flutter form
final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
Form(
key: _formKey,
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
TextFormField(
decoration: const InputDecoration(
hintText: 'Enter your email',
),
),
ElevatedButton(
onPressed: () { },
child: const Text('Submit'),
),
],
),
),create a validator in flutter
TextFormField(
// The validator receives the text that the user has entered.
validator: (value) {
if (value.isEmpty) {
return 'Please enter some text';
}
return null;
},
);create a validator in flutter
ElevatedButton(
onPressed: () {
// Validate returns true if the form is valid, otherwise false.
if (_formKey.currentState.validate()) {
// If the form is valid, display a snackbar. In the real world,
// you'd often call a server or save the information in a database.
Scaffold
.of(context)
.showSnackBar(SnackBar(content: Text('Processing Data')));
}
},
child: Text('Submit'),
);Copyright © 2021 Codeinu
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