Struct not changing with Binding - swiftui

Question

I have this struct
struct MyObject {
var name:String
var color:String
var date:Date
init(name:String = "", color: String = "", date:Date = Date()) {
self.name = name
self.color = color
self.date = date
}
Then I have this on ContentView
#State private var temporaryObject = MyObject()
I send this to a view, like
var body: some View {
DoSomething($temporaryObject)
}
This is DoSomething
struct DoSomething: View {
#Binding var temporaryObject:MyObject
init(_ temporaryObject:Binding<MyObject>) {
self._temporaryObject = temporaryObject
}
var body: some View {
Button(action: {
// here is the problem
temporaryObject.name = "kkkk"
print(temporaryObject.name) // is equal to ""
}, label: {
Text("click me")
})
When I click the button, temporaryObject.name, in theory, is changed to "kkkk" but the print line shows it is still equals to empty.
why?

Answer 1

this example code works well for me. Does this code (taken from your question) not work for you?
struct ContentView: View {
#State private var temporaryObject = MyObject()
var body: some View {
VStack {
DoSomething(temporaryObject: $temporaryObject)
Text(temporaryObject.name) // <-- for testing
}
}
}
struct MyObject {
var name:String
var color:String
var date:Date
init(name:String = "", color: String = "", date:Date = Date()) {
self.name = name
self.color = color
self.date = date
}
}
struct DoSomething: View {
#Binding var temporaryObject:MyObject
var body: some View {
Button(action: {
temporaryObject.name = "kkkk"
print(temporaryObject.name) // is equal to "kkkk"
}, label: {
Text("click me")
})
}
}