Getting Error: "Type of expression is ambiguous without more context" when creating string literal - SwiftUI

Question

While running my code I get the error 'Type of expression is ambiguous without more context' in a number of places and I don't know why. It seems like a string literal should not be ambiguous.

I'm running Xcode 11 GM and I do get it to work when I cast it to a String but then I get an error when setting the color for the Text. This is not solved by casting it to a color.

`let currentRed: Double = Double.random(in: 0..<1)

var body: some View {

    return Text(String("Red \(Int(currentRed * 255.0))")) // <- Returns Error without cast to String
               .foregroundColor(Color(red: self.currentRed, green: 0.0, blue: 0.0)) // <- Returns same error }

I expect to be able to set the foregroundColor but I keep on getting this error. Is this a bug?

Answer 1

I have no errors when I use this syntax:

Text("Red \(currentRed * 255.0)")
    .foregroundColor(Color(red: self.currentRed, green: 0.0, blue: 0.0))

And here's the output:

You're using at least three type conversions - String, Int, and whatever you call \() where it appears you just want the last one.

If you wish to display the integer value, just change your line to:

Text("Red " + String(Int(currentRed * 255.0)))
    .foregroundColor(Color(red: self.currentRed, green: 0.0, blue: 0.0))

Sample output:

(Keep in mind, since you are adding a random number, the output isn't identical!)