1、QTextEdit控件介绍

QTextEdit控件是一个支持多行输入的输入框，支持HTML进行格式的设置

2、QTextEdit控件添加文本、添加HTML格式

# 显示文本
def showText(self):
   self.textedit.setPlainText("hello world")

# 显示HTML
def showHTML(self):
   self.textedit.setHtml('<font color="blue" size="5">Hello World</font>')

注意：这里的添加文本的方式会先将文本框清空再进行添加，若想要追加，则可以使用append方法

?self.textedit.append(要追加的字符串格式的内容)

3、QTextEdit控件获取文本、获取HTML格式文本

# 获取文本
def getText(self):
   print(self.textedit.toPlainText())

# 获取HTML
def getHTML(self):
   print(self.textedit.toHtml())

4、案例

1）完整代码

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2022/5/24 14:52
# @Author  : @linlianqin
# @Site    : 
# @File    : QTextEdit_learn.py
# @Software: PyCharm
# @description:

from PyQt5.QtWidgets import *

class qtexteditlearn(QWidget):
	def __init__(self):
		super(qtexteditlearn, self).__init__()
		self.InitUI()

	def InitUI(self):
		self.setWindowTitle("qtexteditlearn")

		self.textedit = QTextEdit()
		self.button1 = QPushButton("显示文本")
		self.button2 = QPushButton("显示HTML")
		self.button3 = QPushButton("获取文本")
		self.button4 = QPushButton("获取HTML")

		self.resize(300,280)

		layout = QVBoxLayout()
		layout.addWidget(self.textedit)
		layout.addWidget(self.button1)
		layout.addWidget(self.button2)
		layout.addWidget(self.button3)
		layout.addWidget(self.button4)

		self.button1.clicked.connect(self.showText)
		self.button2.clicked.connect(self.showHTML)
		self.button3.clicked.connect(self.getText)
		self.button4.clicked.connect(self.getHTML)

		self.setLayout(layout)

	# 获取文本
	def getText(self):
		print(self.textedit.toPlainText())

	# 获取HTML
	def getHTML(self):
		print(self.textedit.toHtml())

	# 显示文本
	def showText(self):
		self.textedit.setPlainText("hello world")

	# 显示HTML
	def showHTML(self):
		self.textedit.setHtml('<font color="blue" size="5">Hello World</font>')


if __name__ == '__main__':
	import sys
	app = QApplication(sys.argv)
	mainWin = qtexteditlearn()

	mainWin.show()
	sys.exit(app.exec_())

?2）效果

# 获取文本结果

Hello World

# 获取HTML结果
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
<html><head><meta name="qrichtext" content="1" /><style type="text/css">
p, li { white-space: pre-wrap; }
</style></head><body style=" font-family:'SimSun'; font-size:9pt; font-weight:400; font-style:normal;">
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-size:x-large; color:#0000
ff;">Hello World</span></p></body></html>?