Jak wyświetlić viewController za pomocą wiersza w formularzach Eureka

Question

Ponieważ Eureka służy do tworzenia nowego rekordu, który zawiera różne typy danych, z których jeden to MediaPicker, zastanawiam się, jak zaprezentować jego viewController.

Który wiersz wykona zadanie? PushRow lub ButtonRow

Oto moja klasa, gdzie staram się stworzyć to.

import UIKit 
import MediaPlayer 

import Eureka 

public final class MusicRow<T: Equatable> : SelectorRow<T, PushSelectorCell<T>, SelectorViewController<T>>, RowType { 

    public required init(tag: String?) { 
     super.init(tag: tag) 
     presentationMode = .Show(controllerProvider: ControllerProvider.Callback { 
      return AddMusicViewController(){ _ in } 
      }, completionCallback: { vc in 
       vc.navigationController?.popViewControllerAnimated(true) 
     }) 
    } 
} 

public class AddMusicViewController: MPMediaPickerController, MPMediaPickerControllerDelegate { 

    var musicPicker: MPMediaPickerController! 

    public var row: RowOf<MPMediaItemCollection>! 

    public var completionCallback : ((UIViewController) ->())? 

    public override func viewDidLoad() { 
     super.viewDidLoad() 
     // Do any additional setup after loading the view. 
     // Setup sections/rows for tableView 
     addMusic() 
    } 

    // Initialize musicPicker and customize it 
    func addMusic() { 
     musicPicker = MPMediaPickerController.self(mediaTypes:.Music) 
     musicPicker.delegate = self 
     musicPicker.allowsPickingMultipleItems = true 
     view.addSubview(musicPicker.view) 
    } 

    // After selection, store the data into an array 
    public func mediaPicker(mediaPicker: MPMediaPickerController, didPickMediaItems mediaItemCollection: MPMediaItemCollection) { 
     musicTemp = nil 
     musicTemp = mediaItemCollection 
     if musicTemp == nil { 
      noMusic = true 
     } else { 
      noMusic = false 
     } 
     completionCallback?(self) 
    } 

    // Cancel mediaPickerController 
    public func mediaPickerDidCancel(mediaPicker: MPMediaPickerController){ 
     // Dismiss the picker if the user canceled 
     noMusic = true 
     completionCallback?(self) 
    } 
} 

Poniżej znajduje się błąd, z którym się spotykam.

Answer 1

Mimo, że był to pytanie ogólne, mój wymogiem było użycie MPMediaPickerController.

Poniżej znajduje się moja konfiguracja.

import UIKit 
import MediaPlayer 

import Eureka 

// MusicRow 
public final class MusicRow : SelectorRow<MPMediaItemCollection, PushSelectorCell<MPMediaItemCollection>, AddMusicViewController>, RowType { 
    public required init(tag: String?) { 
     super.init(tag: tag) 
     presentationMode = .Show(controllerProvider: ControllerProvider.Callback { return AddMusicViewController(){ _ in } }, completionCallback: { vc in vc.navigationController?.popViewControllerAnimated(true) }) 
displayValueFor = { 
     guard var musicTitle = $0 else { return "" } 
     musicTitle = musicTemp! 
     let representativeItem = musicTitle.representativeItem 
     print("representativeItem = \(representativeItem)") 
     let representativeItemTitle = representativeItem?.title 
     return "\(representativeItemTitle)" 
     } 
    } 
} 

// MusicViewController 
public class AddMusicViewController : UIViewController, TypedRowControllerType, MPMediaPickerControllerDelegate { 

    public var row: RowOf<MPMediaItemCollection>! 
    public var completionCallback : ((UIViewController) ->())? 

    lazy var musicPicker : MPMediaPickerController = { [unowned self] in 
     let mediaPicker = MPMediaPickerController.self(mediaTypes:.Music) 
     return mediaPicker 
    }() 

    required public init?(coder aDecoder: NSCoder) { 
     super.init(coder: aDecoder) 
    } 

    public override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: NSBundle?) { 
     super.init(nibName: nil, bundle: nil) 
    } 

    convenience public init(_ callback: (UIViewController) ->()){ 
     self.init(nibName: nil, bundle: nil) 
     completionCallback = callback 
    } 

    public override func viewDidLoad() { 
     super.viewDidLoad() 
     view.addSubview(musicPicker.view) 

     musicPicker.delegate = self 
     musicPicker.allowsPickingMultipleItems = true 

     self.navigationItem.leftBarButtonItem = UIBarButtonItem(title: "", style: .Plain, target: nil, action: nil) 
    } 

    // After selection, store the data into a temporary variable 
    public func mediaPicker(mediaPicker: MPMediaPickerController, didPickMediaItems mediaItemCollection: MPMediaItemCollection) { 
     musicTemp = nil 
     musicTemp = mediaItemCollection 
     if musicTemp == nil { 
      noMusic = true 
     } else { 
      noMusic = false 
      row.value? = musicTemp! 
     } 
     completionCallback?(self) 
    } 

    // Cancel mediaPickerController 
    public func mediaPickerDidCancel(mediaPicker: MPMediaPickerController){ 
     // Dismiss the picker if the user canceled 
     noMusic = true 
     completionCallback?(self) 
    } 
} 

Uważam, że nie jest trudno dostosować go do osobistych wymagań!