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Q3 qmainwindow menu bar and toolbar
2022-07-18 00:47:00 【Loss of time】
One 、 Knowledge point
① Interface understanding 
▲ The menu bar can only have one
② Menu bar operation
1. Create menu bar
2. Create file menu

3. Create menu items

③ Toolbar operation
1. Create toolbars

2. Settings of toolbar properties

3. Add menu items to toolbars


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