Screenshot generated by the program:
# The following is the creation of GUI graphical interface.
Import QtCore, QtGui and QtWidgets from pyqt 5.
From mathimport *
Ui_MainWindow class (object):
Def setupUi (itself, main window):
main window . set object name(" main window ")
Main window. resize (800,599)
self.centralwidget = QtWidgets。 QWidget (main window)
self . central widget . set object name(" central widget ")
self.label_2 = QtWidgets。 QLabel(self.centralwidget)
self . label _ 2 . set geometry(Qt core。 QRect(70，90，4 1， 16))
self . label _ 2 . set object name(" label _ 2 ")
self.label_5 = QtWidgets。 QLabel(self.centralwidget)
self . label _ 5 . set geometry(Qt core。 QRect(70， 150，4 1，9))
self . label _ 5 . set object name(" label _ 5 ")
self.label_6 = QtWidgets。 QLabel(self.centralwidget)
self . label _ 6 . set geometry(Qt core。 QRect(50，230，4 1，9))
self . label _ 6 . set object name(" label _ 6 ")
self.label_3 = QtWidgets。 QLabel(self.centralwidget)
self . label _ 3 . set geometry(Qt core。 QRect(270，90，4 1， 16))
self . label _ 3 . set object name(" label _ 3 ")
self.label_7 = QtWidgets。 QLabel(self.centralwidget)
self . label _ 7 . set geometry(Qt core。 QRect(270， 150，4 1，9))
self . label _ 7 . set object name(" label _ 7 ")
self.lineEdit = QtWidgets。 QLineEdit(self.centralwidget)
self . line edit . set geometry(Qt core。 QRect(50， 1 10，7 1，3 1))
self . line edit . set object name(" line edit ")
self.lineEdit_2 = QtWidgets。 QLineEdit(self.centralwidget)
self . line edit _ 2 . set geometry(Qt core。 QRect(50， 170，7 1，3 1))
self . line edit _ 2 . set object name(" line edit _ 2 ")
self.lineEdit_3 = QtWidgets。 QLineEdit(self.centralwidget)
self . line edit _ 3 . set geometry(Qt core。 QRect(250， 1 10，7 1，3 1))
self . line edit _ 3 . set object name(" line edit _ 3 ")
self.lineEdit_4 = QtWidgets。 QLineEdit(self.centralwidget)
self . line edit _ 4 . set geometry(Qt core。 QRect(250， 170，7 1，3 1))
self . line edit _ 4 . set object name(" line edit _ 4 ")
self.lineEdit_5 = QtWidgets。 QLineEdit(self.centralwidget)
self . line edit _ 5 . set geometry(Qt core。 QRect(80，220，7 1，3 1))
self . line edit _ 5 . set object name(" line edit _ 5 ")
self.pushButton = QtWidgets。 Q button (self.centralwidget)
self . button . set geometry(Qt core。 QRect( 170，300，56， 17))
self . push button . set object name(" push button ")
main window . setcentralwidget(self . centralwidget)
self.menubar = QtWidgets。 Menu bar (main window)
self . menubar . set geometry(Qt core。 QRect(0，0，800， 18))
self . menubar . set object name(" menubar ")
main window . setmenubar(self . menubar)
self.statusbar = QtWidgets。 QStatusBar (main window)
self . status bar . set object name(" status bar ")
main window . setstatus bar(self . status bar)
Self.retranslateUi (main window)
self . push button . clicked . connect(self . btnshanbing _ click)
QtCore。 QMetaObject.connectSlotsByName (main window)
Define the retranslation interface (itself, main window):
_translate = QtCore。 QCoreApplication.translate
MainWindow . setwindowtitle(_ translate(" main window "，" main window "))
Self.label _ 2.settext (_ translate ("main window", "longitude"))
Self.label _ 5.settext (_ translate ("main window", "longitude"))
Self.label _ 6.settext (_ translate ("main window", "distance"))
Self.label _ 3.settext (_ translate ("main window", "longitude"))
Self.label _ 7.settext (_ translate ("main window", "longitude"))
Self.pushbutton.settext (_ translate ("main window", "OK"))
# The following is the slot function of btnshanbing_click signal.
Def btnshanbing_click (self):
# The following is to read the contents of the text box and convert the type inside to floating-point type.
a=float(self.lineEdit.text())
c=float(self.lineEdit_2.text())
b=float(self.lineEdit_3.text())
d=float(self.lineEdit_4.text())
# The following is the longitude and latitude calculation formula
e =(acos(sin(b * pi/ 180)* sin(d * pi/ 180)+cos(c * pi/ 180-a * pi/ 180)* cos(b * pi/ 180)* cos(d * pi/ 180))* 637 104
# The following is the calculation result generated in LineEdit_5, but it should be noted that the calculation result must be converted into character type, otherwise the program will not run.
self.lineEdit_5.setText(str(e))
Main program:
Self.lineEdit.text (): read the contents of the text box, but it must be converted into float(self.lineEdit.text ()) before calculation can be made, otherwise calculation cannot be made.
Self.lineEdit_5.setText(str ()): The calculation result generated in another text box must be converted to character type, otherwise the program will report an error.
To sum up: the return type of lineEdit.text () is text.