I am new using QGIS plugins. I used QtDesigner to build a plugin window with some buttons. But when I open this plugin in QGIS all the formatting is gone. Any idea what is happening?
Could be a resizing issue?
You'll need to set your objects into layouts and sometimes add spacers to ensure what you see in the Qt Designer is the same in QGIS. This also ensures when the window is resized it doesn't mess with your formatting.
If you set your QDialog Class to grid layout just right click in the Object Inspector and change with Lay out>
Set the comboBox and label as horizontal layout. Within the dialog Click on label then Ctrl+Click on the comboBox to select both of them together, then right click and set layout.