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在这篇博客中，我们将使用 PyQt5 创建一个简单的七彩数字时钟。

效果

代码解析

定义 RainbowClockWindow 类

class RainbowClockWindow(QMainWindow):def __init__(self):super().__init__()self.setWindowTitle('Rainbow Digital Clock')self.setGeometry(100, 100, 400, 200)self.initUI()

初始化用户界面

    def initUI(self):layout = QVBoxLayout()self.time_layout = QHBoxLayout()self.time_layout.setSpacing(0)  # 设置标签之间的间距为0self.hour_label = QLabel(self)self.hour_label.setAlignment(Qt.AlignCenter)self.hour_label.setStyleSheet("font-size: 48px;")self.colon1_label = QLabel(self)self.colon1_label.setAlignment(Qt.AlignCenter)self.colon1_label.setStyleSheet("font-size: 48px;")self.colon1_label.setText(":")self.minute_label = QLabel(self)self.minute_label.setAlignment(Qt.AlignCenter)self.minute_label.setStyleSheet("font-size: 48px;")self.colon2_label = QLabel(self)self.colon2_label.setAlignment(Qt.AlignCenter)self.colon2_label.setStyleSheet("font-size: 48px;")self.colon2_label.setText(":")self.second_label = QLabel(self)self.second_label.setAlignment(Qt.AlignCenter)self.second_label.setStyleSheet("font-size: 48px;")self.time_layout.addWidget(self.hour_label)self.time_layout.addWidget(self.colon1_label)self.time_layout.addWidget(self.minute_label)self.time_layout.addWidget(self.colon2_label)self.time_layout.addWidget(self.second_label)layout.addLayout(self.time_layout)layout.setAlignment(Qt.AlignCenter)  # 居中对齐container = QWidget()container.setLayout(layout)self.setCentralWidget(container)timer = QTimer(self)timer.timeout.connect(self.showTime)timer.start(1000)self.showTime()

• 创建一个垂直布局 QVBoxLayout 和一个水平布局 QHBoxLayout，并设置水平布局的标签间距为0。
• 创建五个标签：hour_label、colon1_label、minute_label、colon2_label 和
  second_label，并设置标签的对齐方式和样式，使其在窗口中居中并且字体大小为 48 像素。
• 将五个标签添加到水平布局中。
• 将水平布局添加到垂直布局中，并设置垂直布局居中对齐。
• 创建一个容器 QWidget，将布局设置为该容器的布局，并将容器设置为主窗口的中央控件。
• 创建一个 QTimer 对象，每秒触发一次 timeout 事件，连接到 showTime 方法。
• 调用 showTime 方法显示当前时间。

显示时间方法

    def showTime(self):current_time = QTime.currentTime()hour = current_time.toString('hh')minute = current_time.toString('mm')second = current_time.toString('ss')# Generate random colors for hour, minute, and secondhour_color = QColor(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))minute_color = QColor(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))second_color = QColor(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))self.hour_label.setText(hour)self.hour_label.setStyleSheet(f"font-size: 48px; color: {hour_color.name()};")self.minute_label.setText(minute)self.minute_label.setStyleSheet(f"font-size: 48px; color: {minute_color.name()};")self.second_label.setText(second)self.second_label.setStyleSheet(f"font-size: 48px; color: {second_color.name()};")# Colon colorsself.colon1_label.setStyleSheet(f"font-size: 48px; color: #000000;")self.colon2_label.setStyleSheet(f"font-size: 48px; color: #000000;")

• showTime 方法获取当前时间并将其格式化为小时、分钟和秒。
• 为小时、分钟和秒生成随机颜色，并将这些颜色应用到相应的标签上。
• 将两个冒号标签的颜色固定为黑色。

完整代码

import sys
import random
from PyQt5.QtWidgets import QApplication, QMainWindow, QLabel, QHBoxLayout, QVBoxLayout, QWidget
from PyQt5.QtCore import QTimer, QTime, Qt
from PyQt5.QtGui import QColorclass RainbowClockWindow(QMainWindow):def __init__(self):super().__init__()self.setWindowTitle('Rainbow Digital Clock')self.setGeometry(100, 100, 400, 200)self.initUI()def initUI(self):layout = QVBoxLayout()self.time_layout = QHBoxLayout()self.time_layout.setSpacing(0)  # 设置标签之间的间距为0self.hour_label = QLabel(self)self.hour_label.setAlignment(Qt.AlignCenter)self.hour_label.setStyleSheet("font-size: 48px;")self.colon1_label = QLabel(self)self.colon1_label.setAlignment(Qt.AlignCenter)self.colon1_label.setStyleSheet("font-size: 48px;")self.colon1_label.setText(":")self.minute_label = QLabel(self)self.minute_label.setAlignment(Qt.AlignCenter)self.minute_label.setStyleSheet("font-size: 48px;")self.colon2_label = QLabel(self)self.colon2_label.setAlignment(Qt.AlignCenter)self.colon2_label.setStyleSheet("font-size: 48px;")self.colon2_label.setText(":")self.second_label = QLabel(self)self.second_label.setAlignment(Qt.AlignCenter)self.second_label.setStyleSheet("font-size: 48px;")self.time_layout.addWidget(self.hour_label)self.time_layout.addWidget(self.colon1_label)self.time_layout.addWidget(self.minute_label)self.time_layout.addWidget(self.colon2_label)self.time_layout.addWidget(self.second_label)layout.addLayout(self.time_layout)layout.setAlignment(Qt.AlignCenter)  # 居中对齐container = QWidget()container.setLayout(layout)self.setCentralWidget(container)timer = QTimer(self)timer.timeout.connect(self.showTime)timer.start(1000)self.showTime()def showTime(self):current_time = QTime.currentTime()hour = current_time.toString('hh')minute = current_time.toString('mm')second = current_time.toString('ss')# Generate random colors for hour, minute, and secondhour_color = QColor(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))minute_color = QColor(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))second_color = QColor(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))self.hour_label.setText(hour)self.hour_label.setStyleSheet(f"font-size: 48px; color: {hour_color.name()};")self.minute_label.setText(minute)self.minute_label.setStyleSheet(f"font-size: 48px; color: {minute_color.name()};")self.second_label.setText(second)self.second_label.setStyleSheet(f"font-size: 48px; color: {second_color.name()};")# Colon colorsself.colon1_label.setStyleSheet(f"font-size: 48px; color: #000000;")self.colon2_label.setStyleSheet(f"font-size: 48px; color: #000000;")if __name__ == "__main__":app = QApplication(sys.argv)window = RainbowClockWindow()window.show()sys.exit(app.exec_())