TextFormField class

A FormField that contains a TextField.

This is a convenience widget that wraps a TextField widget in a FormField.

A Form ancestor is not required. The Form simply makes it easier to save, reset, or validate multiple fields at once. To use without a Form, pass a GlobalKey to the constructor and use GlobalKey.currentState to save or reset the form field.

When a controller is specified, its TextEditingController.text defines the initialValue. If this FormField is part of a scrolling container that lazily constructs its children, like a ListView or a CustomScrollView, then a controller should be specified. The controller's lifetime should be managed by a stateful widget ancestor of the scrolling container.

If a controller is not specified, initialValue can be used to give the automatically generated controller an initial value.

For a documentation about the various parameters, see TextField.

See also:



TextFormField({Key key, TextEditingController controller, String initialValue, FocusNode focusNode, InputDecoration decoration: const InputDecoration(), TextInputType keyboardType, TextCapitalization textCapitalization: TextCapitalization.none, TextInputAction textInputAction, TextStyle style, TextAlign textAlign: TextAlign.start, bool autofocus: false, bool obscureText: false, bool autocorrect: true, bool autovalidate: false, bool maxLengthEnforced: true, int maxLines: 1, int maxLength, void onEditingComplete, void onFieldSubmitted, void onSaved, String validator, List<TextInputFormatter> inputFormatters, bool enabled, Brightness keyboardAppearance, EdgeInsets scrollPadding: const EdgeInsets.all(20.0) })
Creates a FormField that contains a TextField. [...]


controller TextEditingController
Controls the text being edited. [...]
autovalidate → bool
If true, this form field will validate and update its error text immediately after every change. Otherwise, you must call FormFieldState.validate to validate. If part of a Form that autovalidates, this value will be ignored.
final, inherited
builder FormFieldBuilder<String>
Function that returns the widget representing this form field. It is passed the form field state as input, containing the current value and validation state of this field.
final, inherited
hashCode → int
The hash code for this object. [...]
read-only, inherited
initialValue → String
An optional value to initialize the form field to, or null otherwise.
final, inherited
key Key
Controls how one widget replaces another widget in the tree. [...]
final, inherited
onSaved FormFieldSetter<String>
An optional method to call with the final value when the form is saved via FormState.save.
final, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited
validator FormFieldValidator<String>
An optional method that validates an input. Returns an error string to display if the input is invalid, or null otherwise. [...]
final, inherited


createState() → _TextFormFieldState
createElement() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree. [...]
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children. [...]
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
toDiagnosticsNode({String name, DiagnosticsTreeStyle style }) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by toStringDeep. [...]
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String
Returns a string representation of this object.
toStringDeep({String prefixLineOne: '', String prefixOtherLines, DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String
Returns a string representation of this node and its descendants. [...]
toStringShallow({String joiner: ', ', DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String
Returns a one-line detailed description of the object. [...]
toStringShort() → String
A short, textual description of this widget.


operator ==(dynamic other) → bool
The equality operator. [...]