python pyqt5 QTextEdit 多行文本框

setPlainText()
toPlainText()
setHtml()
toHtml()
clear()

image.png

-- coding: utf-8 --

'''
【简介】
PyQt5中 QTextEdit例子

'''

from PyQt5.QtWidgets import QApplication, QWidget, QTextEdit, QVBoxLayout, QPushButton
import sys

class TextEditDemo(QWidget):
def init(self, parent=None):
super(TextEditDemo, self).init(parent)
self.setWindowTitle("QTextEdit 例子")
self.resize(300, 270)
self.textEdit = QTextEdit()
self.btnPress1 = QPushButton("显示文本")
self.btnPress2 = QPushButton("显示HTML")
layout = QVBoxLayout()
layout.addWidget(self.textEdit)
layout.addWidget(self.btnPress1)
layout.addWidget(self.btnPress2)
self.setLayout(layout)
self.btnPress1.clicked.connect(self.btnPress1_Clicked)
self.btnPress2.clicked.connect(self.btnPress2_Clicked)

def btnPress1_Clicked(self):
    self.textEdit.setPlainText("Hello PyQt5!\n点击按钮")

def btnPress2_Clicked(self):
    self.textEdit.setHtml("Hello PyQt5!\n点击按钮。")

if name == "main":
app = QApplication(sys.argv)
win = TextEditDemo()
win.show()
sys.exit(app.exec_())