It would be so much easier if you provided simple and complete reproducible code…
So I recreated a simple test code:
enum ResultType {
case success(formula: Float)
case failure
}
struct CustomFunction {
var formula: Float = 0.5
func checkFormula(_ formula: Float) -> ResultType {
if formula > 0 {
return .success(formula: formula)
}
return .failure
}
}
struct CustomFormulaView: View {
@Binding var function: CustomFunction
@State var testFormula: Float = 0
var body: some View {
HStack {
Text(" test formula ")
TextField("", value: $testFormula, format: .number)
}
.onChange(of: testFormula) {
debugPrint("change of test formula: \(testFormula)")
switch function.checkFormula(testFormula) {
case .success(let formula):
debugPrint("before Change: \(function.formula)")
function.formula = formula // Nothing happens
debugPrint("Test formula changed: \(testFormula)")
debugPrint("set to success: \(formula)")
debugPrint("what inside function? \(function.formula)")
/*
Task {
//Generate Image
testImage = await function.image(
size: testImageSize),
simulate: manager.finalSize)
break debugPrint("test image updated for: \(function.formula)")
}
*/
case .failure :
print("failed") ; break
}
}
}
}
struct ContentView: View {
@State var function = CustomFunction()
var body: some View {
CustomFormulaView(function: $function)
Text("\(function.formula)")
}
}
And get what I understand is the expected result
"change of test formula: 2.0"
"before Change: 0.5"
"Test formula changed: 2.0"
"set to success: 2.0"
"what inside function? 2.0"
