SwidtUI iOS - Cannot use instance member x within property initializer; property initializers run before 'self' is available

Question

struct LePlay: View {

    var fileName: String
    
    init(fileName: String) {
        self.fileName = fileName
    }
    
    @State var player = AVPlayer(url: URL(string: "https://blala.com/?n=" + fileName)!)

I get

Cannot use instance member 'fileName' within property initializer; property initializers run before 'self' is available

in the last fileName in the code

I've already seen similar questions but none of the solutions there are working for me

The error seems pretty self-explanatory, did you have a specific question about the error? Why do you need `player` to be a `State` variable? — shim, Jan 17 '23 at 22:29
Here you can see if the explanation why I need it to be state: https://stackoverflow.com/questions/75158327/swift-swiftui-ios-cannot-convert-value-of-type-bindingavplayer-to-expecte#75158486 — Eduard Unruh, Jan 18 '23 at 11:25

Ashley Mills · Accepted Answer · 2023-01-17T22:38:50.043

-1

You need to initialise player in your init, as follows:

struct LePlay: View {
    
    var fileName: String
    @State var player: AVPlayer

    init(fileName: String) {
        self.fileName = fileName
        _player = State(wrappedValue: AVPlayer(url: URL(string: "https://blala.com/?n=" + fileName)!))
    }
}

I'm not sure what will happen here, assigning a class to State.

You should wrap player in an ObservableObject class, which you can assign to a StateObject

edited Jan 17 '23 at 22:38

answered Jan 17 '23 at 22:33

Ashley Mills

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You should be able to just do it without `_` and `State(wrappedValue:)` as of Xcode 14 at least. Though I still don't see why you would ever need an `AVPlayer` to be a `@State`. As Ashley states here, doesn't really make sense to use a `class` as a `State`. – shim Jan 18 '23 at 00:49

SwidtUI iOS - Cannot use instance member x within property initializer; property initializers run before 'self' is available

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