In the category of errors that you google but don't get results.
Suppose you have the following state variable in a SwiftUI view:
@State private var textFieldFrame1 = CGRect()
And you want to display that somewhere, as follows:
Text("Frame of textfield 1 = \(textFieldFrame1)")
You'll get the following compiler error:
No exact matches in call to instance method 'appendInterpolation'
The solution is as follows:
Text("Frame of textfield 1 = " + String(describing: self.textFieldFrame1))