Question 129907 in Xcode Question posted in
Whether you're new to Xcode or an experienced developer, our archive has everything you need to know about this integrated development environment (IDE). From basic functionalities to advanced features, our archive covers a wide range of Xcode-related questions and answers. Browse our archive now and find solutions to your Xcode questions, and take your app development skills to the next level

Xcode – SwiftUI TextFields with Integer

In SwiftUI, I have two textfields. One of them is String and the other should be Int. And I want textfields to appear empty before and after "save" functionality.

this is how I declare my Int variable

@State private var newItemDays: Int?

this is the textfields

TextField("Task Title", text: $newItemTitle)
                        .padding()
                        .background(Color.white)
                    
TextField("Days to Countdown", value: $newItemDays, formatter: NumberFormatter())
                        .keyboardType(.numberPad)
                        .padding()
                        .background(Color.white)

And my Ok button saves them.

 Button("OK") {
                            if let days = newItemDays {
                                
                                let newItem = CountdownItem(title: newItemTitle, daysLeft: days)
                                self.store.add(item: newItem)
                                newItemTitle = ""
                                newItemDays = 0
                                isTextFieldVisible = false
                            }
                            
                        }

If statement always return false even though I put integer there. If I remove optional from the declaration and make it equal to 0, it works but this time I see 0 at the textfields (it should appear empty)

Any help?

Tags:

2

Answers


  1. 0

    You can create a custom NumberFormatter & set the zeroSymbol to be an empty String:

    let formatter: NumberFormatter = {
    let formatter = NumberFormatter()
    formatter.zeroSymbol = ""
    return formatter
}()

    And your TextField becomes:

    TextField("Days to Countdown", value: $newItemDays, formatter: formatter)
    Login or Signup to reply.
  2. 0

    Use format: instead of formatter:

    TextField("Days to Countdown", value: $newItemDays, format: .number)

    When value is Int? it will appear empty initially.

    By the way, you shouldn’t init objects like NumberFormatter() inside body it is a memory leak, best stick to value types.

    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search