QTextEdit

介绍

QTextEdit类提供了一个用于编辑和显示纯文本和富文本的部件。

方法和属性

**1.toPlainText():获取文本
**2.setText():设置文本
**3.textChanged():再文本每次被改变的时候，发送信号
**4.clear():清空文本
**5.setPlaceholderText():设置占位字符串(只有再文本编辑框么有任何内容的时候才会显示)

制作一个简易的记事本

import sys
from PyQt5.QtWidgets import QApplication,QWidget,QPushButton,QTextEdit,QVBoxLayout,QHBoxLayout,QMessageBox
from PyQt5.QtGui import QIcon

class Simple_Notebook(QWidget):
    def __init__(self):
        super(Simple_Notebook,self).__init__() #使用super函数可以实现子类使用父类的方法
        self.setWindowTitle("记事本")
        self.setWindowIcon(QIcon('NoteBook.png'))
        self.resize(500,500)
        self.text = QTextEdit(self)
        self.text.setText("Have a nice day")
        self.text.setPlaceholderText("Please add some here")
        self.text.textChanged.connect(lambda:print("it is changed"))
        
        self.button_1 = QPushButton("Save",self)
        self.button_2 = QPushButton("Clear",self)
        
        self.button_1.clicked.connect(lambda:self.button_click(self.button_1))
        self.button_2.clicked.connect(lambda:self.button_click(self.button_2))
        
        self.h_layout = QHBoxLayout()
        self.v_layout = QVBoxLayout()
        
        self.h_layout.addWidget(self.button_1)
        self.h_layout.addWidget(self.button_2)
        self.v_layout.addWidget(self.text)
        self.v_layout.addLayout(self.h_layout)
        
        self.setLayout(self.v_layout)
        
    def button_click(self,button):
        if button == self.button_1:
            if choice == QMessageBox.Yes:
                with open('text_edit.txt','w') as f:
                    f.write(self.text.toPlainText())
                self.close()
            elif choice == QMessageBox.No:
                self.close()
        elif button == self.button_2:
            print("文本被清除")
            self.text.clear()
            
if __name__== "__main__":
    app = QApplication(sys.argv)
    test = Simple_Notebook()
    test.show()
    sys.exit(app.exec())
        

ouput:

QTextBrowser

介绍

QTextBrowser类为浏览富文本提供了超文本导航。
调用append方法想文本浏览器中添加文本

import sys
from PyQt5.QtWidgets import QApplication,QWidget,QPushButton,QTextEdit,QVBoxLayout,QHBoxLayout,QMessageBox
from PyQt5.QtGui import QIcon

class Simple_Notebook(QWidget):
    def __init__(self):
        super(Simple_Notebook,self).__init__() #使用super函数可以实现子类使用父类的方法
        self.setWindowTitle("记事本")
        self.setWindowIcon(QIcon('NoteBook.png'))
        self.resize(500,500)
        self.text = QTextBrowser(self)
        self.text.setText("Have a nice day")
        self.text.setPlaceholderText("Please add some here") #设置文本初始化内容，调用setReadOnly方法并传入False参数即可编辑浏览器框
        self.text.textChanged.connect(lambda:print("it is changed"))
        
        self.button_1 = QPushButton("Save",self)
        self.button_2 = QPushButton("Clear",self)
        self.button_3 = QPushButton("Add",self)
        
        self.button_1.clicked.connect(lambda:self.button_click(self.button_1))
        self.button_2.clicked.connect(lambda:self.button_click(self.button_2))
        self.button_3.clicked.connect(self.add_text)
        
        self.h_layout = QHBoxLayout()
        self.v_layout = QVBoxLayout()
        
        self.h_layout.addWidget(self.button_1)
        self.h_layout.addWidget(self.button_2)
        self.h_layout.addWidget(self.button_3)
        self.v_layout.addWidget(self.text)
        self.v_layout.addLayout(self.h_layout)
        
        self.setLayout(self.v_layout)
        
    def button_click(self,button):
        if button == self.button_1:
            if choice == QMessageBox.Yes:
                with open('text_edit.txt','w') as f:
                    f.write(self.text.toPlainText())
                self.close()
            elif choice == QMessageBox.No:
                self.close()
        elif button == self.button_2:
            print("文本被清除")
            self.text.clear()
    def add_text(self):
        self.text.append("hello,world") #调用append方法
            
if __name__== "__main__":
    app = QApplication(sys.argv)
    test = Simple_Notebook()
    test.show()
    sys.exit(app.exec())

output:

希望这篇文章可以帮助到大家，感谢大家的支持。