Python-PyQt5-图形可视化界面（1）--主窗口--Qmainwindow

1.首先建立一个简单的主窗口

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_mainWindow(object):
    def setupUi(self, mainWindow):
        mainWindow.setObjectName("mainWindow")
        mainWindow.setWindowModality(QtCore.Qt.WindowModal)
        mainWindow.resize(624, 511)
        self.retranslateUi(mainWindow)
        QtCore.QMetaObject.connectSlotsByName(mainWindow)
    def retranslateUi(self, mainWindow):
        _translate = QtCore.QCoreApplication.translate
        mainWindow.setWindowTitle(_translate("mainWindow", "hello word"))

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    mainWindow = QtWidgets.QMainWindow()
    ui = Ui_mainWindow()
    ui.setupUi(mainWindow)
    mainWindow.show()
    sys.exit(app.exec_())

2.调整窗口大小

本代码中窗口初始化大小是长为624，高为511的一个窗口。

窗口产生之后可进行拉伸。还可以禁止窗体拉伸，代码如下：

mainWindow.setFixedSize(624,511)

3.修改窗体标题

修改标题是用setwindowtitle来进行修改的

mainWindow.setWindowTitle(_translate("mainWindow", "hello word"))  
本行代码setwindowtitle是设置标题。

还可以直接简化，如下：

mainWindow.setWindowTitle()      
比如：mainWindow.setWindowTitle('您好')

4.添加图标效果

添加图标效果使用QIcon来进行添加的。

from PyQt5.QtGui import QIcon
mainWindow.setWindowIcon(QIcon('logo.png'))

 

总结

代码中有setupUi和retranslateUi,实际上，retranslateUi是可以不要的。

至于标题，图标这些方法：

mainWindow.setWindowTitle()
mainWindow.setWindowIcon()

不管放在setupUi和retranslateUi哪个中都是可以的。

最终达到禁止拉伸，标题为您好，添加LOGO的窗口效果代码可以有一下几种：

1）代码1

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtGui import QIcon

class Ui_mainWindow(object):
    def setupUi(self, mainWindow):
        mainWindow.setObjectName("mainWindow")
        mainWindow.setWindowModality(QtCore.Qt.WindowModal)
        mainWindow.resize(624, 511)
        # mainWindow.setFixedSize(841,556)
        self.retranslateUi(mainWindow)
        QtCore.QMetaObject.connectSlotsByName(mainWindow)
    def retranslateUi(self, mainWindow):
        _translate = QtCore.QCoreApplication.translate
        mainWindow.setWindowTitle('您好')
        mainWindow.setWindowIcon(QIcon('logo.png'))
if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    mainWindow = QtWidgets.QMainWindow()
    ui = Ui_mainWindow()
    ui.setupUi(mainWindow)
    mainWindow.show()
    sys.exit(app.exec_())

2）代码2

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtGui import QIcon

class Ui_mainWindow(object):
    def setupUi(self, mainWindow):
        mainWindow.setObjectName("mainWindow")
        mainWindow.setWindowModality(QtCore.Qt.WindowModal)
        mainWindow.resize(624, 511)
        # mainWindow.setFixedSize(841,556)
        self.retranslateUi(mainWindow)
        QtCore.QMetaObject.connectSlotsByName(mainWindow)
        mainWindow.setWindowTitle('您好')
        mainWindow.setWindowIcon(QIcon('logo.png'))
    def retranslateUi(self, mainWindow):
        _translate = QtCore.QCoreApplication.translate
if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    mainWindow = QtWidgets.QMainWindow()
    ui = Ui_mainWindow()
    ui.setupUi(mainWindow)
    mainWindow.show()
    sys.exit(app.exec_())

3）代码3

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtGui import QIcon

class Ui_mainWindow(object):
    def setupUi(self, mainWindow):
        mainWindow.setObjectName("mainWindow")
        mainWindow.setWindowModality(QtCore.Qt.WindowModal)
        mainWindow.resize(624, 511)
        # mainWindow.setFixedSize(841,556)
        QtCore.QMetaObject.connectSlotsByName(mainWindow)
        mainWindow.setWindowTitle('您好')
        mainWindow.setWindowIcon(QIcon('logo.png'))
if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    mainWindow = QtWidgets.QMainWindow()
    ui = Ui_mainWindow()
    ui.setupUi(mainWindow)
    mainWindow.show()
    sys.exit(app.exec_())