CODEWITHSUNDEEP
core-dataswiftui
user698723432423
user698723432423

Reputation: 21

How do I code the example model object in the PreviewProvider in SwiftUI?

I have some code but I don't have all of it. I understand the basics of the code that I have regarding SwiftUI and Core Data but I don't know how to code the redFox model example in the following code.

I tried to code redFox myself but was unable to do so.

import SwiftUI

struct AnimalCell : View
{
    let model: AnimalCellModel

    var body: some View
    {
        HStack
        {
            Text(model.image)
            Text(model.commonName)
            Text(model.familyName)
            Text(model.scientificName)
        }
    }
}

#if DEBUG
public enum AnimalCellPreviews : PreviewProvider
{
    public static var previews: some View
    {
        AnimalCell(model: .redFox)
    }
}
#endif

I should see the preview but can't because the code is incomplete.

Upvotes: 2

Views: 403

Answers (2)

Yakuhzi
Yakuhzi

Reputation: 1249

You need to add redFox as a static property to the AnimalCellModel:

extension AnimalCellModel {
    static var redFox = AnimalCellModel(...)
}

Then you can use it with the .redFox syntax like shown in your example.

Upvotes: 1

Brandon Bradley
Brandon Bradley

Reputation: 3388

Not sure if this is what you're asking for but the standard preview code is as follows:

#if DEBUG
struct ContentView_Previews : PreviewProvider {

    static var previews: some View {
        ContentView()
    }
}
#endif

So in your case it should be:

#if DEBUG
struct AnimalCell_Previews : PreviewProvider {

    static var previews: some View {
        AnimalCell(model: RedFox())
    }
}
#endif

Assuming you have a RedFox struct or class

Upvotes: 0

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