Swift how to use enum to get string value

Question

I have enum:

enum NewProgramDetails: String {
    case Description = "Description", ToMode = "To Mode", From = "From", To = "To", Days = "Days"

    static let allValues = [Description, ToMode, From, To, Days]
}

I want to use this enum to display in my cell depend on indexPath:

cell.textLabel.text = NewProgramDetails.ToMode

error: Cannot assign value of type 'ViewController.NewProgramDetails' to type 'String?'

How can I use enum values to assign it to label text as a string?

You need to access its rawValue. cell.textLabel.text = NewProgramDetails.ToMode.rawValue — Leo Dabus
– Leo Dabus, Commented Jul 27, 2016 at 8:31
Btw No need to assign the same String to it if it is identical to its case. — Leo Dabus
– Leo Dabus, Commented Jul 27, 2016 at 8:35

Danil Shaykhutdinov · Accepted Answer · 2017-01-26 09:08:46Z

19

In swift 3, you can use this

var enumValue = Customer.Physics
var str = String(describing: enumValue)

answered Jan 26, 2017 at 9:08

Danil Shaykhutdinov

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2 Comments

Jonny Over a year ago

Doesn't work for live values, apparently. Like avplayeritem.status.

Eric Aya Over a year ago

String(describing:) should never be used to convert anything to String, it's not its purpose and will give unexpected results in many cases.

vadian · Accepted Answer · 2016-07-27 08:31:37Z

13

Use the rawValue of the enum:

cell.textLabel.text = NewProgramDetails.ToMode.rawValue

answered Jul 27, 2016 at 8:31

vadian

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Comments

Sweeper · Accepted Answer · 2016-07-27 08:40:09Z

7

Other than using rawValue,

NewProgramDetails.ToMode.rawValue // "To Mode"

you can also call String.init to get the enum value's string representation:

String(NewProgramDetails.ToMode)

This will return "ToMode", which can be a little bit different from the rawValue you assigned. But if you are lazy enough to not assign raw values, this String.init method can be used!

answered Jul 27, 2016 at 8:40

Sweeper

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Comments

Nike Kov · Accepted Answer · 2022-01-29 22:49:06Z

I've posted a feedback to feedbackassistant with text:

/>

Code:

let test: AVCaptureDevice.Position = .back
print("This is fail: \(test)")

In debugger:

"This is fail: AVCaptureDevicePosition"

Expected:

"This is fail: back"
"This is fail: AVCaptureDevicePosition.back"
...

So the problem is that enum values with associated values doesn't printed. String(test), Mirror(reflecting: test), String(reflecting: test), String(describing: test) doesn't help too.

</

And here is the answer from apple:

This prints AVCaptureDevicePosition(rawValue: 1), i.e., not just the name of the enum, but the raw value too. Swift can't print the text version of this enum value because it doesn't have it at runtime. This is a C-style enum and so all we have is a number, unless we embedded string equivalent values for C enums into the binary, which we have no plans to do.

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