Loop through JSON data and store it in array

Question

So I have JSON data that's in an array (0 is first day of month up until last day of month).

How do I do a loop to go through the whole array and store the 3 times of the day each in their own array (I wish to use these times for notifications later)

The dayForArray variable is just the current day - 1 so that it matches the number in the JSON array.

func parseJSON(_ timesData: Data) -> TimesModel? {
    let decoder = JSONDecoder()
    do {
        let decodedData = try decoder.decode(TimesData.self, from: timesData)
        let time1 = decodedData.data[dayForArray].timings.Time1
        let time2 = decodedData.data[dayForArray].timings.Time2
        let time3 = decodedData.data[dayForArray].timings.Time3

        let time = TimeModel(time1: time1, time2: time2, time3: time3)

        return times

    } catch {
        delegate?.didFailWithError(error: error)
        return nil
    }
}

So, you're saying that this code works, but just for one day, dayForArray, and you want it to apply to each day in the month? — Gabe Spound
– Gabe Spound, Commented Mar 6, 2020 at 19:26
Yes it's working now. But it's only storing the current day's times and that's it. I'd like to grab the whole JSON array and store them so that I can notify users of these 3 time's throughout the day without having to check the app every day — Michael Scott
– Michael Scott, Commented Mar 6, 2020 at 19:36

Joakim Danielson · Accepted Answer · 2020-03-06 19:35:04Z

1

What you need to do is to use map to create an array of TimeModel objects from your json array

let times = decodedData.data.map { 
    TimeModel(time1: $0.timings.Time1, 
              time2: $0.timings.Time2, 
              time3: $0.timings.Time3) 
}

answered Mar 6, 2020 at 19:35

Joakim Danielson

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2 Comments

Michael Scott Over a year ago

Ok so I'm getting somewhere.. I added that but now got the error "Cannot convert return expression of type '[TimeModel]' to return type 'TimeModel?'" I thought this is because in my TimeModel I list the 3 times as Strings, I changed those to array (not sure if I should have?) and now I'm getting "Argument passed to call that takes no arguments". Thanks for the help

Joakim Danielson Over a year ago

@MichaelScott your function is declared to return a TimeModel, change it to return an array [TimeModel]

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