Functions inside Structs - no accessible initialisers error Swift

Question

Following loads of advice from SO in building my first app, I have 2 structs.... 1 for a "WorkoutExercise" and one for a "WorkoutExerciseGenerator".

I'm trying to test out my generator but I'm getting a no accessible initialisers error...

Here's struct 1 :

struct WorkoutExercise {

    let name : String
    let reps : Int

}

Here's struct 2, with a little test and print at the bottom (which doesn't work) :

struct WorkoutExerciseGenerator {

    let name: String
    let maxReps: Int

    func generate() -> WorkoutExercise {
        return WorkoutExercise(
            name: name,
            reps: Int(arc4random_uniform(UInt32(maxReps))))
    }

var test = WorkoutExerciseGenerator(name: "squat", maxReps: 10)

    print (test.generate())
}

My thinking here (following a bit of research here https://www.natashatherobot.com/mutating-functions-swift-structs/) is that I'm correctly inserting the parameters for the generator ("squat" and "maxReps:10") so not sure why this wouldn't work? (In this case generating squat + a random number of reps < 10 from "var = test").

After this I'm going to try use an array of exercise names/max rep values to store all my exercises and randomly grab 3 - 6 exercises to create a completely random workout but I think (hopefully) I can work that out if i get this bit

If you are running in a playground move that final brace to the line before var test ... — Paulw11
– Paulw11, Commented Apr 25, 2018 at 9:09
such a rookie error thanks - this also fixed it in my actual project :-) — nc14
– nc14, Commented Apr 25, 2018 at 9:13
@Paulw11 thanks - i also needed to actually call generate in my print statement! — nc14
– nc14, Commented Apr 25, 2018 at 9:16

Lukas Würzburger · Accepted Answer · 2018-04-25 09:21:08Z

2

Move the test variable and the print statement out of the struct.

struct WorkoutExerciseGenerator {
    let name: String
    let maxReps: Int

    func generate() -> WorkoutExercise {
        return WorkoutExercise(
            name: name,
            reps: Int(arc4random_uniform(UInt32(maxReps))))
    }
}

var test = WorkoutExerciseGenerator(name: "squat", maxReps: 10)
print (test.generate())

edited Apr 25, 2018 at 9:21

answered Apr 25, 2018 at 9:13

Lukas Würzburger

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1 Comment

nc14 Over a year ago

that's it as above also, rookie error thanks - i also forget to actually call generate in my print statement

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