[英]How to pass array of string from to view model to play song in swiftUI
I've created a model and added nested struct.我创建了一个 model 并添加了嵌套结构。 created an array based on one of the struct details and I want to retrieve the details from Model to view model to play the music.根据结构详细信息之一创建了一个数组,我想从 Model 中检索详细信息以查看 model 以播放音乐。
I want to retrieve this "aURL" strings and insert it inside the play function to play the music.我想检索这个“aURL”字符串并将其插入到播放 function 中以播放音乐。
class myViewModel: ObservableObject {
@Published var isPlaying = false
var player = AVAudioPlayer()
func play(){
do{
player = try AVAudioPlayer(contentsOf: Array[0] as URL )
if player.isPlaying{player.pause()}
else{player.play()}
isPlaying = player.isPlaying
}catch{print("error")}
}
}
Make var feelSongs: [myModel.MA]
to static like制作var feelSongs: [myModel.MA]
到 static 之类的
static var feelSongs: [myModel.M.A]
And use it inside view model like this并像这样在视图 model 内使用它
class MyViewModel: ObservableObject {
@Published var isPlaying = false
var player = AVAudioPlayer()
var arrData = myModel.M.feelSongs
func play(with url: URL?){
guard let url = url else {
return
}
do{
player = try AVAudioPlayer(contentsOf: url )
if player.isPlaying{player.pause()}
else{player.play()}
isPlaying = player.isPlaying
}catch{print("error")}
}
}
Note: Class Name and struct name start with Capital latter.注意: Class 名称和结构名称以大写字母开头。
Your struct nested in struct nested in struct is strange, anyway I don't know your idea.你的结构嵌套在结构中嵌套在结构中很奇怪,反正我不知道你的想法。
please test this:请测试一下:
class MyModel: Codable {
var feelSongs: [MyModel.M.A] = [
MyModel.M.A.init(id: 1, afcontent: "Feeling Happy", aURL: "a1.mp3", isOn: true),
MyModel.M.A.init(id: 2, afcontent: "Feeling Sad", aURL: "a2.mp3", isOn: true),
MyModel.M.A.init(id: 3, afcontent: "Feeling Positive", aURL: "a3.mp3", isOn: true),
MyModel.M.A.init(id: 4, afcontent: "Feeling Healthy", aURL: "a4.mp3", isOn: true)
]
struct M: Codable{
var mURL: String
var bgMusic : String
var bgVol : Double
struct A : Codable, Identifiable {
var id : Int
var afcontent : String
var aURL : String
var isOn : Bool
}
}
}
class MyViewModel: ObservableObject {
@Published var isPlaying = false
var player = AVAudioPlayer()
var theModel = MyModel()
**//ADDED THIS**
var playNow = 0
func play(){
if playNow >= theModel.feelSongs.count {
return
}
let url = theModel.feelSongs[playNow]
guard let url = URL(string: url) else {
return
}
**//ADDED THIS**
NSNotificationCenter.defaultCenter().addObserver(self, selector: "playerDidFinishPlaying:", name: AVPlayerItemDidPlayToEndTimeNotification, object: item)
do {
player = try AVAudioPlayer(contentsOf: url )
if player.isPlaying{player.pause()}
else{player.play()}
isPlaying = player.isPlaying
}
catch{print("error")}
}
**//ADDED THIS**
func playerDidFinishPlaying(note: NSNotification) {
play()
}
}
//
struct ContentView: View {
var mymodel = MyViewModel()
var body: some View {
//Text("3")
List(mymodel.theModel.feelSongs) { song in
Text(song.afcontent)
}
.onAppear {
mymodel.play()
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
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