Qt中Mainwindow的菜单栏怎么变成白色的,在ui编辑界面的菜单栏后面的黑色背景变成白色

this->SetStyelSheet(""
        "QMenuBar{"                                //将菜单栏背景改为白色
        "background-color:white;"


        "}"


        "QMenu::item{"                             ///将菜单栏上的菜单改为蓝底黑字


        "background-color:blue;"


        "color:black;"


        "}");




[代码] css代码
            	
  
  
  
  

   
   
   
   

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QMenu::item:selected {
 
     
 
    
 
   
  
  
  
  
  
  
  
  

   
   
   
   
 
    
 
     
 
      
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     background-color: #654321;
 
     
 
    
 
   
  
  
  
  
  
  
  
  

   
   
   
   
 
    
 
     
 
      
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}
 
     
 
    
 
   
  
  
  
  
  
  
  
  

   
   
   
   
 
    
 
     
 
      
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QMenu::item:disabled {
 
     
 
    
 
   
  
  
  
  
  
  
  
  

   
   
   
   
 
    
 
     
 
      
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     color: blue;
 
     
 
    
 
   
  
  
  
  
  
  
  
  

   
   
   
   
 
    
 
     
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}