Receive delegate method in different class - ios

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)")
}

Answer 1

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