标签显示

QLabel背景色设置：
palette = QPalette() # 创建调色板
palette.setColor(QPalette.Window, Qt.green) # 设置调色板属性
label.setPalette(palette) # 标签设置Palette
label.setAutoFillBackground(True) # 设为True设置的Palette才会生效

QLabel鼠标单击和鼠标划过事件：
label.linkActivated.connect(self.link_clicked) # 鼠标单击
label.linkHovered.connect(self.link_hovered) # 鼠标划过

QLabel设置是否允许启动浏览器打开超链：
label.setOpenExternalLinks(True)

import sys

from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *

class MyLableWindow(QWidget):
    def __init__(self):
        super().__init__()
        self.setGeometry(0, 0, 800, 600)
        self.setWindowTitle("QLable Demo")
        self.setWindowIcon(QIcon("./pyqt5/close.png"))
        screen = QDesktopWidget().screenGeometry()
        size = self.geometry()
        self.move((screen.width() - size.width())/2, (screen.height() - size.height())/2)
        self.initUI()

    def initUI(self):
        
        label1 = QLabel(self)
        label2 = QLabel(self)
        label3 = QLabel(self)
        label4 = QLabel(self)

        label1.setText("这是一个文本标签")

        label1.setAutoFillBackground(True)
        palette = QPalette()
        palette.setColor(QPalette.Window, Qt.green)
        label1.setPalette(palette)
        label1.setAlignment(Qt.AlignCenter)

        label2.setText("<a href='#'>人生苦短我用Python</a>")
        label2.linkActivated.connect(self.link_clicked)
        label2.linkHovered.connect(self.link_hovered)

        label3.setAlignment(Qt.AlignCenter)
        label3.setToolTip("这是一个图片标签")
        label3.setToolTipDuration(3000)
        label3.setPixmap(QPixmap("./pyqt5/images/big_btn.png"))

        
        label4.setText("<A href='https://www.riverbankcomputing.com/static/Docs/PyQt5/api/qtwidgets/qlineedit.html'>PyQt5 Document</a>")
        label4.setAlignment(Qt.AlignLeft)
        label4.setToolTip("这是一个超链接标签")
        label4.setToolTipDuration(3000)
        # 允许访问超链接
        label4.setOpenExternalLinks(True)
        label4.linkActivated.connect(self.link_clicked)# setOpenExternalLinks 设置为True 不会触发linkActivated
        label4.linkHovered.connect(self.link_hovered)

        vbox = QVBoxLayout()
        vbox.addWidget(label1)
        vbox.addStretch()
        vbox.addWidget(label2)
        vbox.addStretch()
        vbox.addWidget(label3)
        vbox.addStretch()
        vbox.addWidget(label4)
        self.setLayout(vbox)

    def link_hovered(self):
        print("鼠标划过标签")

    def link_clicked(self):
        print("鼠标点击标签")
        
if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = MyLableWindow()
    win.show()
    sys.exit(app.exec_())

标签快捷键功能

nameLb1 = QLabel(‘&Name’, self) # 注意必须是’&'符开头
nameEd1 = QLineEdit(self)
nameLb1.setBuddy(nameEd1) # 设置为伙伴关系， 按“Alt+N”可以切换到nameEd1文本框

import sys
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *


class MyLabelWindow(QDialog):
    def __init__(self):
        super().__init__()
        #self.resize(800, 600)
        self.setWindowIcon(QIcon("./pyqt5/images/circel_btn_tap.png"))
        self.setWindowTitle("QLabel标签快捷键使用")
        screen = QDesktopWidget().screenGeometry()
        size = self.geometry()
        self.move((screen.width() - size.width())/2, (screen.height() - size.height())/2)
        self.initUI()

    def initUI(self):
        nameLb1 = QLabel('&Name', self)
        nameEd1 = QLineEdit(self)
        nameLb1.setBuddy(nameEd1)   # 设置为伙伴关系， 按“Alt+N”可以切换到nameEd1文本框

        nameLb2 = QLabel('&Password', self)
        nameEd2 = QLineEdit(self)
        nameLb2.setBuddy(nameEd2)

        btnOk = QPushButton('&Ok')
        btnCancel = QPushButton('&Cancel')

        mLayout = QGridLayout(self)
        mLayout.addWidget(nameLb1, 0, 0)
        mLayout.addWidget(nameEd1, 0, 1, 1,2)

        mLayout.addWidget(nameLb2, 1, 0)
        mLayout.addWidget(nameEd2, 1, 1, 1,2)
        mLayout.addWidget(btnOk, 2, 1)
        mLayout.addWidget(btnCancel, 2, 2)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = MyLabelWindow()
    win.show()
    sys.exit(app.exec_())