可以让 iOS 直接从远程 URL 流式传输，而无需自己处理文件下载

func loadAudio(post: CompPost, completion: @escaping (AVAudioPlayer) -> ())
{
    let audioRef = Storage.storage().reference().child("cPosts").child(post.uid).child("Audio").child(post.mp3)
    audioRef.downloadURL
    { (url, error) in
        print("mp3filename: " + post.mp3)
        guard error == nil else
        {
            print(error!.localizedDescription)
            return /**alert**/ }
        let audioURL = url
        print("url:" + audioURL!.absoluteString)
        do
        {
            **try self.audioPlayer = AVPlayer(url: audioURL!)**
            completion(self.audioPlayer)
            print("THIS HAS LOADED")
        }
        catch
        {
            print("COULD NOT ASSIGN URL - Error = /(error)") /**alert**/
            //ERROR here that keeps on happening :(
        }
    }
}

从 firebase 存储获取 URL 并将其设置为 AVAudioPlayer 总是会抛出错误 (swift xcode)

Getting URL from firebase storage and setting it to an AVAudioPlayer always throws error (swift xcode)

swift

xcode

url

firebase-storage

avaudioplayer