重新运行程序时如何查看禁用按钮被禁用

发布于 2024-11-07 03:08:18 字数 143 浏览 0 评论 0原文

我创建了很多 qpushbutton 来代表电影院的座位。用户购买座位后，我将这些座位禁用。我想做的就是看到以前禁用的按钮被禁用。我将此禁用按钮保存到 txt 文件并读取其名称，但无法将其指定为我的小部件 Qpushbuttons。有办法解决吗？

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幸福丶如此 2024-11-14 03:08:18

这与其说是一个按钮问题，不如说是一个数据结构问题。您应该以某种方式将您的按钮/座位连接到一个数据结构，该数据结构有助于记录可用和保留的座位。关闭程序后，会将数据写入文件或数据库，随后在打开应用程序时可以再次读取这些数据。然后，您可以再次禁用预留座位的按钮。

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四叶草在未来唯美盛开 2024-11-14 03:08:18

我用 Qt 做了一些简单的例子，我希望这会对您有所帮助：

// list of all seats in order (true means seat is taken, false seat is still free)
QList<bool> seats;

// set some test values
seats.append(true);
seats.append(true);
seats.append(false);
seats.append(true);

// file where the seats will be stored
QFile file("seats.dat");

// save to file
file.open(QIODevice::WriteOnly);
QDataStream out(&file);
out << seats;
file.close();

// remove all seats (just for testing)
seats.clear();

// read from file
file.open(QIODevice::ReadOnly);
QDataStream in(&file);
in >> seats;
file.close();

// simple debug output off all seats
qDebug() << seats;

// you could set the buttons enabled state like this
QList<QPushButton*> buttons; // list of your buttons in the same order as the seat list of course
for (int i = 0; i < seats.count(); ++i)
    buttons[i]->setEnabled(!seats.at(i)); // disables all seats which are already taken

这当然只是一个简单的解决方案，使用 QDataStream 序列化完整的座位列表，但如果您是 Qt/新手，您可以尝试一下C++

I've made some quick example with Qt, I hope this will help you:

// list of all seats in order (true means seat is taken, false seat is still free)
QList<bool> seats;

// set some test values
seats.append(true);
seats.append(true);
seats.append(false);
seats.append(true);

// file where the seats will be stored
QFile file("seats.dat");

// save to file
file.open(QIODevice::WriteOnly);
QDataStream out(&file);
out << seats;
file.close();

// remove all seats (just for testing)
seats.clear();

// read from file
file.open(QIODevice::ReadOnly);
QDataStream in(&file);
in >> seats;
file.close();

// simple debug output off all seats
qDebug() << seats;

// you could set the buttons enabled state like this
QList<QPushButton*> buttons; // list of your buttons in the same order as the seat list of course
for (int i = 0; i < seats.count(); ++i)
    buttons[i]->setEnabled(!seats.at(i)); // disables all seats which are already taken

This is off course just a simple solution using a QDataStream to serialize the complete List of seats, but you can play around with this if you are new to Qt/C++

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