QSplashscreen背景当我反复单击时会变黑

Question

I am using QSplashscreen to display a splashscreen in my application. Usually when I click on the splash screen while my applicaiton is loading the splash sccreen disappears. I saw that the mousepressevent on Qsplashscreen are made to call hide function of the widget.

But sometimes when I click on the splashscreen repeatedly the splashscreen background becomes black and if I continue clicking I get a message saying the applicaiton is not reponding. But after a while the app runs fine.

Why am i sometimes getting a blackbackground on mouse click on splashscreen? The Qt version i am using is 4.8.5

Answer 1

I was running into this issue as well and I found the best solution was to disable the QSplashScreen that way any user interaction wouldn't fire any events.

I tested this on Qt v5.8 but this should also work for v4.8.5 as well.

Answer 2

The reason why are you getting black background and "not responding" messages is probably because your main application need some time to load, that means it's blocking the main event loop .Most people try to disable all events that QSplashScreen implements, but that solution doesn't work. So the easiest solution is to call QApplication.processEvents from time to time while you are constructing your main application.

Note that you should separate your business logic from your presentation logic, exactly because of things like this.It will be a lot easier to solve problems like this.