Why is this returning nil

Question

Mcrich23 OP

Created Mar ’21

Replies 9

Boosts 0

Views 1.4k

Participants 3

Hi, this code is returning nil always. So frustrating!

Code Block let today = Date()
                        let calendar = Calendar(identifier: .gregorian)
                        let components = calendar.dateComponents([.weekday], from: today)
                        let nineThirtyToday = Calendar.current.date(
                          bySettingHour: 90,
                          minute: 30,
                          second: 0,
                          of: today)
                        print(nineThirtyToday as Any)
                        if components.weekday == 4 {
                            if today <= nineThirtyToday! {
                                if UDM.shared.widgetDefaults?.value(forKey: "currentRiddle") as! String == currentRiddleFinal {
                                    currentRiddleFinal = "Waiting for update from server"
                                }
                            }else {
                                print("Not Nine Thirty")
                            }
                    }
                        UDM.shared.widgetDefaults?.setValue(currentRiddleFinal, forKey: "currentRiddle")
                        print("Current Riddle: \(currentRiddleFinal)")
                    }

Thanks in advance!

Answered by Claude31 in 665789022

Error is
bySettingHour : 90

Should be

bySettingHour : 9

Boost

Answer 1

OOPer OP

Mar ’21

There are no return statement in the shown code, so returning nil always does not make sense.

Please explain what is nil.

0

Answer 2

Mcrich23 OP

Mar ’21

I want it to be if before 9:30 on Wednesdays it says waiting for server to update. However it prints nil and crashes when I force unwrap it.

0

Answer 3

OOPer OP

Mar ’21

it prints nil

Your code has several prints, which one prints nil?

I want it to be if before 9:30

Why are you using 90 for hours?

0

Answer 4

Claude31 OP

Mar ’21

Accepted Answer

Error is
bySettingHour : 90

Should be

bySettingHour : 9

0

Answer 5

Mcrich23 OP

Mar ’21

Thanks, but now the nineThirtyToday print is printing:

Nine Thirty Output Optional(2021-03-10 17:30:00 +0000)

Which is 5:30pm. Any ideas?

0

Answer 6

OOPer OP

Mar ’21

Which is 5:30pm. Any ideas?

Default description of Date uses UTC as TimeZone. If you want to show it in the device TimeZone, you need to use DateFormatter.

0

Answer 7

Mcrich23 OP

Mar ’21

Where would I put that?

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Answer 8

OOPer OP

Mar ’21

Where would I put that?

If you are showing the date just for debugging, you usually do not use DateFormatter and calculate the time difference between UTC and your region.

I guess 17:30 UTC is 09:30 of your region, no? Then your code works as you expect.

Only when you need to create a string representation for users, you need DateFormatter to convert Date to String.

If you do want to use DateFormatter even for debugging output, you can write something like this:

Code Block     let calendar = Calendar(identifier: .gregorian)
    let components = calendar.dateComponents([.weekday], from: today)
    let nineThirtyToday = calendar.date(
        bySettingHour: 9,
        minute: 30,
        second: 0,
        of: today)
    let df = DateFormatter()
    df.timeZone = TimeZone.current
    df.dateStyle = .short
    df.timeStyle = .short
    print(df.string(from: nineThirtyToday ?? Date.distantPast))

(I recommend you to use the same calendar instance when getting components and nineThirtyToday to get consistent values.)

0

Answer 9

Mcrich23 OP

Mar ’21

Thank you so much for your help!

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