[英]How do I print in multiple QLabel when I click the PushButton?
单击“按钮”时如何在多个QLabel中打印?,因为它仅适用于“数量”,所以我也希望在“商品名称”和“价格”中使用它。 我试着放多个print_click(self),它说重新定义未使用的'print_clink'不会起作用。 提前致谢
我的代码:
import sys
from PyQt5.QtWidgets import QApplication, QWidget, QHBoxLayout, QPushButton, QLabel, QLineEdit
from PyQt5.QtCore import pyqtSlot`
class Window(QWidget):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
self.ItemName = QLabel('Item Name:')
self.Item_Line = QLabel('')
self.Item_Name = QLineEdit('')
self.PriceName = QLabel('Price:')
self.Price_Line = QLabel('')
self.Price_Name = QLineEdit('')
self.QuantityName = QLabel('Quantity:')
self.Quantity_Line = QLabel('0')
self.Quantity_Name = QLineEdit()
self.Update_button = QPushButton("Update")
self.Update_button.clicked.connect(self.print_click)
self.Clear_button = QPushButton("Clear")
self.Clear_button.clicked.connect(self.clear_click)
hbox = QHBoxLayout(self)
hbox.addWidget(self.ItemName)
hbox.addWidget(self.Item_Name)
hbox.addWidget(self.PriceName)
hbox.addWidget(self.Price_Name)
hbox.addWidget(self.QuantityName)
hbox.addWidget(self.Quantity_Line)
hbox.addWidget(self.Quantity_Name)
hbox.addWidget(self.Update_button)
hbox.addWidget(self.Clear_button)
self.show()
self.Clear_button.clicked.connect(self.Item_Line.clear)
self.Clear_button.clicked.connect(self.Item_Name.clear)
self.Clear_button.clicked.connect(self.Price_Line.clear)
self.Clear_button.clicked.connect(self.Price_Name.clear)
self.Clear_button.clicked.connect(self.Quantity_Line.clear)
self.Clear_button.clicked.connect(self.Quantity_Name.clear)
@pyqtSlot()
def print_click(self):
self.Quantity_Line.setText(self.Quantity_Name.text())
def clear_click(self):
self.Quantity_Line(self.Quantity_Name.text(''))
return self.Quantity
if __name__ == "__main__":
app = QApplication(sys.argv)
win = Window()
sys.exit(app.exec_())
我不能完全确定预期的结果,但是我猜您的代码中存在一些错误和冗余:
Price_Line
和Item_Line
添加到QHBoxLayout
print_click
没有设置从文本Price_Name
和Item_Name
在相应Price_Line
和Item_Line
。 clear_click
方法并不是真正有用,因为您已经连接了该按钮上所有其他元素的clear方法。 以下代码是根据您的代码改编而成的,请注意上述几点:
import sys
from PyQt5.QtWidgets import QApplication, QWidget, QHBoxLayout, QPushButton, QLabel, QLineEdit
from PyQt5.QtCore import pyqtSlot
class Window(QWidget):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
self.ItemName = QLabel('Item Name:')
self.Item_Line = QLabel('')
self.Item_Name = QLineEdit()
self.PriceName = QLabel('Price:')
self.Price_Line = QLabel('')
self.Price_Name = QLineEdit()
self.QuantityName = QLabel('Quantity:')
self.Quantity_Line = QLabel('0')
self.Quantity_Name = QLineEdit()
self.Update_button = QPushButton("Update")
self.Update_button.clicked.connect(self.print_click)
self.Clear_button = QPushButton("Clear")
hbox = QHBoxLayout(self)
hbox.addWidget(self.ItemName)
hbox.addWidget(self.Item_Line)
hbox.addWidget(self.Item_Name)
hbox.addWidget(self.PriceName)
hbox.addWidget(self.Price_Line)
hbox.addWidget(self.Price_Name)
hbox.addWidget(self.QuantityName)
hbox.addWidget(self.Quantity_Line)
hbox.addWidget(self.Quantity_Name)
hbox.addWidget(self.Update_button)
hbox.addWidget(self.Clear_button)
self.show()
self.Clear_button.clicked.connect(self.Item_Line.clear)
self.Clear_button.clicked.connect(self.Item_Name.clear)
self.Clear_button.clicked.connect(self.Price_Line.clear)
self.Clear_button.clicked.connect(self.Price_Name.clear)
self.Clear_button.clicked.connect(self.Quantity_Line.clear)
self.Clear_button.clicked.connect(self.Quantity_Name.clear)
def print_click(self):
self.Price_Line.setText(self.Price_Name.text())
self.Item_Line.setText(self.Item_Name.text())
self.Quantity_Line.setText(self.Quantity_Name.text())
if __name__ == "__main__":
app = QApplication(sys.argv)
win = Window()
sys.exit(app.exec_())
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