Python 多个WindowsBaloonTip/TrayTip通知？

如果您使用下面的代码在通知区域中创建TrayTips（BaloonTips），您会注意到它只允许一条消息，然后被卡住并出错

代码取自：

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如您所见，如果尝试将多个气球提示发送到WindowsBallootTip类，您将收到以下错误：

File "C:/WindowsBalloonTip.py", line 20, in __init__
    classAtom = RegisterClass(wc)
error: (1410, 'RegisterClass', 'Class already exists.')

查看Microsoft的

RegisterClass

文档，您还需要使用

UnregisterClass（lpClassName，hInstance）

我们可以通过添加：

classAtom=UnregisterClass（classAtom，hinst）

来实现这一点，但必须在销毁窗口后添加它，例如，这里是一个固定的完整版本

# -- coding: utf-8 --

from win32api import *
from win32gui import *
import win32con
import sys, os
import struct
import time

# Class
class WindowsBalloonTip:
    def __init__(self, title, msg):
        message_map = { win32con.WM_DESTROY: self.OnDestroy,}

        # Register the window class.
        wc = WNDCLASS()
        hinst = wc.hInstance = GetModuleHandle(None)
        wc.lpszClassName = 'PythonTaskbar'
        wc.lpfnWndProc = message_map # could also specify a wndproc.
        classAtom = RegisterClass(wc)

        # Create the window.
        style = win32con.WS_OVERLAPPED | win32con.WS_SYSMENU
        self.hwnd = CreateWindow(classAtom, "Taskbar", style, 0, 0, win32con.CW_USEDEFAULT, win32con.CW_USEDEFAULT, 0, 0, hinst, None)
        UpdateWindow(self.hwnd)

        # Icons managment
        iconPathName = os.path.abspath(os.path.join( sys.path[0], 'balloontip.ico' ))
        icon_flags = win32con.LR_LOADFROMFILE | win32con.LR_DEFAULTSIZE
        try:
            hicon = LoadImage(hinst, iconPathName, win32con.IMAGE_ICON, 0, 0, icon_flags)
        except:
            hicon = LoadIcon(0, win32con.IDI_APPLICATION)
        flags = NIF_ICON | NIF_MESSAGE | NIF_TIP
        nid = (self.hwnd, 0, flags, win32con.WM_USER+20, hicon, 'Tooltip')

        # Notify
        Shell_NotifyIcon(NIM_ADD, nid)
        Shell_NotifyIcon(NIM_MODIFY, (self.hwnd, 0, NIF_INFO, win32con.WM_USER+20, hicon, 'Balloon Tooltip', msg, 200, title))
        # self.show_balloon(title, msg)
        time.sleep(5)

        # Destroy
        DestroyWindow(self.hwnd)
        classAtom = UnregisterClass(classAtom, hinst)
    def OnDestroy(self, hwnd, msg, wparam, lparam):
        nid = (self.hwnd, 0)
        Shell_NotifyIcon(NIM_DELETE, nid)
        PostQuitMessage(0) # Terminate the app.

# Function
def balloon_tip(title, msg):
    w=WindowsBalloonTip(title, msg)

# Main
if __name__ == '__main__':
    # Example
    balloon_tip('Lorem Ipsum', 'Neque porro quisquam est qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit...')
    balloon_tip('Example two', 'There is no one who loves pain itself, who seeks after it and wants to have it, simply because it is pain...')

图标加载在某些操作系统上存在问题，因此如果您想要自己的自定义图标，请更改此行：

iconPathName = os.path.abspath(os.path.join( sys.path[0], 'balloontip.ico' ))

例如：

iconPathName = "C:\myfolder\myicon.ico"

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在尝试从新线程中注销类之前，这对[我]也是有效的。。。有什么想法吗？[代表同事发表评论]有没有办法让消息在windows 10操作中心中持久化？

iconPathName = "C:\myfolder\myicon.ico"