This function takes a string argument which is the current value of its associated input field, and it's called when a user clicks the keyboard action key.įor name, phone, and email input fields, the onFieldSubmitted function is used to pass keyboard focus to the next input field when a user clicks the action key. The above code update added the onFieldSubmitted function property to the TextFormField widgets. We have four FocusNode objects ( _nameFocusNode, _phoneFocusNode, _emailFocusNode, and _passwordFocusNode) declared, initialized and passed to the four TextFormField widgets in our form respectively. Here, a FocusNode object allows keyboard focus to be obtained and pass around amongst input fields. The focusNode property of every TextFormField widget in the Form is assigned a FocusNode object to make the form easily navigable from one input field to another. KeyboardType: TextInputType.emailAddress, + Scaffold.of(context).showSnackBar(SnackBar(content: + FocusScope.of(context).requestFocus(focusNode) + final FocusNode _passwordFocusNode = FocusNode() + final FocusNode _emailFocusNode = FocusNode() + final FocusNode _phoneFocusNode = FocusNode() + final FocusNode _nameFocusNode = FocusNode() Step 3: Make the Form Navigable and Submittable via the Keyboard’s Action Key. labelText: a descriptive label text, shown when the text field has focus or not empty.hintText: a placeholder text, shown when the text field is empty, and.Here, only two of its properties are in use The data is obscured when it's set to true, which applies to the password TextFormField widget.ĭecoration: It takes an instance of the InputDecoration class whose properties describe how the text field is decorated, as its value. ObscureText: it takes a boolean value (with false as default) that determines whether or not the data supplied by the user in the text field is to be obscured. We will see how intuitive and descriptive this is for navigating from one text field to another in the next step. When set to TextInputAction.next the next icon appears as the action key. TextInputAction: its value determines the icon to appear as the keyboard’s action key. characters present when the text field gains focus. For example, passing TextInputType.emailAddress to the keyboardType property of the email address TextFormField widget will display the appropriate keyboard for typing an email address with and. KeyboardType: the type of soft keyboard to pop up when the text field gains focus, passing an appropriate text input type value to this property will add to a better user experience. 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. ![]()
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