Question

我正在尝试在我的Qt应用程序中处理某些内容时显示一个带有消息的窗口，因此我决定使用QProgressDialog。

但我有问题，文字标签没有显示： QProgressDialog not showing the text label

我的代码：

QProgressDialog progressDialog(this);
progressDialog.setWindowTitle("Cargando");
progressDialog.setLabelText("Cargando los datos del volumen, por favor espere");
progressDialog.setCancelButton(0);
progressDialog.show();

// DOING SOME STUFF

progressDialog.close();

我意识到，如果我使用progressDialog.exec()而不是progressDialog.show()，则会显示文本标签，但应用程序会被阻止。

有人可以帮助我吗？

Answer 1

The reason your dialog isn't showing anything is probably because of your `DOING SOME STUFF. If you are doing this stuff on the main thread, it will block your UI -and the dialog from drawing it's contents.

Depending on what this stuff is, you have 2 options:

If you are doing something in a loop, just call QApplication::processEvents on every iteration.

If the operations themselve take longer or it's not a loop, you will have to execute this stuff asynchronously, on a different thread. For example, by using QtConcurrent::run. Use a QFutureWatcher to close the dialog once the concurrent operation finished

QProgressDialog没有显示文本标签

1 个答案: