How to get screen size in Qt

Qt includes a very simple method to get the size of the screen (width and height). Here it is:

QSize size = qApp->screens()[0]->size();

Note that this function works perfectly in Android and iOS too.

Another thing to note is that if you replace [0] with 1, 2, 3, … you can access other monitors (if there are any) on desktop computers.

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