Shyam Shyam - 2 months ago 29
iOS Question

How to present a viewController using a row in Eureka Forms

As Eureka is used for creating a new record, which includes different datatypes, one being

MediaPicker
, I'm wondering how to present its viewController.

Which row would do the job?
PushRow
or
ButtonRow


Here is my class where I try to create this.

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)
}
}


Below is the error that I face.

Error

Answer

Although, this was a generic question, my requirement was to use a MPMediaPickerController.

Below is my setup.

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)
    }
}

I believe, it isn't hard to tweak it to anyone's personal requirements!

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