Receive delegate method in different class

Question

I'm developing a music player by using Jukebox library. It has a delegation which warn elements when songs duration/ current time etc. changed. In Jukebox example, all of codes are in ViewController. Therefore, for example when current time changes, it also changes sliders value. I want to create a player class which is usable by more than one ViewController. When I put delegate methods inside this model class. How can I reach them in ViewController classes?

First Screenshot is first ViewController which has delegates methods and initialize player.

MainViewController I need to reach that delegate methods in secondViewController to update the UI.

class ViewController: UIViewController, JukeboxDelegate {

var jukebox : Jukebox!

override func viewDidLoad() {
    super.viewDidLoad()
    configureUI()

    // begin receiving remote events
    UIApplication.shared.beginReceivingRemoteControlEvents()

    // configure jukebox
    jukebox = Jukebox(delegate: self, items: [
        JukeboxItem(URL: URL(string: "http://www.kissfm.ro/listen.pls")!),
        JukeboxItem(URL: URL(string: "http://www.noiseaddicts.com/samples_1w72b820/2514.mp3")!),
        JukeboxItem(URL: URL(string: "http://www.noiseaddicts.com/samples_1w72b820/2958.mp3")!)
        ])!
}
// MARK:- JukeboxDelegate -

func jukeboxDidLoadItem(_ jukebox: Jukebox, item: JukeboxItem) {
    print("Jukebox did load: \(item.URL.lastPathComponent)")
}

func jukeboxPlaybackProgressDidChange(_ jukebox: Jukebox) {

    if let currentTime = jukebox.currentItem?.currentTime, let duration = jukebox.currentItem?.meta.duration {
        let value = Float(currentTime / duration)
        slider.value = value
        populateLabelWithTime(currentTimeLabel, time: currentTime)
        populateLabelWithTime(durationLabel, time: duration)
    } else {
        resetUI()
    }
}

func jukeboxStateDidChange(_ jukebox: Jukebox) {

    UIView.animate(withDuration: 0.3, animations: { () -> Void in
        self.indicator.alpha = jukebox.state == .loading ? 1 : 0
        self.playPauseButton.alpha = jukebox.state == .loading ? 0 : 1
        self.playPauseButton.isEnabled = jukebox.state == .loading ? false : true
    })

    if jukebox.state == .ready {
        playPauseButton.setImage(UIImage(named: "playBtn"), for: UIControlState())
    } else if jukebox.state == .loading  {
        playPauseButton.setImage(UIImage(named: "pauseBtn"), for: UIControlState())
    } else {
        volumeSlider.value = jukebox.volume
        let imageName: String
        switch jukebox.state {
        case .playing, .loading:
            imageName = "pauseBtn"
        case .paused, .failed, .ready:
            imageName = "playBtn"
        }
        playPauseButton.setImage(UIImage(named: imageName), for: UIControlState())
    }

    print("Jukebox state changed to \(jukebox.state)")
}

func jukeboxDidUpdateMetadata(_ jukebox: Jukebox, forItem: JukeboxItem) {
    print("Item updated:\n\(forItem)")
}

See [this](https://stackoverflow.com/questions/6168919/how-do-i-set-up-a-simple-delegate-to-communicate-between-two-view-controllers) example delegate implementation. — Akhilrajtr, Aug 03 '17 at 11:13
This is not I'm looking. In my example, when songs current time changes delegate method is calling everytime. I need to have that method in secondviewcontroler — eonr, Aug 03 '17 at 11:17

score 2 · Answer 1 · edited Sep 05 '17 at 12:02

2

If you want to use music playerview from anywhere

you should write player class all code for playing files should be in this and just need to pass array of list from anywhere and it can played.and use custom delegation for appropriate response in playerview
for UI make a viewcontroller and u can show it from any class so you can call from anywhere in the app

edited Sep 05 '17 at 12:02

Donald Duck

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answered Aug 03 '17 at 11:23

Ramesh.G

359
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10

I edited the question. I need to reach that delegate methods in secondviewcontroller also. How can I do that? – eonr Aug 03 '17 at 11:32
@eonr why u need all the delegate methods in second viewcontroller? again is this not the music Playerview? – Ramesh.G Aug 03 '17 at 11:35
Because there is a slider in secondViewController which shows current time. How can I update that without delegate methods? – eonr Aug 03 '17 at 11:36

Receive delegate method in different class

1 Answers1