Swift ui picker with empty array No exact matches in call to initializer

Question

I have the following problem I have an array at the beginning empty []

Then later it will be filled if certain things happen.

Anyway, as soon as I start the program I get the following error.

Can anyone help me out?

@State var userArray = []

if(userArray.count > 0) {
   Picker("", selection: $user) {
          ForEach(userArray, id: \.self) {
            Text($0)
          }
   }.labelsHidden()
}

Does your userArray array hold and array of a custom class, or String? — Visal Rajapakse
– Visal Rajapakse, Commented Jul 9, 2021 at 16:20

Visal Rajapakse · Accepted Answer · 2021-07-09 16:33:58Z

1

Try explicitly stating what objects you will be storing in userArray, in your case change

@State var userArray = []

to

@State var userArray: [String] = []

or

@State var userArray = [String]()

If you don't explicitly state what you are going to store in a @State variable. Swift will automatically set the data type as Any

Refer the examples I have shown below. The first is before stating the data type, while the second is after I set the data type

This is before explicitly stating what I will be storing on userArray
After explicitly stating that I will be storing an array of strings ([String])

answered Jul 9, 2021 at 16:33

Visal Rajapakse

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2 Comments

Paul Over a year ago

Thx, but on the inside I had tried to do a similar thing if I remember Text($0 as! String) It tightened, but it didn't work.

Visal Rajapakse Over a year ago

Doing that would make it unnecessarily complex

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