A PropertyWrapper for load and decode any Decodable from the given bundle.

PropertyWrapper-BundleFile.swift

@propertyWrapper struct BundleFile<DataType> {
    let name: String
    let type: String
    let fileManager: FileManager = .default
    let bundle: Bundle = .main
    let decoder: (Data) -> DataType

    var wrappedValue: DataType {
        guard let path = bundle.path(forResource: name, ofType: type) else { fatalError("Resource not found") }
        guard let data = fileManager.contents(atPath: path) else { fatalError("File not loaded") }
        return decoder(data)
    }
}

// MARK: Examples

struct Example {
    @BundleFile(name: "avatar", type: "jpg", decoder: { UIImage(data: $0)! } )
    var avatar: UIImage
}