[英]Multiple buttons are not working in PyQt5 python
我正在PyQt5中制作一个简单的视觉计算器。 我真的没有真正去过计算器部分,因为我在使用按钮时遇到了麻烦。 这是代码:
import sys
from PyQt5.QtWidgets import QMainWindow, QApplication, QWidget, QPushButton, QAction, QLineEdit, QMessageBox
from PyQt5.QtGui import QIcon
from PyQt5.QtCore import pyqtSlot
class App(QMainWindow):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
self.setWindowTitle('Calculator')
self.setGeometry(100, 100, 4000, 1400)
self.num1= QLineEdit(self)
self.num1.move(20, 20)
self.num1.resize(280,40)
self.num2 = QLineEdit(self)
self.num2.move(20, 100)
self.num2.resize(280,40)
#minus button
self.minus = QPushButton('-' , self)
self.minus.move(80,180)
self.minus.resize(20,40)
self.minus.clicked.connect(self.minus_onclick)
self.show()
#plus button
self.plus = QPushButton('+' , self)
self.plus.move(20,180)
self.plus.resize(20,40)
self.plus.clicked.connect(self.plus_onclick)
self.show()
#* button
self.into = QPushButton('*' , self)
self.into.move(140, 180)
self.into.resize(20, 40)
self.into.clicked.connect(self.into_onclick)
self.show()
#division button
self.div = QPushButton('/' , self)
self.div.move(140, 180)
self.div.resize(20, 40)
self.div.clicked.connect(self.div_onclick)
self.show()
def plus_onclick(self):
num1 =int(self.num1.text())
op = '+'
def minus_onclick(self):
num1 =int(self.num1.text())
op = '-'
def into_onclick(self):
num1 =int(self.num1.text())
op = '*'
def div_onclick(self):
num1 =int(self.num1.text())
op = '/'
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = App()
sys.exit(app.exec_())
但是,问题在于无论第一个按钮是哪个,它都可以工作并显示在屏幕上。 我究竟做错了什么? 提前致谢
您需要为窗口指定布局,然后向其添加小部件:
import sys
from PyQt5.QtWidgets import QMainWindow, QApplication, QWidget, QPushButton, QAction, QLineEdit, QMessageBox, \
QVBoxLayout
from PyQt5.QtGui import QIcon
from PyQt5.QtCore import pyqtSlot
class MainWindow(QMainWindow):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
self.setWindowTitle('Calculator')
self.setGeometry(100, 100, 4000, 1400)
self.layout = QVBoxLayout(self)
self.setLayout(self.layout)
self.num1 = QLineEdit(self)
self.num1.move(20, 20)
self.num1.resize(280, 40)
self.layout.addChildWidget(self.num1)
self.num2 = QLineEdit(self)
self.num2.move(20, 100)
self.num2.resize(280, 40)
self.layout.addChildWidget(self.num2)
# minus button
self.minus = QPushButton('-', self)
self.minus.move(80, 180)
self.minus.resize(20, 40)
self.minus.clicked.connect(self.minus_onclick)
self.layout.addChildWidget(self.minus)
# plus button
self.plus = QPushButton('+', self)
self.plus.move(20, 180)
self.plus.resize(20, 40)
self.plus.clicked.connect(self.plus_onclick)
self.layout.addChildWidget(self.plus)
# * button
self.into = QPushButton('*', self)
self.into.move(140, 180)
self.into.resize(20, 40)
self.into.clicked.connect(self.into_onclick)
self.layout.addChildWidget(self.into)
# division button
self.div = QPushButton('/', self)
self.div.move(140, 180)
self.div.resize(20, 40)
self.div.clicked.connect(self.div_onclick)
self.layout.addChildWidget(self.div)
def plus_onclick(self):
if isinstance(self.num1.text(), int):
num1 = int(self.num1.text())
op = '+'
def minus_onclick(self):
if isinstance(self.num1.text(), int):
num1 = int(self.num1.text())
op = '-'
def into_onclick(self):
if isinstance(self.num1.text(), int):
num1 = int(self.num1.text())
op = '*'
def div_onclick(self):
if isinstance(self.num1.text(), int):
num1 = int(self.num1.text())
op = '/'
if __name__ == '__main__':
app = QApplication(sys.argv)
mainWindow = MainWindow()
mainWindow.show()
sys.exit(app.exec_())
另外,最好在类构造函数之外调用show
。
希望能帮助到你。
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