struct LePlay: View {

    var fileName: String
    
    init(fileName: String) {
        self.fileName = fileName
    }
    
    @State var player: AVPlayer? = nil

    @State var isplaying = false
    @State var showcontrols = true
    @State var value : Float = 0
        
    var body: some View {
        
        ZStack{
            if(player != nil){
                CustomVideoPlayer(player: self.$player, isplaying: $isplaying)
                    .frame(width: 777, height: 777, alignment: .center)

                
                if(self.showcontrols){
                    Controls(player: self.$player, isplaying: self.$isplaying, pannel: self.$showcontrols, value: self.$value, memeHeight: 777, fileName: fileName)
                }
            }
        }
        .onAppear(){
            player = AVPlayer(url: URL(string: fileName)!)
        }
    }
}

I get:

Cannot convert value of type 'Binding<AVPlayer?>' to expected argument type 'Binding<AVPlayer>'

Why do I still get this error despite having if(player != nil){} ?

Adding ! like self.$player! also doesn't solve the problem!

I tried to do just var player = AVPlayer(url: URL(string: fileName)!) right at the beginning but it doesn't work.

Nothing basic just works in this horrendous garbage language, it's disgusting and unintuitive. I'm getting sick and tired of swift.

CodePudding user response：

The error states that you cannot bind an optional type to a non-optional Binding.

But a Binding is not necessary at all, it's even wrong.

1. AVPlayer is a subclass of NSObject, a reference type. A @State property wrapper is for value types. As you certainly are not going to modify the player's reference in memory just pass the reference.
2. As you have implemented init initialize the player there.

struct LePlay: View {

    var fileName: String
    let player: AVPlayer
    
    init(fileName: String) {
        self.fileName = fileName
        player = AVPlayer(url: URL(string: fileName)!)
    }
}

Delete

.onAppear(){
    player = AVPlayer(url: URL(string: fileName)!)
}

and change

CustomVideoPlayer(player: player, isplaying: $isplaying)

Replace the Binding in CustomVideoPlayer and the other class just with

let player : AVPlayer

CodePudding user response：

What you are doing still doesn't change what player is.

Take a look at this example...

let a: String? = "Hello, world!"

// The type of a is Optional<String> (aka String?)

if a != nil {
  // this code will run because a is not nil
  // but the type of a is still Optional<String>
}

To fix your code you can use optional binding...

let a: String? = "Hello, world!"

// The type of a is Optional<String> (aka String?)

if let a {
  // this code will run because a is not nil
  // and now the type of a inside this block is String and no longer Optional
}