النماذج والمدخلات

TextField(
  decoration: InputDecoration(
    labelText: "الاسم",
    border: OutlineInputBorder(),
  ),
  onChanged: (value) => print(value),
)

final controller = TextEditingController();

TextField(controller: controller);

ElevatedButton(
  onPressed: () => print(controller.text),
  child: Text("إرسال"),
);

final _formKey = GlobalKey<FormState>();

Form(
  key: _formKey,
  child: Column(children: [
    TextFormField(
      validator: (value) =>
        (value == null || value.isEmpty) ? "الحقل مطلوب" : null,
    ),
    ElevatedButton(
      onPressed: () {
        if (_formKey.currentState!.validate()) {
          // البيانات صالحة
        }
      },
      child: Text("تأكيد"),
    ),
  ]),
)