How to output the current value of an @State property in the Xcode console-CodePudding

When I try to output the value of an @State property in the Xcode console with po I get this error:

po myValue
error: expression failed to parse:
error: Couldn't lookup symbols:
  MyApp.MainView.myValue.getter : Swift.Double

Tried with p myValue but it gives same error, the only way to get something is via

CodePudding user response：

The only working solution for now that I know if is with:

po _myValue._value

but I am not sure if this is the correct way of doing it.

CodePudding user response：

@State is actually a Property Wrapper. What that means is, when you create:

@State var myValue: T

myValue is actually a computed property, in the form similar to:

var myValue: T {
    get { _myValue.wrappedValue }
    set { _myValue.wrappedValue = newValue }
}

Where as the actual property is stored as:

var _myValue: State<T>

Which is why po myValue wasn't working, and you must've used po _myValue instead.