Question 75782 in Flutter Question posted in
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The argument type 'String' can't be assigned to the parameter type 'UserProfile' – Flutter

This is rout file and this code is rout of EditProfilePage

This image is EditProfilePage, This code is required things and facing the error because of this.

I expecting the solution of this related error in flutter technology.

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2

Answers


  1. 0

    You need to pass a UserProfile instance on userProfile and the onUpdate is a callback method which return a UserProfile.

    So while creating EditProfilePage it will be like

    UserProfile myUserProfileInstance  = UserProfile(....);
  EditProfilePage( userProfile: myUserProfileInstance, 
  onUpdate: (value){
   ///receive update value
  }
);
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  2. 0

    You have to watch out for the types
    An empty String is not a valid default value for a callback or an Object

    You can create default values for your classes, for example:

    class UserProfile {
  UserProfile({
    required this.name,
    required this.email,
  });

  final String name;
  final String email;

  static UserProfile defaultValue() => UserProfile(
    name: '',
    email: '',
  );
}

    Now if you have to use a UserProfile defaultValue

    EditProfilePage(
  userProfile: UserProfile.defaultValue(),
  onUpdate: (value) {}
)

    For your last comment in the previous answer, did you forget to pass (value) {} instead of '' in the field onUpdate?

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