Cannot convert value of type '() -> ()' to expected argument type 'String' SwiftUI Button

Question

marcofusco111 OP

Created Dec ’23

Replies 3

Boosts 0

Participants 3

Hello,

I'm trying to build a simple button. For some reason, I'm getting the following errors:

Cannot convert value of type '() -> ()' to expected argument type 'String'

Incorrect argument label in call (have 'action:_:', expected 'value:selected:')

Button(action: login) {
                ZStack {
                    RoundedRectangle(cornerRadius: 5)
                        .fill(Color.black)
                        .frame(width: UIScreen.main.bounds.width - 50, height: 50)
                    Text("Sign in")
                        .foregroundColor(.white)
                }
            }

All of my buttons in this particular project suddenly have this error. Any help would be greatly appreciated.

Thank you

Boost

Answer 1

thibautrichez OP

Dec ’23

This compile as long as the login value you use for your action is a method. Moreover, AFAIK Button doesn't have a init that takes value:selected:. Do you have a custom type call Button in your code ?

0

Answer 2

Vision Pro Engineer OP

Apple

Dec ’23

The Button initializer is like this:

 Button {
   login()
 } label: {
   ZStack {
                    RoundedRectangle(cornerRadius: 5)
                        .fill(Color.black)
                        .frame(width: UIScreen.main.bounds.width - 50, height: 50)
                    Text("Sign in")
                        .foregroundColor(.white)
                }
 }

as @thibautrichez said, this won’t work if ‘login’ is not an action

0

Answer 3

marcofusco111 OP

Dec ’23

@sha921 @thibautrichez Thank you for your responses. I get the following errors with the code below:

Button {
                login()
            } label: {
                ZStack {
                    RoundedRectangle(cornerRadius: 5)
                        .fill(Color.black)
                        .frame(width: UIScreen.main.bounds.width - 50, height: 50)
                    Text("Sign in")
                        .foregroundColor(.white)
                }
            }

func login() {
print("test")
}

Incorrect argument label in call (have '_: label:', expected 'value:selected:')

Trailing closure passed to parameter of type 'String' that does not accept a closure

Thank you again for the help so far.

0