This is the TableViewController with the list of the audios. It successfully grabs all data from firebase and displays in a table. I include a screenshot
import UIKit
import AVKit
import AVFoundation
import FirebaseFirestore
import Combine
import SDWebImage
class ListOfAudioLessonsTableViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
@IBOutlet var table: UITableView!
let placeHolderImage = UIImage(named: "placeHolderImage")
private var viewModel = AudiosViewModel()
private var cancellable: AnyCancellable?
override func viewDidLoad() {
super.viewDidLoad()
self.viewModel.fetchData()
self.title = "Audio Lessons"
table.delegate = self
table.dataSource = self
cancellable = viewModel.$audios.sink { _ in
DispatchQueue.main.async{
self.table.reloadData()
}
} // Do any additional setup after loading the view.
}
// Table
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
print("audios count = ", viewModel.audios.count)
return viewModel.audios.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
let song = viewModel.audios[indexPath.row]
tableView.tableFooterView = UIView()
cell.textLabel?.text = song.albumName
cell.detailTextLabel?.text = song.name
cell.accessoryType = .disclosureIndicator
let imageURL = song.audioImageName
cell.imageView?.sd_imageIndicator = SDWebImageActivityIndicator.gray
cell.imageView?.sd_setImage(with: URL(string: imageURL),
placeholderImage: placeHolderImage,
options: SDWebImageOptions.highPriority,
context: nil,
progress: nil,
completed: { downloadedImage, downloadException, cacheType, downloadURL in
if let downloadException = downloadException {
print("error downloading the image: \(downloadException.localizedDescription)")
} else {
print("successfuly downloaded the image: \(String(describing: downloadURL?.absoluteString))")
}
})
cell.textLabel?.numberOfLines = 0
cell.detailTextLabel?.numberOfLines = 0
let backgroundView = UIView()
backgroundView.backgroundColor = UIColor(named: "AudioLessonsCellHighlighted")
cell.selectedBackgroundView = backgroundView
cell.textLabel?.font = UIFont(name: "Helvetica-Bold", size: 14)
cell.detailTextLabel?.font = UIFont(name: "Helvetica", size: 12)
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 100
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
// present the player
let position = indexPath.row
//lessons
guard let vc = storyboard?.instantiateViewController(identifier: "AudioPlayer") as? AudioPlayerViewController else {
return
}
vc.paragraphs = viewModel.audios
vc.position = position
present(vc, animated: true)
}
func tableView(_ tableView: UITableView, didHighlightRowAt indexPath: IndexPath) {
if let cell = tableView.cellForRow(at: indexPath) {
cell.contentView.backgroundColor = UIColor(named: "AudioLessonsHighlighted")
cell.textLabel?.highlightedTextColor = UIColor(named: "textHighlighted")
cell.detailTextLabel?.highlightedTextColor = UIColor(named: "textHighlighted")
}
}
func tableView(_ tableView: UITableView, didUnhighlightRowAt indexPath: IndexPath) {
if let cell = tableView.cellForRow(at: indexPath) {
cell.contentView.backgroundColor = nil
}
}
}
This is the AudioPlayerViewController. It successfully plays audio from link grabbed from firbase. It shows all the labels but doesn't display the image. The image also should be downloaded from firebase according to the row selected by the user. I succeeded to download and display image in tableviewcontroller but in cannot display AudioPlayerViewController and my question is: How to display image from firebase in AlbumImageview in AudioPlayerViewController? I include a screenshot
import UIKit
import AVFoundation
import MediaPlayer
import AVKit
import Combine
import SDWebImage
class AudioPlayerViewController: UIViewController {
private var viewModel = AudiosViewModel()
public var position: Int = 0
public var paragraphs: [Audio] = []
let placeHolderImage = UIImage(named: "placeHolderImage")
@IBOutlet var holder: UIView!
var player: AVPlayer?
var playerItem: AVPlayerItem?
var isSeekInProgress = false
var chaseTime = CMTime.zero
fileprivate let seekDuration: Float64 = 15
var playerCurrentItemStatus: AVPlayerItem.Status = .unknown
// User Interface elements
private let albumImageView: UIImageView = {
let imageView = UIImageView()
imageView.contentMode = .scaleAspectFill
return imageView
}()
private let paragraphNumberLabel: UILabel = {
let label = UILabel()
label.textAlignment = .left
label.font = .systemFont(ofSize: 16, weight: .light)
label.numberOfLines = 0 // allow line wrap
label.textColor = UIColor(named: "PlayerColors")
return label
}()
private let albumNameLabel: UILabel = {
let label = UILabel()
label.textAlignment = .left
label.font = .systemFont(ofSize: 18, weight: .bold)
label.numberOfLines = 0 // allow line wrap
label.textColor = UIColor(named: "PlayerColors")
return label
}()
private let songNameLabel: UILabel = {
let label = UILabel()
label.textAlignment = .left
label.font = .systemFont(ofSize: 16, weight: .ultraLight)
label.numberOfLines = 0 // allow line wrap
label.textColor = UIColor(named: "PlayerColors")
return label
}()
private let elapsedTimeLabel: UILabel = {
let label = UILabel()
label.textAlignment = .left
label.font = .systemFont(ofSize: 12, weight: .light)
label.textColor = UIColor(named: "PlayerColors")
label.text = "00:00"
label.numberOfLines = 0
return label
}()
private let remainingTimeLabel: UILabel = {
let label = UILabel()
label.textAlignment = .left
label.font = .systemFont(ofSize: 12, weight: .light)
label.textColor = UIColor(named: "PlayerColors")
label.text = "00:00"
label.numberOfLines = 0
return label
}()
private let playbackSlider: UISlider = {
let v = UISlider()
v.addTarget(AudioPlayerViewController.self, action: #selector(progressScrubbed(_:)), for: .valueChanged)
v.minimumTrackTintColor = UIColor.lightGray
v.maximumTrackTintColor = UIColor.darkGray
v.thumbTintColor = UIColor(named: "PlayerColors")
v.minimumValue = 0
v.isContinuous = true
return v
}()
let playPauseButton = UIButton()
override func viewDidLoad() {
super.viewDidLoad()
let panGesture = UIPanGestureRecognizer(target: self, action: #selector(panGesture(gesture:)))
self.playbackSlider.addGestureRecognizer(panGesture)
let audioSession = AVAudioSession.sharedInstance()
do {
try audioSession.setCategory(AVAudioSession.Category.playback)
}
catch{
print(error)
}
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
if holder.subviews.count == 0 {
configure()
}
}
func configure() {
// set up player
let song = paragraphs[position]
let url = URL(string: song.trackURL)
let playerItem: AVPlayerItem = AVPlayerItem(url: url!)
do {
try AVAudioSession.sharedInstance().setMode(.default)
try AVAudioSession.sharedInstance().setActive(true, options: .notifyOthersOnDeactivation)
guard url != nil else {
print("urls string is nil")
return
}
player = AVPlayer(playerItem: playerItem)
let duration : CMTime = playerItem.asset.duration
let seconds : Float64 = CMTimeGetSeconds(duration)
remainingTimeLabel.text = self.stringFromTimeInterval(interval: seconds)
let currentDuration : CMTime = playerItem.currentTime()
let currentSeconds : Float64 = CMTimeGetSeconds(currentDuration)
elapsedTimeLabel.text = self.stringFromTimeInterval(interval: currentSeconds)
playbackSlider.maximumValue = Float(seconds)
player!.addPeriodicTimeObserver(forInterval: CMTimeMakeWithSeconds(1, preferredTimescale: 1), queue: DispatchQueue.main) { (CMTime) -> Void in
if self.player!.currentItem?.status == .readyToPlay {
let time : Float64 = CMTimeGetSeconds(self.player!.currentTime());
self.playbackSlider.value = Float(time)
self.elapsedTimeLabel.text = self.stringFromTimeInterval(interval: time)
}
let playbackLikelyToKeepUp = self.player?.currentItem?.isPlaybackLikelyToKeepUp
if playbackLikelyToKeepUp == false{
print("IsBuffering")
self.playPauseButton.isHidden = true
} else {
// stop the activity indicator
print("Buffering completed")
self.playPauseButton.isHidden = false
}
}
playbackSlider.addTarget(self, action: #selector(AudioPlayerViewController.progressScrubbed(_:)), for: .valueChanged)
self.view.addSubview(playbackSlider)
//subroutine used to keep track of current location of time in audio file
guard let player = player else {
print("player is nil")
return
}
player.play()
}
catch {
print("error accured")
}
// set up user interface elements
//album cover
albumImageView.frame = CGRect(x: 20,
y: 20,
width: holder.frame.size.width - 40,
height: holder.frame.size.width - 40)
albumImageView.image = UIImage(named: song.audioImageName)
holder.addSubview(albumImageView)
//Labels Song name, album, artist
albumNameLabel.frame = CGRect(x: 20,
y: holder.frame.size.height - 300,
width: holder.frame.size.width - 40,
height: 20)
paragraphNumberLabel.frame = CGRect(x: 20,
y: holder.frame.size.height - 280,
width: holder.frame.size.width-40,
height: 20)
songNameLabel.frame = CGRect(x: 20,
y: holder.frame.size.height - 260,
width: holder.frame.size.width-40,
height: 20)
playbackSlider.frame = CGRect(x: 20,
y: holder.frame.size.height - 235,
width: holder.frame.size.width-40,
height: 40)
elapsedTimeLabel.frame = CGRect(x: 25,
y: holder.frame.size.height - 200,
width: holder.frame.size.width-40,
height: 15)
remainingTimeLabel.frame = CGRect(x: holder.frame.size.width-60,
y: holder.frame.size.height - 200,
width: holder.frame.size.width-20,
height: 15)
songNameLabel.text = song.name
albumNameLabel.text = song.albumName
paragraphNumberLabel.text = song.paragraphNumber
holder.addSubview(songNameLabel)
holder.addSubview(albumNameLabel)
holder.addSubview(paragraphNumberLabel)
holder.addSubview(elapsedTimeLabel)
holder.addSubview(remainingTimeLabel)
//Player controls
let nextButton = UIButton()
let backButton = UIButton()
let seekForwardButton = UIButton()
let seekBackwardButton = UIButton()
//frames of buttons
playPauseButton.frame = CGRect(x: (holder.frame.size.width - 40) / 2.0,
y: holder.frame.size.height - 172.5,
width: 40,
height: 40)
nextButton.frame = CGRect(x: holder.frame.size.width - 70,
y: holder.frame.size.height - 162.5,
width: 30,
height: 20)
backButton.frame = CGRect(x: 70 - 30,
y: holder.frame.size.height - 162.5,
width: 30,
height: 20)
seekForwardButton.frame = CGRect(x: holder.frame.size.width - 140,
y: holder.frame.size.height - 167.5,
width: 30,
height: 30)
seekBackwardButton.frame = CGRect(x: 110,
y: holder.frame.size.height - 167.5,
width: 30,
height: 30)
let volumeView = MPVolumeView(frame: CGRect(x: 20,
y: holder.frame.size.height - 80,
width: holder.frame.size.width-40,
height: 30))
holder.addSubview(volumeView)
//actions of buttons
playPauseButton.addTarget(self, action: #selector(didTapPlayPauseButton), for: .touchUpInside)
backButton.addTarget(self, action: #selector(didTapBackButton), for: .touchUpInside)
nextButton.addTarget(self, action: #selector(didTapNextButton), for: .touchUpInside)
seekForwardButton.addTarget(self, action: #selector(seekForwardButtonTapped), for: .touchUpInside)
seekBackwardButton.addTarget(self, action: #selector(seekBackwardButtonTapped), for: .touchUpInside)
//styling of buttons
playPauseButton.setBackgroundImage(UIImage(systemName: "pause.fill"), for: .normal)
nextButton.setBackgroundImage(UIImage(systemName: "forward.fill"), for: .normal)
backButton.setBackgroundImage(UIImage(systemName: "backward.fill"), for: .normal)
seekForwardButton.setBackgroundImage(UIImage(systemName: "goforward.15"), for: .normal)
seekBackwardButton.setBackgroundImage(UIImage(systemName: "gobackward.15"), for: .normal)
playPauseButton.tintColor = UIColor(named: "PlayerColors")
nextButton.tintColor = UIColor(named: "PlayerColors")
backButton.tintColor = UIColor(named: "PlayerColors")
seekForwardButton.tintColor = UIColor(named: "PlayerColors")
seekBackwardButton.tintColor = UIColor(named: "PlayerColors")
holder.addSubview(playPauseButton)
holder.addSubview(nextButton)
holder.addSubview(backButton)
holder.addSubview(seekForwardButton)
holder.addSubview(seekBackwardButton)
}
@objc func panGesture(gesture: UIPanGestureRecognizer) {
let currentPoint = gesture.location(in: playbackSlider)
let percentage = currentPoint.x/playbackSlider.bounds.size.width;
let delta = Float(percentage) * (playbackSlider.maximumValue - playbackSlider.minimumValue)
let value = playbackSlider.minimumValue delta
playbackSlider.setValue(value, animated: true)
}
@objc func progressScrubbed(_ playbackSlider: UISlider!) {
let seconds : Int64 = Int64(playbackSlider.value)
let targetTime:CMTime = CMTimeMake(value: seconds, timescale: 1)
player!.seek(to: targetTime)
if player!.rate == 0
{
player?.play()
}
}
func setupNowPlaying() {
// Define Now Playing Info
var nowPlayingInfo = [String : Any]()
nowPlayingInfo[MPMediaItemPropertyTitle] = "Unstoppable"
if let image = UIImage(named: "artist") {
nowPlayingInfo[MPMediaItemPropertyArtwork] = MPMediaItemArtwork(boundsSize: image.size) { size in
return image
}
}
nowPlayingInfo[MPNowPlayingInfoPropertyElapsedPlaybackTime] = player?.currentTime
nowPlayingInfo[MPMediaItemPropertyPlaybackDuration] = playerItem?.duration
nowPlayingInfo[MPNowPlayingInfoPropertyPlaybackRate] = player?.rate
// Set the metadata
MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo
}
func updateNowPlaying(isPause: Bool) {
// Define Now Playing Info
var nowPlayingInfo = MPNowPlayingInfoCenter.default().nowPlayingInfo!
nowPlayingInfo[MPNowPlayingInfoPropertyElapsedPlaybackTime] = player?.currentTime
nowPlayingInfo[MPNowPlayingInfoPropertyPlaybackRate] = isPause ? 0 : 1
// Set the metadata
MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo
}
func setupNotifications() {
let notificationCenter = NotificationCenter.default
notificationCenter.addObserver(self,
selector: #selector(handleInterruption),
name: AVAudioSession.interruptionNotification,
object: nil)
notificationCenter.addObserver(self,
selector: #selector(handleRouteChange),
name: AVAudioSession.routeChangeNotification,
object: nil)
}
@objc func handleRouteChange(notification: Notification) {
guard let userInfo = notification.userInfo,
let reasonValue = userInfo[AVAudioSessionRouteChangeReasonKey] as? UInt,
let reason = AVAudioSession.RouteChangeReason(rawValue:reasonValue) else {
return
}
switch reason {
case .newDeviceAvailable:
let session = AVAudioSession.sharedInstance()
for output in session.currentRoute.outputs where output.portType == AVAudioSession.Port.headphones {
print("headphones connected")
DispatchQueue.main.sync {
player?.play()
}
break
}
case .oldDeviceUnavailable:
if let previousRoute =
userInfo[AVAudioSessionRouteChangePreviousRouteKey] as? AVAudioSessionRouteDescription {
for output in previousRoute.outputs where output.portType == AVAudioSession.Port.headphones {
print("headphones disconnected")
DispatchQueue.main.sync {
player?.pause()
}
break
}
}
default: ()
}
}
@objc func handleInterruption(notification: Notification) {
guard let userInfo = notification.userInfo,
let typeValue = userInfo[AVAudioSessionInterruptionTypeKey] as? UInt,
let type = AVAudioSession.InterruptionType(rawValue: typeValue) else {
return
}
if type == .began {
print("Interruption began")
// Interruption began, take appropriate actions
}
else if type == .ended {
if let optionsValue = userInfo[AVAudioSessionInterruptionOptionKey] as? UInt {
let options = AVAudioSession.InterruptionOptions(rawValue: optionsValue)
if options.contains(.shouldResume) {
// Interruption Ended - playback should resume
print("Interruption Ended - playback should resume")
player?.play()
} else {
// Interruption Ended - playback should NOT resume
print("Interruption Ended - playback should NOT resume")
}
}
}
}
@objc func didTapPlayPauseButton() {
if player?.timeControlStatus == .playing {
//pause
player?.pause()
//show play button
playPauseButton.setBackgroundImage(UIImage(systemName: "play.fill"), for: .normal)
//shrink image
UIView.animate(withDuration: 0.2, animations: {
self.albumImageView.frame = CGRect(x: 50,
y: 50,
width: self.holder.frame.size.width - 100,
height: self.holder.frame.size.width - 100)
})
}
else {
//play
player?.play()
//show pause button
playPauseButton.setBackgroundImage(UIImage(systemName: "pause.fill"), for: .normal)
//increase image size
UIView.animate(withDuration: 0.4, animations: {
self.albumImageView.frame = CGRect(x: 20,
y: 20,
width: self.holder.frame.size.width - 40,
height: self.holder.frame.size.width - 40)
})
}
}
private func setupView() {
setupConstraints()
}
private func setupConstraints() {
NSLayoutConstraint.activate([
holder.leadingAnchor.constraint(equalTo: view.leadingAnchor),
holder.trailingAnchor.constraint(equalTo: view.trailingAnchor),
holder.topAnchor.constraint(equalTo: view.topAnchor),
holder.bottomAnchor.constraint(equalTo: view.bottomAnchor),
])
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
player?.play()
UIApplication.shared.isIdleTimerDisabled = true
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
player?.pause()
UIApplication.shared.isIdleTimerDisabled = false
}
}
This is the structure of the Adio
import Foundation
struct Audio {
let name: String
let albumName: String
let paragraphNumber: String
let audioImageName: String
let trackURL: String
}
This is AudiosViewModel
import Foundation
import FirebaseFirestore
class AudiosViewModel: ObservableObject {
@Published var audios = [Audio]()
private var db = Firestore.firestore()
func fetchData() {
db.collection("audios").addSnapshotListener { [self] (querySnapshot, error) in
guard let documents = querySnapshot?.documents else {
print("No Documents")
return
}
self.audios = documents.map { (queryDocumentSnapshot) -> Audio in
let data = queryDocumentSnapshot.data()
let name = data["name"] as? String ?? ""
let albumName = data["albumName"] as? String ?? ""
let audioImageName = data["audioImageName"] as? String ?? ""
let paragraphNumber = data["paragraphNumber"] as? String ?? ""
let trackURL = data["trackURL"] as? String ?? ""
print(data)
return Audio(name: name, albumName: albumName, paragraphNumber: paragraphNumber, audioImageName: audioImageName, trackURL: trackURL)
}
}
}
}
CodePudding user response：
In the view model that populates the cells with data, add an image property.
var image: UIImage?
In cellForRowAt where you fetch the image, in addition to injecting the image into the cell, save it to the view model.
var song = viewModel.audios[indexPath.row]
song.image = fetchedImage
Add an image property to the AudioPlayerViewController view controller.
var mainImage = UIImage(named: "placeHolderImage")
In didSelectRowAt, inject the detail view controller with the image from the model before presenting it.
vc.mainImage = viewModel.image
present(vc, animated: true)
There is no need to download the image again if it was just downloaded by the previous view controller. Simply expand your view model to include this image and pass it forward when it comes time to present.