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This article shares with you the content of a sample analysis of a single-line text box in PyQt5. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

QLineEdit is a single-line control that allows you to enter and edit plain text. Undo, redo, copy, cut, and paste in the system can all be used for this control.

#! / usr/bin/python3#-*-coding: utf-8-*-import sysfrom PyQt5.QtWidgets import QApplication, QWidget, QLineEdit, QLabelclass Example (QWidget): def _ init__ (self): super (). _ init__ () self.initUI () def initUI (self): self.lb1 = QLabel (self) qle = QLineEdit (self) qle.move (60,100) self.lb1.move (60) 40) qle.textChanged [str] .connect (self.onChanged) self.setGeometry (300,300,280,170) self.setWindowTitle ('single line text') self.show () def onChanged (self, text): self.lb1.setText (text) self.lb1.adjustSize () if _ name__ = ='_ main__': app = QApplication (sys.argv) ex = Example () sys.exit (app.exec_ ())

This example shows a single-line text control and a label control. When we edit typed text in a single-line text control, it is immediately displayed in the label control.

Qle = QLineEdit (self)

Create a QLineEdit control object

Qle.textChanged [str] .connect (self.onChanged)

If the text of the single-line text control changes, we call the onChanged () method.

Def onChanged (self, text): self.lb1.setText (text) self.lb1.adjustSize ()

In the onChanged () method, we set the contents of the single-line text control to be displayed in the label control. The adjustSize () method resizes the label to the length of the text.

After the program is executed

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