QClipboard类提供了对系统剪贴板的访问，可以在应用程序之间复制和粘贴数据，它的操作类似于QDrag类，使用类似的数据类型。
QApplication类有一个静态方法clipboard()，它返回对剪贴板对象的引用。任何类型的MimeData都可以从剪贴板复制或粘贴。
QClipboard类中的常用方法如下表所示：
QClipboard类中的常用信号如下表所示：
通过示例了解QClipboard剪贴数据类，示例中，有6个按钮和2个标签。需要实例化clipboard对象，可以将文本复制到clipboard对象中，也可以将图片复制到剪贴板对象中。
实现代码如下所示：
import os
import sys
from PyQt5.QtCore import QMimeData
from PyQt5.QtWidgets import (QApplication, QDialog, QGridLayout, QLabel,QPushButton)
from PyQt5.QtGui import QPixmap
class Form(QDialog):
def __init__(self, parent=None):
super(Form, self).__init__(parent)
textCopyButton = QPushButton("&Copy Text")
textPasteButton = QPushButton("Paste &Text")
htmlCopyButton = QPushButton("C&opy HTML")
htmlPasteButton = QPushButton("Paste &HTML")
imageCopyButton = QPushButton("Co&py Image")
imagePasteButton = QPushButton("Paste &Image")
self.textLabel = QLabel("Original text")
self.imageLabel = QLabel()
self.imageLabel.setPixmap(QPixmap(os.path.join(
os.path.dirname(__file__), "images/clock.png")))
layout = QGridLayout()
layout.addWidget(textCopyButton, 0, 0)
layout.addWidget(imageCopyButton, 0, 1)
layout.addWidget(htmlCopyButton, 0, 2)
layout.addWidget(textPasteButton, 1, 0)
layout.addWidget(imagePasteButton, 1, 1)
layout.addWidget(htmlPasteButton, 1, 2)
layout.addWidget(self.textLabel, 2, 0, 1, 2)
layout.addWidget(self.imageLabel, 2, 2)
self.setLayout(layout)
textCopyButton.clicked.connect(self.copyText)
textPasteButton.clicked.connect(self.pasteText)
htmlCopyButton.clicked.connect(self.copyHtml)
htmlPasteButton.clicked.connect(self.pasteHtml)
imageCopyButton.clicked.connect(self.copyImage)
imagePasteButton.clicked.connect(self.pasteImage)
self.setWindowTitle("Clipboard 例子")
def copyText(self):
clipboard = QApplication.clipboard()
clipboard.setText("不脱发的程序猿")
def pasteText(self):
clipboard = QApplication.clipboard()
self.textLabel.setText(clipboard.text())
def copyImage(self):
clipboard = QApplication.clipboard()
clipboard.setPixmap(QPixmap(os.path.join(
os.path.dirname(__file__), "./4.jpg")))
def pasteImage(self):
clipboard = QApplication.clipboard()
self.imageLabel.setPixmap(clipboard.pixmap())
def copyHtml(self):
mimeData = QMimeData()
mimeData.setHtml("<b>公众号：美男子玩编程</font></b>")
clipboard = QApplication.clipboard()
clipboard.setMimeData(mimeData)
def pasteHtml(self):
clipboard = QApplication.clipboard()
mimeData = clipboard.mimeData()
if mimeData.hasHtml():
self.textLabel.setText(mimeData.html())
if __name__ == "__main__":
app = QApplication(sys.argv)
form = Form()
form.show()
sys.exit(app.exec_())
