参考如下键盘格式写了一个键盘输入，目前还不能进行运算，后期完善。。。
效果如下：
完整代码：
from PyQt5.QtWidgets import (QApplication,QWidget,QPushButton,QLCDNumber,QFormLayout,QLineEdit,QLabel,QGridLayout)
from PyQt5.QtGui import QFont
from PyQt5.QtCore import Qt,QTimer,QDateTime,QDate,QTime,QSize
import sys class Example(QWidget):
def __init__(self):
super(Example, self).__init__()
self.initUI() def initUI(self):
self.setGeometry(300,300,330,310)
self.setWindowTitle("数字键盘输入")
gridLayout = QGridLayout()
self.display = QLineEdit("")
self.display.setFixedSize(QSize(287,40))
self.display.setReadOnly(True)
self.display.setAlignment(Qt.AlignRight)
self.display.setFont(QFont("微软雅黑",14,QFont.Bold))
gridLayout.addWidget(self.display,0,0,1,4)
self.showNum = "" keys = ['Clear', '/', '*', '-',
'', '', '', '+',
'', '', '', '',
'', '', '', 'Enter',
'', '', '.', '']
position = [(0, 0), (0, 1), (0, 2), (0, 3),
(1, 0), (1, 1), (1, 2), (1, 3),
(2, 0), (2, 1), (2, 2), (2, 2),
(3, 0), (3, 1), (3, 2), (3, 3),
(4, 0), (4, 1), (4, 2), (4, 3), ]
for item in range(len(keys)):
btn = QPushButton(keys[item])
btn.setFixedSize(QSize(60, 40))
btn.setFont(QFont("微软雅黑",12,QFont.Bold))
btn.clicked.connect(self.btnClicked)
if keys[item] == "+":
gridLayout.addWidget(btn, 2, 3, 2, 1)
btn.setFixedSize(QSize(60, 90))
elif keys[item] == "Enter":
gridLayout.addWidget(btn, 4, 3, 2, 1)
btn.setFixedSize(QSize(60, 90))
elif keys[item] == "":
gridLayout.addWidget(btn, 5, 0, 1, 2)
btn.setFixedSize(QSize(142, 40))
elif keys[item] == "":
continue
else:
gridLayout.addWidget(btn, position[item][0]+1, position[item][1], 1, 1)
self.setLayout(gridLayout) def btnClicked(self):
sender = self.sender()
symbols = ["Clear","/","*","-","+","Enter"]
if sender.text() not in symbols:
self.showNum += sender.text()
self.display.setText(self.showNum)
elif sender.text() == "Clear":
self.display.setText("")
self.showNum = "" if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
ex.show()
sys.exit(app.exec_())
今天完善了一下，可以进行简单的+ - * / 运算了，效果如下：
完整代码：
from PyQt5.QtWidgets import (QApplication,QWidget,QPushButton,QLCDNumber,QFormLayout,QLineEdit,QLabel,QGridLayout)
from PyQt5.QtGui import QFont
from PyQt5.QtCore import Qt,QTimer,QDateTime,QDate,QTime,QSize
import sys class Example(QWidget):
def __init__(self):
super(Example, self).__init__()
self.initUI() def initUI(self):
self.setGeometry(300,300,330,310)
self.setWindowTitle("简易计算器")
gridLayout = QGridLayout()
self.display = QLineEdit("")
self.display.setFixedSize(QSize(287,40))
self.display.setReadOnly(True)
self.display.setAlignment(Qt.AlignRight)
self.display.setFont(QFont("微软雅黑",14,QFont.Bold))
gridLayout.addWidget(self.display,0,0,1,4)
self.showNum = ""
self.firstNum = ""
self.lastNum = "" keys = ['Clear', '/', '*', '-',
'', '', '', '+',
'', '', '', '',
'', '', '', 'Enter',
'', '', '.', '']
position = [(0, 0), (0, 1), (0, 2), (0, 3),
(1, 0), (1, 1), (1, 2), (1, 3),
(2, 0), (2, 1), (2, 2), (2, 2),
(3, 0), (3, 1), (3, 2), (3, 3),
(4, 0), (4, 1), (4, 2), (4, 3), ]
for item in range(len(keys)):
btn = QPushButton(keys[item])
btn.setFixedSize(QSize(60, 40))
btn.setFont(QFont("微软雅黑",12,QFont.Bold))
btn.clicked.connect(self.btnClicked)
if keys[item] == "+":
gridLayout.addWidget(btn, 2, 3, 2, 1)
btn.setFixedSize(QSize(60, 90))
elif keys[item] == "Enter":
gridLayout.addWidget(btn, 4, 3, 2, 1)
btn.setFixedSize(QSize(60, 90))
elif keys[item] == "":
gridLayout.addWidget(btn, 5, 0, 1, 2)
btn.setFixedSize(QSize(142, 40))
elif keys[item] == "":
continue
else:
gridLayout.addWidget(btn, position[item][0]+1, position[item][1], 1, 1)
self.setLayout(gridLayout) def btnClicked(self):
sender = self.sender()
symbols = ["Clear","/","*","-","+","Enter"]
if sender.text() not in symbols:
self.showNum += sender.text()
self.display.setText(self.showNum)
elif sender.text() == "Clear":
self.display.setText("")
self.showNum = ""
elif sender.text() == "/":
self.firstNum = self.showNum
self.display.setText("")
self.showNum = ""
self.operator = "/"
elif sender.text() == "*":
self.firstNum = self.showNum
self.display.setText("")
self.showNum = ""
self.operator = "*"
elif sender.text() == "-":
self.firstNum = self.showNum
self.display.setText("")
self.showNum = ""
self.operator = "-"
elif sender.text() == "+":
self.firstNum = self.showNum
self.display.setText("")
self.showNum = ""
self.operator = "+" elif sender.text() == "Enter":
if self.operator == "/":
result = float(self.firstNum) / float(self.showNum)
result = float("%.2f"%result)
elif self.operator == "*":
result = float(self.firstNum) * float(self.showNum)
result = float("%.2f" % result)
elif self.operator == "+":
result = float(self.firstNum) + float(self.showNum)
result = float("%.2f" % result)
elif self.operator == "-":
result = float(self.firstNum) - float(self.showNum)
result = float("%.2f" % result)
self.display.setText(str(result))
self.showNum = "" if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
ex.show()
sys.exit(app.exec_())
简易计算器