PyQt5 QColorDialog – 如何执行它？

在本文中，我们将看到如何执行 QColorDialog 小部件，执行意味着打开它。打开 QColorDialog 基本上有两种方式，一种是调用getColor方法，这是一种静态方式，每次都会打开 QColorDialog 的新实例，这种方式对快速使用很有用，但不是首选。第二种方法是通过执行它， QColorDialog的样子。

为了做到这一点，我们使用exec_()方法和 QColorDialog 对象

Syntax : dialog.exec_()

Argument : It takes no argument

Action Performed : It opens the QColorDialog widget

编程需要懂一点英语

下面是实现

# importing libraries
from PyQt5.QtWidgets import * 
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import * 
from PyQt5.QtCore import * 
import sys
  
  
class Window(QMainWindow):
  
    def __init__(self):
        super().__init__()
  
        # setting title
        self.setWindowTitle("Python ")
  
        # setting geometry
        self.setGeometry(100, 100, 500, 400)
  
        # calling method
        self.UiComponents()
  
        # showing all the widgets
        self.show()
  
  
    # method for components
    def UiComponents(self):
  
        # creating a QColorDialog object
        dialog = QColorDialog(self)
  
        # executing the dialog
        dialog.exec_()
  
  
        # creating label to display the color
        label = QLabel("GfG", self)
  
        # setting geometry to the label
        label.setGeometry(100, 100, 200, 60)
  
        # making label multi line
        label.setWordWrap(True)
  
        # setting stylesheet of the label
        label.setStyleSheet("QLabel"
                            "{"
                            "border : 5px solid black;"
                            "}")
  
        color = Qt.green
  
        # setting graphic effect to the label
        graphic = QGraphicsColorizeEffect(self)
  
        # setting color to the graphic
        graphic.setColor(color)
  
        # setting graphic to the label
        label.setGraphicsEffect(graphic)
  
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出：