TextField with Double or Int not binding back ?

Question

rderimay OP

Created Jul ’22

Replies 2

Boosts 1

Views 1.5k

Participants 3

Hi there,

In a SwiftUI View, I have a

@State var test: Double?

and a TextField like that :

TextField("Test", value: $test, formatter: NumberFormatter())

the variable test is constantly nil and never being populated with the Double value of the entered text.

Is it a bug or a concept error of mine ??

Thanks!

Boost

Answer 1

szymczyk OP

Jul ’22

@State properties require you to give them an initial value.

@State var test: Double? = 0.0

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Answer 2

alobaili OP

Jan ’24

I'm facing the same issue on the iOS 17.2 simulator with TextField.init(_:value:format:prompt:). Even though the official documentation provides an example binding to a Double?, every time I submit the text field, the state variable is reset back to nil.

https://developer.apple.com/documentation/swiftui/textfield/init(_:value:format:prompt:)-6ug7k

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