[FIXED] How to set the initial width can use QListWidget and use splitter to adjust the size？

Issue

hi，I want to set the initial width can use QListWidget，and use splitter to adjust the size.

I want such as this.

but now，when I use the splitter, is like this.

Solution

There's no way to set initial sizes of QSplitter children using Qt Designer. Once you've converted from .ui to .py, you can set the size of each pane using setSizes(list_of_sizes). i.e. for a two-pane window:

splitter = QtWidgets.QSplitter()
splitter.setSizes((50,100))

Answered By - Crispin