Untitled

import 'dart:math';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:sayitahmin_uygulamasi/sonucEkrani.dart';

class tahminEkrani extends StatefulWidget {
  const tahminEkrani({Key? key}) : super(key: key);

  @override
  State<tahminEkrani> createState() => _tahminEkraniState();
}

class _tahminEkraniState extends State<tahminEkrani> {
  var tfTahmin = TextEditingController();
  late int rasgeleSayi = 0;
  late int kalanHak = 5;
  late String ipucu = "";
  FocusNode _focusNode = FocusNode();

  @override
  void initState() {
    super.initState();

    rasgeleSayi = Random().nextInt(101); // 0 - 100 Arası Sayı üretir.
    print("Rasgele Sayımız: $rasgeleSayi");
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text("Tahim Ekranı"),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
          children: <Widget>[
            Text(
              "Kalan Hak: $kalanHak",
              style: TextStyle(color: Colors.lightBlue, fontSize: 30),
            ),
            Text(
              "İpucu: $ipucu",
              style: TextStyle(color: Colors.black54, fontSize: 20),
            ),
            Padding(
              padding: EdgeInsets.only(left: 25.0, right: 25.0),
              child: TextField(
                focusNode: _focusNode,
                controller: tfTahmin,
                keyboardType: TextInputType.number,
                textAlign: TextAlign.center,
                decoration: InputDecoration(
                  labelText: "Tahmin",
                  border: OutlineInputBorder(
                    borderRadius: BorderRadius.all(Radius.circular(10.0)),
                  ),
                ),
              ),
            ),
            SizedBox(
              width: 200,
              height: 50,
              child: ElevatedButton(
                child: Text(
                  "TAHMİN ET",
                  style: TextStyle(color: Colors.white),
                ),
                style: ElevatedButton.styleFrom(primary: Colors.purpleAccent),
                onPressed: () {
                  setState(() {
                    kalanHak = kalanHak - 1;
                  });

                  late int tahmin = int.parse(tfTahmin.text);

                  if (tahmin == rasgeleSayi) {
                    Navigator.pushReplacement(
                        context,
                        MaterialPageRoute(
                            builder: (context) => sonucEkrani(
                                  sonuc: true,
                                )));
                    return;
                  }
                  if (tahmin > rasgeleSayi) {
                    setState(() {
                      ipucu = "Tahminini Azalt";
                    });
                  }
                  if (tahmin < rasgeleSayi) {
                    setState(() {
                      ipucu = "Tahminini Arttır";
                    });
                  }
                  if (kalanHak == 0) {
                    Navigator.pushReplacement(
                        context,
                        MaterialPageRoute(
                            builder: (context) => sonucEkrani(
                                  sonuc: false,
                                )));
                    return;
                  }
                  tfTahmin.text = "";
                  FocusScope.of(context).requestFocus(_focusNode);
                },
              ),
            ),
          ],
        ),
      ),
    );
  }
}