發送一個字符串到QLineEdit

我想知道是否有辦法讓按鈕發送消息到PyQt4中的lineEdit變量。這是我到目前爲止的代碼：發送一個字符串到QLineEdit

import sys 
from PyQt4 import QtGui,QtCore 

class Example(QtGui.QWidget):  
    def __init__(self): 
     super(Example, self).__init__() 
     self.initUI() 

    def initUI(self): 
     qanda = QtGui.QLineEdit() 
     one = QtGui.QPushButton('1',self) 
     two = QtGui.QPushButton('2',self) 
     three = QtGui.QPushButton('3',self) 
     four = QtGui.QPushButton('4',self) 
     five = QtGui.QPushButton('5',self) 
     six = QtGui.QPushButton('6',self) 
     seven = QtGui.QPushButton('7',self) 
     eight = QtGui.QPushButton('8',self) 
     nine = QtGui.QPushButton('9',self) 
     zero = QtGui.QPushButton('0',self) 
     dot = QtGui.QPushButton('.',self) 
     minus = QtGui.QPushButton('-',self) 
     plus = QtGui.QPushButton('+',self) 
     multiply = QtGui.QPushButton('x',self) 
     divide = QtGui.QPushButton('/',self) 
     equals = QtGui.QPushButton('=',self) 
     backspace = QtGui.QPushButton('Backspace',self) 
     xsquared = QtGui.QPushButton('x^2',self) 
     xcubed = QtGui.QPushButton('x^3',self) 
     clear = QtGui.QPushButton('C',self) 

     one.clicked.connect(self.buttonClicked) 
     two.clicked.connect(self.buttonClicked) 
     three.clicked.connect(self.buttonClicked) 
     four.clicked.connect(self.buttonClicked) 
     five.clicked.connect(self.buttonClicked) 
     six.clicked.connect(self.buttonClicked) 
     seven.clicked.connect(self.buttonClicked) 
     eight.clicked.connect(self.buttonClicked) 
     nine.clicked.connect(self.buttonClicked) 
     zero.clicked.connect(self.buttonClicked) 
     dot.clicked.connect(self.buttonClicked) 
     minus.clicked.connect(self.buttonClicked) 
     plus.clicked.connect(self.buttonClicked) 
     multiply.clicked.connect(self.buttonClicked) 
     divide.clicked.connect(self.buttonClicked) 
     equals.clicked.connect(self.buttonClicked) 
     backspace.clicked.connect(self.buttonClicked) 
     xsquared.clicked.connect(self.buttonClicked) 
     xcubed.clicked.connect(self.buttonClicked) 
     clear.clicked.connect(self.buttonClicked) 

     grid = QtGui.QGridLayout() 
     grid.setSpacing(5) 

     grid.addWidget(qanda,0,0,1,4) 
     grid.addWidget(one,4,0) 
     grid.addWidget(two,4,1) 
     grid.addWidget(three,4,2) 
     grid.addWidget(four,3,0) 
     grid.addWidget(five,3,1) 
     grid.addWidget(six,3,2) 
     grid.addWidget(seven,2,0) 
     grid.addWidget(eight,2,1) 
     grid.addWidget(nine,2,2) 
     grid.addWidget(zero,5,0) 
     grid.addWidget(dot,5,1) 
     grid.addWidget(minus,5,3) 
     grid.addWidget(plus,4,3) 
     grid.addWidget(multiply,2,3) 
     grid.addWidget(divide,3,3) 
     grid.addWidget(equals,5,2) 
     grid.addWidget(backspace,1,0) 
     grid.addWidget(xsquared,1,1) 
     grid.addWidget(xcubed,1,2) 

     grid.addWidget(clear,1,3) 

     self.setLayout(grid) 

     self.setGeometry(300, 300, 250, 200) 
     self.setWindowTitle('ldm;sasdklhsdghk dgh jkl;')  
     self.show() 

def buttonClicked(self): 
    sender = self.sender() 
    print(sender.text()) 

def main(): 
    app = QtGui.QApplication(sys.argv) 
    ex = Example() 
    sys.exit(app.exec_()) 


if __name__ == '__main__': 
    main()

我的目標是當有人點擊一個按鈕，如X^2，X^2將顯示上是變量qanda的空白。

如果你想知道，這是一個計算器。

來源

2014-10-26 epcisky21

你需要保持到行編輯的引用，以便以後可以訪問它：

def initUI(self): 
     self.qanda = QtGui.QLineEdit(self) 
     ... 
     grid.addWidget(self.qanda,0,0,1,4) 
     ...

現在，您可以設置線路編輯的文字，像這樣：

def buttonClicked(self): 
     sender = self.sender() 
     print(sender.text()) 
     self.qanda.setText(sender.text())

來源

2014-10-26 22:50:05 ekhumoro

您是否嘗試過setText方法？ http://pyqt.sourceforge.net/Docs/PyQt4/qlineedit.html#setText

來源

2014-10-26 20:42:46

對不起，不工作 – epcisky21 2014-10-26 21:43:41

NameError：全局名稱「QLineEdit的」沒有定義彈起 – epcisky21 2014-10-26 22:03:40

ü需要使用像這樣：「qanda.setText（‘texttoset’）」，你的情況u需要申報qanda與self.qanda和自我使用它：'self.qanda.setText（「 texttoset「）'self讓你的變量傳遞給你的類中的所有方法 – 2014-10-27 14:03:04

發送一個字符串到QLineEdit

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