用qt写一个贪吃蛇项目-QT开发中文网

对于AI助手来说，无法实际编写代码。但是以下是一个简单的贪吃蛇项目的代码示例：

#include <QtWidgets>

class Snake : public QWidget {
public:
  Snake(QWidget *parent = nullptr);

protected:
  void paintEvent(QPaintEvent *) override;
  void keyPressEvent(QKeyEvent *) override;

private:
  enum Direction { Up, Down, Left, Right };

  QVector<QPoint> snake;
  QPoint food;
  int score = 0;
  Direction dir = Right;

  void initializeGame();
  void createFood();
  void moveSnake();
  bool isGameOver() const;
};

Snake::Snake(QWidget *parent)
  : QWidget(parent)
{
  setFixedSize(400, 400);
  setWindowTitle("Snake Game");
  initializeGame();
}

void Snake::paintEvent(QPaintEvent *)
{
  QPainter painter(this);
  painter.setRenderHint(QPainter::Antialiasing);

  // draw the snake
  painter.setBrush(Qt::darkGreen);
  for (const auto &segment : snake) {
    painter.drawRect(segment.x(), segment.y(), 10, 10);
  }

  // draw the food
  painter.setBrush(Qt::red);
  painter.drawRect(food.x(), food.y(), 10, 10);

  // draw the score
  painter.setPen(Qt::black);
  painter.setFont(QFont("Arial", 14));
  painter.drawText(rect(), Qt::AlignTop | Qt::AlignRight,
                   QString("Score: %1").arg(score));
}

void Snake::keyPressEvent(QKeyEvent *event)
{
  switch (event->key()) {
  case Qt::Key_Up:
    if (dir != Down) dir = Up;
    break;
  case Qt::Key_Down:
    if (dir != Up) dir = Down;
    break;
  case Qt::Key_Left:
    if (dir != Right) dir = Left;
    break;
  case Qt::Key_Right:
    if (dir != Left) dir = Right;
    break;
  }
}

void Snake::initializeGame()
{
  snake.clear();
  snake << QPoint(20, 20) << QPoint(10, 20) << QPoint(0, 20);

  createFood();

  score = 0;
  dir = Right;

  QTimer *timer = new QTimer(this);
  connect(timer, &QTimer::timeout, this, &Snake::moveSnake);
  timer->start(100);
}

void Snake::createFood()
{
  int x = qrand() % (width() / 10) * 10;
  int y = qrand() % (height() / 10) * 10;
  food = QPoint(x, y);
}

void Snake::moveSnake()
{
  QPoint head = snake.first();
  switch (dir) {
  case Up: head.setY(head.y() - 10); break;
  case Down: head.setY(head.y() + 10); break;
  case Left: head.setX(head.x() - 10); break;
  case Right: head.setX(head.x() + 10); break;
  }
  snake.prepend(head);

  if (head == food) {
    createFood();
    score += 10;
  } else {
    snake.removeLast();
  }

  update();

  if (isGameOver()) {
    QMessageBox::information(this, "Game Over", "You lost!");
    initializeGame();
  }
}

bool Snake::isGameOver() const
{
  // check if the snake has hit a wall
  if (snake.first().x() < 0 || snake.first().x() >= width()
      || snake.first().y() < 0 || snake.first().y() >= height()) {
    return true;
  }

  // check if the snake has hit itself
  for (int i = 1; i < snake.size(); ++i) {
    if (snake.at(i) == snake.first()) return true;
  }

  return false;
}

int main(int argc, char *argv[])
{
  QApplication app(argc, argv);

  Snake game;
  game.show();

  return app.exec();
}