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點擊按鈕后，可以將文本框中的文字設(shè)置到標簽中去。另外，在文本框中輸入回車時也能夠進行同樣操作。

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from PyQt5.QtWidgets import *

from PyQt5.QtGui import QPalette,QFont

from PyQt5.QtCore import Qt

import sys

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class PyQt508(QWidget):

??? def __init__(self):

??????? super().__init__()

??????? self.initUI()

??? def initUI(self):

??????? self.setWindowTitle('氣輕PyQt5')??????????????? # 設(shè)置窗口標題

??????? self.resize(420, 50)??????????????????????????? # 設(shè)置窗口大小

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??????? self.edit = QLineEdit(self)???????????????????? # 輸入框

??????? self.edit.setGeometry(10, 0,240, 40)??????????? # 設(shè)置位置和大小

??????? self.edit.setText('edit')

??????? self.edit.setStyleSheet('background-color:#FFE4B5;color : #32CD32; \

??????????????????? font: bold italic large /"Times New Roman/";font-size:25px')

??????? self.edit.returnPressed.connect(self.updateLabel)

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??????? self.btn = QPushButton('按鈕', self)

??????? self.btn.setGeometry(250, 0, 40, 40)

??????? self.btn.setStyleSheet('background-color:#96CDCD;color : #FFE4C4; \

??????????????????? font: bold large /"SimSun/";font-size:16px')

??????? self.btn.clicked.connect(self.updateLabel)

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??????? self.tag = QLabel(self)???????????????????????? # 設(shè)置label信息

??????? self.tag.setGeometry(290, 0,120, 40)??????????? # 設(shè)置位置和大小

??????? self.tag.setText('標簽')

??????? self.tag.setToolTip('標簽提示')???????????????? # 設(shè)置標簽提示

??????? self.tag.setAlignment(Qt.AlignCenter)?????????? # 居中設(shè)置

??????????????????????????????????????????????????????? # 背景和前景顏色

??????? self.tag.setStyleSheet('background-color:yellow;color : #6495ED; \

??????????????????? font: bold italic large /"Times New Roman/";font-size:25px')

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??????? self.show()

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??? def updateLabel(self):

??????? edittext = self.edit.text()

?????? ?self.tag.setText(edittext)

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if __name__ == '__main__':

??? app = QApplication(sys.argv)

??? window = PyQt508()

??? sys.exit(app.exec_())

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執(zhí)行結(jié)果