如何在CustomTkinter窗口中实现实时更新的时钟？

你需要在CustomTkinter窗口中实现实时更新的时钟，当前代码仅能显示一次时间，无法自动刷新。以下是修改后的完整代码，实现日期和时间的实时更新：

from configparser import ConfigParser
import sys
from tkinter.messagebox import askyesno
import customtkinter
import datetime
from datetime import datetime, timedelta
import subprocess

customtkinter.set_appearance_mode("System")  # 模式: "System" (默认), "Dark", "Light"
customtkinter.set_default_color_theme("blue")  # 主题: "blue" (默认), "green", "dark-blue"

normal_text_color = "gray10"
disabled_text_color = "light slate gray"
alert_color = "red"
start_color = "green"
manual_color = "blue"
option_color1 = "purple3"
option_color2 = "purple1"

class App(customtkinter.CTk):
    def __init__(self):
        super().__init__()

        global normal_text_color
        global disabled_text_color
        global alert_color
        global start_color
        global manual_color
        global option_color1
        global option_color2

        r = 0
        c = 0
        stick = ""
        padderx = 0

        # configure window
        self.title("test")
        self.geometry(f"{750}x{385}")

        # configure grid layout (4x4)
        self.grid_columnconfigure(1, weight=1)
        self.grid_columnconfigure((2, 3), weight=0)
        self.grid_rowconfigure((0, 1, 2, 5), weight=1)

        # create sidebar frame with widgets
        self.sidebar_frame = customtkinter.CTkFrame(self, width=140, corner_radius=0)
        self.sidebar_frame.grid(row=0, column=0, rowspan=9, sticky="nsew")
        self.sidebar_frame.grid_rowconfigure(9, weight=1)
        self.logo_label = customtkinter.CTkLabel(self.sidebar_frame, text="Controls", font=customtkinter.CTkFont(size=20, weight="bold"))
        self.logo_label.grid(row=0, column=0, padx=20, pady=(20, 10))

        self.sidebar_button_1 = customtkinter.CTkButton(self.sidebar_frame, command=lambda: self.sidebar_button_event(1))
        self.sidebar_button_1.grid(row=1, column=0, padx=20, pady=10)

        self.sidebar_button_2 = customtkinter.CTkButton(self.sidebar_frame, command=lambda: self.sidebar_button_event(2))
        self.sidebar_button_2.grid(row=2, column=0, padx=20, pady=10)

        self.logo_label = customtkinter.CTkLabel(self.sidebar_frame, text="Options", font=customtkinter.CTkFont(size=20, weight="bold"))
        self.logo_label.grid(row=3, column=0, padx=20, pady=0)

        self.sidebar_button_3 = customtkinter.CTkButton(self.sidebar_frame, command=lambda: self.sidebar_button_event(3))
        self.sidebar_button_3.grid(row=4, column=0, padx=20, pady=20)

        self.sidebar_button_4 = customtkinter.CTkButton(self.sidebar_frame, command=lambda: self.sidebar_button_event(4))
        self.sidebar_button_4.grid(row=5, column=0, padx=20, pady=20)

        self.sidebar_button_5 = customtkinter.CTkButton(self.sidebar_frame, command=lambda: self.sidebar_button_event(5))
        self.sidebar_button_5.grid(row=6, column=0, padx=20, pady=10)

        # create current_view for operations
        self.current_view = customtkinter.CTkFrame(self, width=100, fg_color="transparent")
        self.current_view.grid(row=0, column=1, rowspan=9, sticky="nsew")
        self.current_view.grid_columnconfigure((0, 1, 2, 3), weight=1)
        self.current_view.grid_rowconfigure(5, weight=1)

        # Show current operation
        self.current_label = customtkinter.CTkLabel(self.current_view, text="Current Operations", font=customtkinter.CTkFont(size=20, weight="bold"))
        self.current_label.grid(row=0, column=0, sticky="e", padx=20, pady=(20, 10))

        # 初始化时钟标签（关键：提前创建标签，后续仅更新文本）
        self.date_label = customtkinter.CTkLabel(self.current_view, font=customtkinter.CTkFont(size=20, weight="bold"))
        self.date_label.grid(row=0, column=2, sticky="w", padx=20, pady=(0, 0))
        
        self.time_label = customtkinter.CTkLabel(self.current_view, font=customtkinter.CTkFont(size=20, weight="bold"))
        self.time_label.grid(row=2, column=2, sticky="w", padx=20, pady=(0, 0))

        # set operation labels
        self.operations()
        self.operation_values()

        # create feeding log textbox
        font=('Courier', 14)
        self.log_view = customtkinter.CTkTextbox(self, font=font, width=100)
        self.log_view.grid(row=8, column=1, padx=(20, 10), pady=(20, 10), sticky="nsew")
        self.log_view.tag_config("normal", foreground=normal_text_color)
        self.log_view.tag_config("start", foreground=start_color)
        self.log_view.tag_config("warn", foreground=alert_color)
        self.log_view.tag_config("disable", foreground=disabled_text_color)
        self.log_view.tag_config("manual", foreground=manual_color)
        self.log_view.tag_config("option1", foreground=option_color1)
        self.log_view.tag_config("option2", foreground=option_color2)

        # Configure the button names
        self.sidebar_button_1.configure(text="A")
        self.sidebar_button_2.configure(text="B")
        self.sidebar_button_3.configure(text="C")
        self.sidebar_button_4.configure(text="D")
        self.sidebar_button_4.configure(state="disabled")
        self.sidebar_button_5.configure(text="Quit")

        # 启动时钟更新
        self.update_clock()

    # sets the operation type label only
    def operations(self):
        global normal_text_color
        global disabled_text_color
        global alert_color
        global start_color
        global manual_color

        # set Auto Feed label
        r = 1
        c = 0
        stick = "e"
        padderx = 20
        current_text_color = normal_text_color
        text_text = "Auto:"
        self.update_labels(current_text_color, text_text, r, c, stick, padderx )

        # next Feeding
        r += 1
        current_text_color = normal_text_color
        text_text = "Begin Next:"
        self.update_labels(current_text_color, text_text, r, c, stick, padderx )

        # hourly feeding
        r += 1
        current_text_color = normal_text_color
        text_text = "Hourly:"
        self.update_labels(current_text_color, text_text, r, c, stick, padderx )

        # how many feeding times per day.
        r += 1
        current_text_color = normal_text_color
        text_text = "Per Day:"
        self.update_labels(current_text_color, text_text, r, c, stick, padderx )

    # sets the operation type value only
    def operation_values(self):
        global normal_text_color
        global disabled_text_color
        global alert_color
        global start_color
        global manual_color

        r = 1
        c = 1
        stick = "w"
        padderx = 0

        # auto feed
        text_text = "On "
        current_text_color = start_color
        self.update_labels(current_text_color, text_text, r, c, stick, padderx)

        # when is the next feeding?
        r += 1
        text_text = "5:35 PM"
        current_text_color = start_color
        self.update_labels(current_text_color, text_text, r, c, stick, padderx )

        # hourly feeding
        r += 1
        text_text = "Off    "
        current_text_color = alert_color
        self.update_labels(current_text_color, text_text, r, c, stick, padderx )

        # if auto_feed is on, and hourly_feed is off, then display the number of times per day fed
        r += 1
        text_text = "Off"
        current_text_color = alert_color
        self.update_labels(current_text_color, text_text, r, c, stick, padderx )

    # updates a label.
    def update_labels(self, set_text_color, set_text, r, c, stick, pad_it ):
        self.current_label = customtkinter.CTkLabel(self.current_view, text_color=set_text_color,
                                                    text=set_text, font=customtkinter.CTkFont(size=20, weight="bold"))
        self.current_label.grid(row=r, column=c, padx=pad_it, sticky=stick)

    # Handle the buttons
    def sidebar_button_event(self, buttonNum):
        if buttonNum == 5:
            sys.exit(0)

    # 更新时钟文本
    def update_clock(self):
        now = datetime.now()
        # 更新日期标签
        self.date_label.configure(text=now.strftime("%m/%d/%Y"))
        # 更新时间标签
        self.time_label.configure(text=now.strftime("%-I:%M %p"))
        # 每隔1000毫秒（1秒）调用一次自身，实现循环更新
        self.after(1000, self.update_clock)

if __name__ == "__main__":
    app = App()
    app.mainloop()

关键修改说明 #

• 初始化时钟标签：在__init__方法中提前创建date_label和time_label，避免每次更新都新建组件，造成界面冗余。
• 修改更新逻辑：将原clock方法改为update_clock，仅更新已有标签的文本内容，而非重新创建标签。
• 定时触发更新：使用Tkinter（CustomTkinter基于Tkinter）的after方法，每隔1秒调用一次update_clock，实现实时刷新。

内容的提问来源于stack exchange，提问作者Greg W