MPRemoteCommandCenter - Show Now Playing info

Question

Created Sep ’21

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I'm parsing some data from my API and I would like to show artist and title in title section of MPMediaItemPropertyTitle and the album art. Right now I can print a string, as you can spot in the code below, but I would like to print the API data, as I'm doing it in the labels. Thank you in advance for your help. Here is my code:

import UIKit
import AVKit
import MediaPlayer


class ViewController: UIViewController, AVAudioPlayerDelegate {

 var player : AVPlayer!
 var dict = NSDictionary()

 @IBOutlet weak var artist: UILabel!
 @IBOutlet weak var songtitle: UILabel!
 @IBOutlet weak var artUrl: UIImageView!


override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        overrideUserInterfaceStyle = .light
        setupRemoteTransportControls()
        requestNowPlaying()
        setupNowPlaying()
        addInterruptionsObserver()
    }


[...]
//There is parsing section [...]
     DispatchQueue.main.async {
                    self.songtitle.text = radio.nowPlaying.song.title
                    self.artist.text = radio.nowPlaying.song.artist
                    self.playlist.text = radio.nowPlaying.playlist
                    //albumcover art section
                    if let artUrl = URL(string: radio.nowPlaying.song.art),
                       artUrl != self.songArtUrl {
                        //Loading image from `artUrl`
                        let imageDatatask = session.dataTask(with: artUrl) { imageData, imageResponse, imageError in
                            if let imageError = imageError {
                                print(imageError)
                                return
                            }
                            guard let imageData = imageData else {
                                print("image_data is nil")
                                return
                            }
                            DispatchQueue.main.async {
                                self.songArtUrl = artUrl
                                let albumArt = UIImage(data: imageData)
                                self.artUrl.image = albumArt
              
                                
                            }
                        }
                        imageDatatask.resume()
                    }

[...]
//here is some code with adding remote controls
[...]
func setupNowPlaying() {
        // Define Now Playing Info
        var nowPlayingInfo = [String : Any]()
        nowPlayingInfo[MPMediaItemPropertyTitle] = "Here I would like to print artist + title"
        nowPlayingInfo[MPMediaItemPropertyArtist] = "My name as string - nothing to change"

        if let image = UIImage(named: "Deault_albumart") { //Here I would like to add image from API
            nowPlayingInfo[MPMediaItemPropertyArtwork] = MPMediaItemArtwork(boundsSize: image.size) { size in
                return image
            }
        }
        nowPlayingInfo[MPNowPlayingInfoPropertyIsLiveStream] = true
        MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo
    }

Boost

Answer 1

OOPer OP

Sep ’21

I have not played with MPNowPlayingInfoCenter, but you should better try doing it in the completion handler of the API call:

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        overrideUserInterfaceStyle = .light
        setupRemoteTransportControls()
        requestNowPlaying()
        //setupNowPlaying()
        addInterruptionsObserver()
    }

    //...
                            DispatchQueue.main.async {
                                self.songArtUrl = artUrl
                                let albumArt = UIImage(data: imageData)
                                self.artUrl.image = albumArt //Why don't you rename this, `artUrl` is not of type `URL`, very confusing...
                                
                                self.setupNowPlaying(
                                    artist: radio.nowPlaying.song.artist,
                                    title: radio.nowPlaying.song.title,
                                    artwork: albumArt) //<-
                            }
    //...
    
    func setupNowPlaying(artist: String, title: String, artwork: UIImage?) {
        // Define Now Playing Info
        var nowPlayingInfo = [String : Any]()
        nowPlayingInfo[MPMediaItemPropertyTitle] = "\(artist) - \(title)" //<-
        nowPlayingInfo[MPMediaItemPropertyArtist] = "My name as string - nothing to change"
        
        if let image = artwork ?? UIImage(named: "Deault_albumart") { //<-
            nowPlayingInfo[MPMediaItemPropertyArtwork] = MPMediaItemArtwork(boundsSize: image.size) { size in
                return image
            }
        }
        nowPlayingInfo[MPNowPlayingInfoPropertyIsLiveStream] = true
        MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo
    }

1