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This article mainly shows you "how to use messagebox in PyQt5", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "how to use messagebox in PyQt5" this article.

Preface

How to use messagebox will be introduced. Messagebox can be used in message box, warning box, query box, error box, about dialog box, etc.

1. Basic knowledge 1. Introduction to messagebox

Messagebox is a message dialog box, which can prompt the user to focus on the message and obtain the user's choice, so that it is easy to control the execution of the program under special circumstances.

The standard button types are as follows

Example 1. QT Designer design UI

Open designer.exe, create it using the default Main Window, and click the Create button directly.

The design UI diagram is as follows, and saved as messagebox.ui

2 convert messagebox.ui to ui_messagebox.py

Enter the messagebox.py directory and enter pyuic5-o ui_messagebox.py messagebox.ui

3 write python program # encoding=utf-8import sysimport PyQt5.QtWidgets as qwimport ui_msgboxclass myForm (qw.QWidget Ui_msgbox.Ui_Form): def _ init__ (self): super (). _ init__ () self.setupUi (self) self.btn_info.clicked.connect (self.btn_info_cb) self.btn_warn.clicked.connect (self.btn_warn_cb) self.btn_critical.clicked.connect (self.btn_critical_cb) self.btn_ Question.clicked.connect (self.btn_question_cb) self.btn_about.clicked.connect (self.btn_about_cb) def btn_info_cb (self): print ("ready to show messagebox.") Res = qw.QMessageBox.information (self, "prompt", "I am MessageBox of type info!" , qw.QMessageBox.Yes | qw.QMessageBox.No) if (qw.QMessageBox.Yes = = res): print ("[info] you clicked yes button!") Elif (qw.QMessageBox.No = = res): print ("[info] you clicked no button!") Def btn_warn_cb (self): res = qw.QMessageBox.warning (self, "warning", "I am MessageBox of type warn!" , qw.QMessageBox.Yes | qw.QMessageBox.No) if (qw.QMessageBox.Yes = = res): print ("[warn] you clicked yes button!") Elif (qw.QMessageBox.No = = res): print ("[warn] you clicked no button!") Def btn_critical_cb (self): res = qw.QMessageBox.critical (self, "error", "I am MessageBox of type critical!" , qw.QMessageBox.Abort | qw.QMessageBox.Cancel) if (qw.QMessageBox.Abort = = res): print ("[critical] you clicked Abort button!") Elif (qw.QMessageBox.Cancel = = res): print ("[critical] you clicked Cancel button!") Def btn_question_cb (self): res = qw.QMessageBox.question (self, "ask", "I am MessageBox of critical type", qw.QMessageBox.Retry | qw.QMessageBox.Ok) if (qw.QMessageBox.Retry = = res): print ("[question] you clicked Retry button!") Elif (qw.QMessageBox.Ok = = res): print ("[question] you clicked Ok button!") Def btn_about_cb (self): qw.QMessageBox.about (self, "about", "I am MessageBox of type critical!") if _ _ name__ = ='_ main__': app = qw.QApplication (sys.argv) w = myForm () w.show () sys.exit (app.exec_ ())

First, set the button designed with QT Designer in the previous step, add the corresponding messagebox, and get the user's click on the situation, which is displayed through the console log.

III. Operation

Enter the file directory and type python3 run.py to pop up the above page designed with QT Designer.

Click info button:

Click warn button:

Click critical button:

Click question button:

Click about button:

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