彼得潘輸的那一天我做出音樂來慶祝自己

開心的音樂總是讓我想起彼得潘輸的那天

這個小小的作品，我花了不少青春歲月，只能等待好心人的發佈，在這要謝謝我們班上的雙軒(特別重要，真得太感謝他們了)，這兩位大大的鼎力相助，可以讓我完成對彼得潘的回憶(輸)！！！以下是基本的畫面！

沒有特別的畫面就簡單的一些元件

//以下是對播放跟暫停的圖片與播放作切換
@IBAction func playSong(_ sender: UIButton) {
if !isPlaying {
playButton.setImage(UIImage(systemName: "pause.fill"), for:.normal)
isPlaying = true
audioPlayer.play()
}else{
playButton.setImage(UIImage(systemName: "play.fill"), for:.normal)
audioPlayer.pause()
isPlaying = false
}
}

再來是對上下首作切換

@IBAction func previousAndNextSong(_ sender: UIButton) {
switch sender.restorationIdentifier {
case "next":
if index == playList.count - 1{
isPlaying = false
playButton.setImage(UIImage(systemName: "play.fill"), for: .normal)
}
index += 1
index %= playList.count
case "previous":
//這邊的小於4秒可以讓他換下一首，但是大於4秒就是原來重播
if audioPlayer.currentTime().seconds < 4{
if index > 0{
index -= 1
}else if index == 0{
index = playList.count-1
}
}
default:
break
}
audioPlayer.pause()
findSongPath(index: index)
time()
updatePlayerUI()
audioPlayer.play()
}

這個是取得播放的時間

func time(){
audioPlayer.addPeriodicTimeObserver(forInterval: CMTimeMakeWithSeconds(1, preferredTimescale: 1), queue: DispatchQueue.main){
(CMTime) -> Void in
if self.audioPlayer.currentItem?.status == .readyToPlay{
let currentTime = CMTimeGetSeconds(self.audioPlayer.currentTime())
self.timeSlider!.value = Float(currentTime)
let all : Int = Int(currentTime)
let m : Int = all % 60
let f : Int = Int(all/60)
var time : String = ""
if f<10{
time = "0\(f):"
}else{
time = "\(f)"
}
if m<10 {
time += "0\(m)"
}else {
time += "\(m)"
}
self.timeLabel.text = time
}
}
}
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/這邊是取的固定時間
func formatConversion(time:Float64) -> String {
let songLengthTime = Int(time)
let minutes = Int(songLengthTime / 60)
let seconds = Int(songLengthTime % 60)
var time = ""
if minutes < 10 {
time = "0\(minutes):"
} else {
time = "\(minutes)"
}
if seconds < 10 {
time += "0\(seconds)"
} else {
time += "\(seconds)"
}
return time
}
func updatePlayerUI() {
let duration = playItem!.asset.duration
let seconds = CMTimeGetSeconds(duration)
songLenght.text = formatConversion(time: seconds)
}

這是音樂結束時直接換下一首

NotificationCenter.default.addObserver(forName: .AVPlayerItemDidPlayToEndTime, object: nil, queue: .main){
(_) in
self.index += 1
self.index %= self.playList.count
self.audioPlayer.pause()
self.findSongPath(index: self.index)
self.audioPlayer.play()
self.updatePlayerUI()
self.time()
}
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//取得音樂
func findSongPath(index: Int) {
let songName = playList[index].name
let image = UIImage(named: songName)
imageLabel.image = image
let fileUrl = Bundle.main.url(forResource: songName, withExtension: "mp3")!
playItem = AVPlayerItem(url: fileUrl)
audioPlayer.replaceCurrentItem(with: playItem)
}

還有背景的漸層

func viewBackGround(){
gridentLayer.frame = view.bounds
gridentLayer.colors = [UIColor.blue.cgColor,UIColor.gray.cgColor,UIColor.black.cgColor]
view.layer.insertSublayer(gridentLayer, at: 0)
gridentLayer.startPoint = CGPoint(x: 0, y: 0)
gridentLayer.endPoint = CGPoint(x: 0.5, y: 1)
gridentLayer.locations = [0,0.3,0.8,1]
}

這個是GitHub,完成度還不是很高還是有一些小小的Bug請多見諒！！！

houston5427/SongDemo

這個的完成時間絕對超過你的想像(我還太嫩了)，對Swift還不是那麼的熟悉只能在網路上、雙軒(2位)同學以及帥氣的彼得潘的意見，真的要努力的學習了有一些方法還真不是很懂！謝謝！