Css 如何为QWidget（Qt应用程序中的所有表单背景）设置单个图像？

这是我的

style.qss

，在这里我设置了Qwidget：

/*QMainWindow*/ QWidget
{
        background-image: url(:/myImg/pic/12.png);
}  

我的应用程序中有几个表单，但只是所有的小部件都有背景图像，比如我的按钮、组框和。。。。除了主用户界面。主用户界面是白色的，没有图像。
注意：主窗口是获取背景图像，但其他页面的背景是白色的，没有改变。
这是我的全部css：

/*  ALL      */
*{
    border:none;
    font:10pt "Ubuntu";
        color:white;

}
/*========================================*/
/*     QScrollBar       */
QScrollBar:vertical {
border: none;
background: rgba(0,0,0,0);
width: 40px;
margin: 20px 0px 20px 0px;
}
QScrollBar::handle:vertical {
background: qlineargradient(x1:0, y1:0, x2:1, y2:0,
stop: 0 rgba(183, 210, 192, 255), stop: 0.5 rgba(105, 165, 5, 255), stop:1 rgba(203, 225, 0, 255));
min-height: 20px;
}
QScrollBar::add-line:vertical {
background: qlineargradient(x1:0, y1:0, x2:1, y2:0,
stop: 0 rgba(183, 210, 192, 255), stop: 0.5 rgba(105, 165, 5, 255), stop:1 rgba(203, 225, 0, 255));
height: 20px;
subcontrol-position: bottom;
subcontrol-origin: margin;
}
QScrollBar::sub-line:vertical {
background: qlineargradient(x1:0, y1:0, x2:1, y2:0,
stop: 0 rgba(183, 210, 192, 255), stop: 0.5 rgba(105, 165, 5, 255), stop:1 rgba(203, 225, 0, 255));
height: 20px;
subcontrol-position: top;
subcontrol-origin: margin;
}
/*========================================*/
/*     QWidget - QDialog       */
/*QMainWindow*/ QWidget/*[win="true"]*/
{
        background-image: url(:/myImg/pic/12.png);
}
/*QGroupBox
{
        background-color:rgb(67,67,67);
        border: 1px solid gray;
        border-radius: 9px;
        margin-top: 1em;
}*/




*[taskbox=\"true\"] ,#gbf,#gbfp,#gbborder,#gbusr,#gbauth, #gbsysinfo ,#gbsysinfo2
{
         border: 1px solid gray;
         border-radius: 9px;
         margin-top: 1em;
}
#gbMessage
{
        background-color:rgb(250,250,250);
}


QGroupBox::title
{
        subcontrol-origin: margin;
        subcontrol-position: top center; /* position at the top center */
        /*padding: 3px 3px;*/

}
#gbtransparent
{
    background:transparent;
}
#gbKB
{
    background-color:rgb(60,60,60);
}
#gbKB QPushButton
{
    background-color: qlineargradient(spread:pad, x1:0.0239234, y1:0.966, x2:1, y2:0, stop:0 rgba(0, 0, 0, 255), stop:1 rgba(155, 152, 152, 255));
    border: none;
    color: white;
    padding: 5px 10px;
    text-align: center;
    text-decoration: none;
    min-width:60px;
    min-height:60px;
    font:18px;
}
#gbMessage
{
    background-color: rgb(222, 219, 219);
}
/*==================================*/
QMessageBox
{
    font:14px;
}
QMessageBox QPushButton{font:14pt;}
/*========================================*/
/*  Button  */

QPushButton[mandatoryField="true"] 
{
    background-color: #4CAF50; /* Green */
    border: none;
    color: white;
    padding: 5px 10px;
    text-align: center;
    text-decoration: none;
    min-width:60px;
    min-height:60px; 
}
/*#btnBack
{
    background-color: qlineargradient(spread:pad, x1:1, y1:0.682, x2:1, y2:0, stop:0.142857 rgba(220, 0, 22, 255), stop:0.980296 rgba(216, 74, 73, 255), stop:1 rgba(217, 73, 73, 255));
    border: none;
        border-radius:30px;
    color: white;
    padding: 5px;
        font:18pt "Ubuntu" Bold;
    text-align: center;
    text-decoration: none;
    min-width:30px;
    min-height:30px;

}*/


#Functions QPushButton
{
    background-color: qlineargradient(spread:pad, x1:1, y1:0.682, x2:1, y2:0, stop:0.142857 rgba(220, 0, 22, 255), stop:0.980296 rgba(216, 74, 73, 255), stop:1 rgba(217, 73, 73, 255));
    border:none ;
    color:white;
}
/*===================*/
/*   QLabel     */

#lbl
{
    font:28px "Ubuntu" Bold;
    color:white;
    padding:5px 10px;
}
#lblText
{
    border:none ;
    color:black;
    font:16px "Ubuntu" Bold;

}
#lblFn
{
    background-color:/* qlineargradient(spread:pad, x1:1, y1:0.682, x2:1, y2:0, stop:0.142857 rgba(220, 0, 22, 255), stop:0.980296 rgba(216, 74, 73, 255), stop:1 rgba(217, 73, 73, 255));*/
qlineargradient(spread:pad, x1:0, y1:1, x2:0.994646, y2:0, stop:0 rgba(0, 0, 0, 255), stop:0.00478469 rgba(0, 0, 0, 255), stop:0.0382775 rgba(11, 62, 9, 255), stop:0.0478469 rgba(26, 137, 184, 255), stop:0.976077 rgba(57, 85, 124, 251), stop:1 rgba(255, 255, 255, 255));
    border:none ;
    color:white;
    font:18px;
    qproperty-alignment: AlignCenter;

}
/*==================================*/
/*        QLINEDIT       */
QLineEdit
{
    color:black;
    background-color: #fff;
    border: 1px solid #ddd;
    font-size:16px Bold;
    color: Black;
        min-height: 45px;
    border-radius:3px;
    border-color: gray;
}
QLineEdit:hover
{
    border-color: #D2691E;
    border-radius:5px;
}
/*==================*/
/*           QCombobox     */
QComboBox {
    border: 1px solid #333333;
    border-radius: 3px;
    /*background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 #797979, stop:0.48 #696969, stop:0.52 #5e5e5e, stop:1 #4f4f4f);
    padding: 1px 23px 1px 3px;*/
    background:rgb(70,70,70);
    min-width: 6em;
    color: #ffffff;
}
QComboBox::drop-down {
    subcontrol-origin: padding;
    subcontrol-position: top right;
    width: 20px;

    border-top-right-radius: 3px;
    border-bottom-right-radius: 3px;
}
QComboBox::down-arrow {
     image: url(:/myImg/pic/down-arrow.png);
}

QComboBox QAbstractItemView{
    background-color: #4f4f4f;
    color: white;
    font:18px;
    selection-background-color: #999999;
    selection-color: #4f4f4f;
}
/*QComboBox{
        background-color: rgb(70,70,70);
        border-color:white;
        color: white;
    padding: 5px 10px;
    font-size: 16px;
    outline: none;
        min-height:30px;
    min-width:70px;
    text-align:center;
}
QComboBox::drop-down
{
    border-width:1px;
    subcontrol-origin: padding;
    subcontrol-position: top right;
    min-width: 45px;
    font:14px;
    border-top-right-radius: 2px;
    border-bottom-right-radius: 2px;
}
QComboBox::drop-down {
    subcontrol-origin: padding;
    subcontrol-position: center right;
    font:16px;


}
QComboBox::down-arrow
{
    image: url(:/myImg/pic/down-arrow.png) 100px 200px;
    width: 35px;
    height: 35px;

}*/
/*QComboBox{
    background-color: rgb(70,70,70);
    color: white;
    padding: 1px;

    font-size: 16px;
    outline: none;

}
QComboBox::drop-down
{
    border-width:1px;
    subcontrol-origin: padding;
    subcontrol-position: top right;
    width: 45px;
    border-top-right-radius: 2px;
    border-bottom-right-radius: 2px;
}
QComboBox::down-arrow
{
    image: url(:/myImg/pic/down-arrow.png) 100px 200px;
    width: 35px;
    height: 35px;

}*/
/*===================================*/
/*               QCheckBox               */
QCheckBox::indicator:unchecked
{
    image: url(:/myImg/pic/chkBox.png);
}
QCheckBox::indicator:checked
{
    image: url(:/myImg/pic/tick.png);
}
QRadioButton::indicator:unchecked
{
    image: url(:/myImg/pic/chkBox.png);
}
QRadioButton::indicator:checked
{
    image: url(:/myImg/pic/tick.png);
}
/*==================================*/
/*            QFrame   */
QFrame
{
    background:transparent;
}
#FrameButton QPushButton
{
    text-align: left;
        padding-top:150px;
    color:white;
}
/*====================================*/
/*             QTableView             */
QTableView
{
    gridline-color: qlineargradient(spread:pad, x1:0, y1:0.5, x2:1, y2:0.5, stop:0 rgba(0, 0, 0, 0), stop: 0.3 rgba(0, 0, 0, 255), stop: 0.7 rgba(0, 0, 0, 255), stop:1 rgba(0, 0, 0, 0));
    background-color:white;

}
QTableView::item
{
    color:gray;
    text-align:center;
}
QHeaderView::section {
    background-color: qlineargradient(x1:0, y1:0, x2:0, y2:1,
                                      stop:0 #616161, stop: 0.5 #505050,
                                      stop: 0.6 #434343, stop:1 #656565);
    color: white;
    padding-left: 4px;
    border: 1px solid #6c6c6c;
}
/*=============================================
==================================================
=================================================*/

---

您是为某些小部件还是为整个应用程序做的？通过设置小部件的样式表，您只能更改它及其子部件，但通过设置应用程序的样式表，您可以为所有UI提供更多全局样式表。我告诉过您这是

style.qss

。这是我的全局样式表。所有这些都适用于我的申请。我的问题是所有UI的背景图像。您是为某些小部件还是为整个应用程序做的？通过设置小部件的样式表，您只能更改它及其子部件，但通过设置应用程序的样式表，您可以为所有UI提供更多全局样式表。我告诉过您这是

style.qss

。这是我的全局样式表。所有这些都适用于我的申请。我的问题只是所有UI的背景图像。