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pyqt5的控件所有都是集成widget，窗体设置背景图片后控件背景也会跟着改变，此时有2个办法。第一个办法显然我们可以换成其他方式设置窗口背景图片，而不是使用styleSheet样式表，网上有很多其他方法。还有个办法就是仍然用styleSheet样式表，但是我们设计designer时候暂时不管拖放控件，然后转成py文件时候重新设置控件styleSheet。下面是我设计窗体时候出现情况

上面拖了一个控件pushButton就这样了。转成py文件后改下代码如下：

# -*- coding: utf-8 -*-# Form implementation generated from reading ui file 'untitled.ui'
#
# Created by: PyQt5 UI code generator 5.15.9
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.from PyQt5 import QtCore, QtGui, QtWidgets
import image_rcclass Ui_MainWindow(object):def setupUi(self, MainWindow):MainWindow.setObjectName("MainWindow")MainWindow.resize(844, 663)MainWindow.setStyleSheet("border-image: url(:/1/example.jpg);")self.centralwidget = QtWidgets.QWidget(MainWindow)self.centralwidget.setObjectName("centralwidget")self.pushButton = QtWidgets.QPushButton(self.centralwidget)self.pushButton.setGeometry(QtCore.QRect(290, 300, 401, 201))self.pushButton.setObjectName("pushButton")self.pushButton.setStyleSheet('border-image: url(test.png);')MainWindow.setCentralWidget(self.centralwidget)self.menubar = QtWidgets.QMenuBar(MainWindow)self.menubar.setGeometry(QtCore.QRect(0, 0, 844, 30))self.menubar.setObjectName("menubar")MainWindow.setMenuBar(self.menubar)self.statusbar = QtWidgets.QStatusBar(MainWindow)self.statusbar.setObjectName("statusbar")MainWindow.setStatusBar(self.statusbar)self.retranslateUi(MainWindow)QtCore.QMetaObject.connectSlotsByName(MainWindow)def retranslateUi(self, MainWindow):_translate = QtCore.QCoreApplication.translateMainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))self.pushButton.setText(_translate("MainWindow", "PushButton"))
import image_rcif __name__ == "__main__":import sysapp = QtWidgets.QApplication(sys.argv)MainWindow = QtWidgets.QMainWindow()ui = Ui_MainWindow()ui.setupUi(MainWindow)MainWindow.show()sys.exit(app.exec_())