Thread 1: Fatal error: Couldn't find WeatherData.json in main bundle."

App Development
1

Hey guys, it has been a long time since I have posted :slight_smile: . My Weather app is showing me this error, and I have no idea what’s wrong. I even cleared the build folder, but still no progress. Can you help? I have the projekt linked below.

Thanks,
Harri

2

The solution was to:

  • copy out the WeatherData.json file from your project using Finder.
  • Delete the file within Xcode.
  • Drag the file back into Xcode making sure that “Copy items if needed” is checked and that “Add to targets” is also set.

I suspect that something was not quite right in the first place when it was initially added.

3

Something else that you might want to take on board is that your ModelData file contains a global variable previewWeather and a global function load().

Probably not a good practices to have global variables and functions so consider this alternative where the two are inside a struct and previewWeather becomes a computed property.

struct ModelData {

    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)")
        }
    }
}

Wherever you have used previewWeather in your code, you would need to change that to:

ModelData().previewWeather