![]() Let's discuss the properties passed to the TextFormField widgets The four TextFormFields widgets are for capturing the user's name, phone number, email address, and password. Step 1: Let's Create an Instance of a Form Widget with a Global Key that holds the Form's State.Įnter fullscreen mode Exit fullscreen mode A user signup form with four input fields for capturing the user's name, phone, email, and password will be used as a case study.Īt this point, you must have created a Flutter project with any valid name of your choice. Let's dive into how Form and TextFormField widgets, and some of their properties can be used to accomplish ease of navigation from one input field to another, and form validation. A TextFormField class, on the other hand, is a widget that wraps a TextField widget in a FormField widget. Note: This article is intended for readers with a basic knowledge of Flutter (i.e., readers who can create and run a Flutter application on an Android or iOS device, and also understand what widgets (both stateful and stateless) are, as used in Flutter).Ī Flutter Form class is a widget that can be used to wrap/group form fields for easy save, reset, or validation of the grouped form fields. Discuss and show how some Form and TextFormField widgets’ properties can be used for a basic form field validation.Discuss and show how some properties of a TextFormField widget can be used to achieve ease of navigation from one TextFormField to another.Explain what Flutter Form and TextFormField classes are.The aim of this article is to demonstrate how to create and, handle a Flutter Form with TextFormField widgets for a better user experience. That being said, it's important to make input forms readily accessible and easy to navigate by users. We see them play crucial roles in scenarios like user signup & login, sending a message on an instant messaging app, checking out orders on an e-commerce app, and so on. You should have something like this: import 'package:flutter/material.Input forms are used in software applications to collect data from users, they're an indispensable component that makes up the user interfaces of any application. ![]() Replace the Flutter default counter application in main.dart with your own stateful widget. Start by creating a new Flutter project in either of VS Code or Android Studio. Only when the user’s input matches the above mentioned do we want to accept their input before making any requests, such as sending to a server or saving in a database. The logic will be defined as such:įirst, for the name field, we want the user to enter a valid first name and last name, which can be accompanied by initials.įor the email field, we want a valid email that contains some characters before the sign, as well as the email domain at the end of the email.įor phone number validation, the user is expected to input 11 digits starting with the digit zero.įinally, for our password validation, we expect the user to use a combination of an uppercase letter, a lowercase letter, a digit, and special character. Creating a form in Flutterįirst, we are going to create a simple login page that has the following fields:įor the validation, we want the users of our app to fill in the correct details in each of these fields. You can find more information on these two approaches in the official Flutter docs. In this article, we’ll cover two approaches to form validation: the form widget and the Provider package. The Flutter SDK provides us with an out-of-the-box widget and functionalities to make our lives easier when using form validation. Getting started with form validation in Flutter
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