如何使用Eureka Forms中的行呈现viewController [英] How to present a viewController using a row in Eureka Forms

问题描述

由于Eureka用于创建包含不同数据类型的新记录，其中一个是 MediaPicker ，我想知道如何呈现其viewController。

哪一排可以完成这项工作？ PushRow 或 ButtonRow

这是我的班级我在哪里尝试创建这个。

  import UIKit 
 import MediaPlayer 
 
 import Eureka 
 
公共决赛班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） 
}）
} 
} 
 
公共类AddMusicViewController：MPMediaPickerController，MPMediaPickerControllerDelegate {
 
 var musicPicker：MPMediaPickerController！ 
 
 public var row：RowOf< MPMediaItemCollection>！ 
 
 public var completionCallback：（（UIViewController） - >（））？ 
 
 public override func viewDidLoad（）{
 super.viewDidLoad（）
 //加载视图后进行任何其他设置。 
 //为tableView设置部分/行
 addMusic（）
} 
 
 //初始化musicPicker并自定义它
 func addMusic（）{
 musicPicker = MPMediaPickerController.self（mediaTypes：.Music）
 musicPicker.delegate = self 
 musicPicker.allowsPickingMultipleItems = true 
 view.addSubview（musicPicker.view）
} 
 
 //选择后，将数据存储到数组
 public func mediaPicker（mediaPicker：MPMediaPickerController，didPickMediaItems mediaItemCollection：MPMediaItemCollection）{
 musicTemp = nil 
 musicTemp = mediaItemCollection 
如果musicTemp == nil {
 noMusic = true 
} else {
 noMusic = false 
} 
 completionCallback？（self）
} 
 
 //取消mediaPickerController 
 public func mediaPickerDidCancel（mediaPicker：MPMediaPickerController）{
 //如果用户取消了
，则取消选择器noMusic = true 
 completionCallback？（self）
} 
} 
  

以下是我所面临的错误。

解决方案

虽然这是一个通用的问题，但我的要求是使用 MPMediaPickerController 。 / p>

以下是我的设置。

  import UIKit 
 import MediaPlayer 
 
导入Eureka 
 
 // MusicRow 
公共最终类MusicRow：SelectorRow< MPMediaItemCollection，PushSelectorCell< MPMediaItemCollection> ;, AddMusicViewController> ;, RowType {
 public required init（tag：String？）{
 super.init（tag：tag）
 presentationMode = .Show（controllerProvider：ControllerProvider.Callback {return AddMusicViewContro ller（）{_ 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 
公共类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 
}（）
 
必需public init？（编码器aDecoder：NSCoder）{
 super.init（编码器：aDecoder）
} 
 
公共覆盖init（nibName nibNameOrNil： String？，bundle nibBundleOrNil：NSBundle？）{
 super.init（nibName：nil，bundle：nil）
} 
 
方便公共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：，st yle：.Plain，target：nil，action：nil）
} 
 
 //选择后，将数据存储到临时变量
 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）
} 
 
 //取消mediaPickerController 
 public func mediaPickerDidCancel（mediaPicker：MPMediaPickerController）{
 //如果用户取消了
，则取消选择器noMusic = true 
 completionCallback？（self）
} 
} 
  

我相信，根据任何人的个人要求调整它并不困难！

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.

解决方案

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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