How Do I Present a Music Library With a View Controller for a MPMediaPickerControllerDelegate using Swift 3 iOS10?

Question

I am trying to follow a recent post on using a MPMediaPickerControllerDelegate to present a music selection list.

The tutorial is found at this URL:

http://www.justindoan.com/tutorials/

I am using this code:

import UIKit
import MediaPlayer

class ViewController: UIViewController, MPMediaPickerControllerDelegate  {

    var mediapicker1: MPMediaPickerController!

    override func viewDidLoad() {
        super.viewDidLoad()


        let mediaPicker: MPMediaPickerController = MPMediaPickerController.self(mediaTypes:MPMediaType.music)
        mediaPicker.allowsPickingMultipleItems = false
        mediapicker1 = mediaPicker
        mediaPicker.delegate = self
        self.presentViewController(mediapicker1, animated: true, completion: nil)
        }
}

However I have found that the:

self.presentViewController(mediapicker1, animated: true, completion: nil)

does not work. Unfortunately, Swift 3's suggested automatic solution does not work either:

self.present(mediapicker1, animated: true, completion: nil)

Furthermore, the iOS 10 Beta Release Notes, found at:

https://www.scribd.com/doc/315770725/IOS-10-Beta-Release-Notes

says on page 10 of 18,

An MPMediaPickerController object may not display as expected.

I have spent a great deal of time looking to solve this issue on my own with no success.

Any suggestions?

Answer 1

Go through the steps:

1. Add 'NSAppleMusicUsageDescription' to your Info.plist for the privacy authority.
2. Make sure your Music app is available in your iPhone. It will not work in the simulator.

Answer 2

As per our discussion over comments, I recently use the MPMediaPickerController in my latest app named playmates. I am sharing the working code with you. I have written the self-explanatory code.

import MediaPlayer

class viewControllerName: UIViewController,MPMediaPickerControllerDelegate {

//Below is Inaction for picking music from media library
    @IBAction func btnMediaPickerAction(_ sender: UIButton) {        
            let mediaPicker: MPMediaPickerController = MPMediaPickerController.self(mediaTypes:MPMediaType.music)
            mediaPicker.delegate = self
            mediaPicker.allowsPickingMultipleItems = false
            self.present(mediaPicker, animated: true, completion: nil)
        }

// MPMediaPickerController Delegate methods
    func mediaPickerDidCancel(_ mediaPicker: MPMediaPickerController) {
            self.dismiss(animated: true, completion: nil)
        }

        func mediaPicker(_ mediaPicker: MPMediaPickerController, didPickMediaItems mediaItemCollection: MPMediaItemCollection) {
            self.dismiss(animated: true, completion: nil)
            print("you picked: \(mediaItemCollection)")//This is the picked media item. 
//  If you allow picking multiple media, then mediaItemCollection.items will return array of picked media items(MPMediaItem)
            }
}

I found below discripencies in your code:

• use self.present not self.presentViewController
• No need to create global instance of mediaPicker. As in the delegate method you are getting the instance of MPMediaPickerController