Getting error "Cannot find 'previewWeather' in scope" - swift

Question

I am a beginner developer and I am getting this error "Cannot find 'previewWeather' in scope" when I have the "previewWeather" variable in my "Model Data" file?
struct WeatherView: View {
var weather: ResponseBody
var body: some View {
ZStack(alignment: .leading) {
VStack {
VStack(alignment: .leading, spacing: 5) {
Text(weather.name)
.bold().font(.title)
Text("Today,\(Date().formatted(.dateTime.month() .day().hour().minute()))")
.fontWeight(.light)
}
.frame(maxWidth: .infinity, alignment: .leading)
Spacer()
VStack {
HStack {
VStack(spacing: 20) {
Image(systemName: "sun.max.fill")
.font(.system(size: 40))
Text(weather.weather[0].main)
}
.frame(width: 150, alignment: .leading)
Spacer()
Text(weather.main.feels_like.roundDouble() + "°")
.font(.system(size: 100))
.fontWeight((.bold))
.padding()
}
Spacer()
.frame(height: 80)
AsyncImage(url: URL(string: "https://cdn.pixabay.com/photo/2020/01/24/21/33/city-4791269_960_720.png")) { image in image
.resizable()
.aspectRatio(contentMode: .fit)
.frame(width: 350)
} placeholder: {
ProgressView()
}
Spacer()
}
.frame(maxWidth: .infinity)
}
.padding()
.frame(maxWidth: .infinity, alignment: .leading)
VStack {
Spacer()
VStack(alignment: .leading, spacing: 20) {
Text("Weather now")
.bold().padding(.bottom)
HStack {
WeatherRow(logo: "thermometer", name: "Min temp", value: (weather.main.temp_min.roundDouble() + "°"))
Spacer()
WeatherRow(logo: "thermometer", name: "Max temp", value: (weather.main.temp_max.roundDouble() + "°"))
}
HStack {
WeatherRow(logo: "wind", name: "Wind speed", value: (weather.wind.speed.roundDouble() + "m/s"))
Spacer()
WeatherRow(logo: "humidity", name: "Humidity", value: (weather.main.humidity.roundDouble() + "%"))
}
}
.frame(maxWidth: .infinity, alignment: .leading)
.padding()
.padding(.bottom, 20)
.foregroundColor(Color(hue: 0.685, saturation: 0.988, brightness: 0.377))
.background(.white)
.cornerRadius(20, corners: [.topLeft, .topRight])
}
}
.edgesIgnoringSafeArea(.bottom)
.background(Color(hue: 0.685, saturation: 0.988, brightness: 0.377))
.preferredColorScheme(.dark)
}
}
struct WeatherView_Previews: PreviewProvider {
static var previews: some View {
WeatherView(weather: previewWeather) < -Error is here
}
}
import Foundation
// previewWeather var here -> var previewWeather: ResponseBody = load("weatherData.json").
func load<T: Decodable>(_ filename: String) -> T {
let data: Data
guard let file = Bundle.main.url(forResource: filename, withExtension: nil)
else {
fatalError("Couldn't find \(filename) in main bundle.")
}
do {
data = try Data(contentsOf: file)
} catch {
fatalError("Couldn't load \(filename) from main bundle:\n\(error)")
}
do {
let decoder = JSONDecoder()
return try decoder.decode(T.self, from: data)
} catch {
fatalError("Couldn't parse \(filename) as \(T.self):\n\(error)")
}
}

Answer 1

Try this to fix your error:
struct Weather_Previews: PreviewProvider {
static var previewWeather = previewWeather() // <- your "Model Data"
static var previews: some View {
WeatherView(weather: previewWeather)
}
}