C++ 在Qt中，如何在for循环中添加qstring以相互追加并放入单个消息框中？

这是我写的代码。可以看出，在for循环中使用QString有点困惑。理想情况下，我想要的是一个可以包含for循环qstring消息的单个对话框。你知道如何做到这一点吗

for(size_t idx = 0; idx < count; ++idx){
   libusb_device *device = list[idx];
   libusb_device_descriptor desc = {0};
   rc = libusb_get_device_descriptor(device, &desc);
   assert(rc == 0);
   //Print out desc.idVendor, desc.idProduct
   QString VendorID = QString("%1").arg(desc.idVendor, 0, 16).rightJustified(4, '0');
   QString ProductID = QString("%1").arg(desc.idProduct, 0, 16).rightJustified(4, '0');
   QString USB_BUS = QString("%1").arg(libusb_get_bus_number(device)).rightJustified(1, ' ');
   QString USB_DEVICE = QString("%1").arg(libusb_get_device_address(device)).rightJustified(1, ' ');

   QMessageBox::information(this, "USB Connection Status", QString("VendorID:ProductID = %1:%2 | Bus: %3 Device: %4\n").arg(VendorID).arg(ProductID).arg(USB_BUS).arg(USB_DEVICE));
}

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是的+=为我做了这件事，同时将QMessageBox置于循环之外。我想把这篇文章贴在这里，以防将来有人发现自己和我一样的处境

将QMessageBox从for循环中取出。把它放在循环后面。在单个QString中收集您的消息，并在每次迭代中追加。只需使用+=哦，天哪，我是哑巴哈哈，将其追加到单个字符串。非常感谢！！！正如Drew McGowen提到的，可以制作类似QString字符串的东西；因为……条件。。{string+=…；//添加任何您想要添加的内容}只要+=每转一圈您需要的内容，并将其放入循环后的对话中

for(size_t idx = 0; idx < count; ++idx){
   libusb_device *device = list[idx];
   libusb_device_descriptor desc = {0};
   rc = libusb_get_device_descriptor(device, &desc);
   assert(rc == 0);
   //Print out desc.idVendor, desc.idProduct
   QString VendorID = QString("%1").arg(desc.idVendor, 0, 16).rightJustified(4, '0');
   QString ProductID = QString("%1").arg(desc.idProduct, 0, 16).rightJustified(4, '0');
   QString USB_BUS = QString("%1").arg(libusb_get_bus_number(device)).rightJustified(1, ' ');
   QString USB_DEVICE = QString("%1").arg(libusb_get_device_address(device)).rightJustified(1, ' ');

   USB_STATUS += QString("VendorID:ProductID = %1:%2 | Bus: %3 Device: %4\n").arg(VendorID).arg(ProductID).arg(USB_BUS).arg(USB_DEVICE);
}
QMessageBox::information(this, "USB Connection Status", USB_STATUS);