Question

运行以下代码时，该框快速出现并自动关闭。作业系统：Windows 10，Python3.6 有人可以帮我理解为什么会这样吗？

import sys, random, string, base64,time, calendar, io, threading, wx

try:
    #Python 2.7
    import thread
except ImportError:
    #python 3.xx
    import _thread as thread

class gameUI(wx.Frame):
    def __init__(self):
        self._rows = 0
        self._columns = 0
        self._user = None
        app = wx.App()
        wx.Frame.__init__(self, None, wx.ID_ANY, "Button Tutorial")
        panel = wx.Panel(self, wx.ID_ANY)
        button = wx.Button(panel, id=wx.ID_ANY, label="Press Me")
        button.Bind(wx.EVT_BUTTON, self.onButton)

    def onButton(self, event):
        """
        This method is fired when its corresponding button is pressed
        """
        print ("Button pressed!")

def main():
    # try:
        # app = wx.App()
        # frame = wx.Frame(None, title='Simple application')
        # frame.Show()
        # time.sleep(10)
        # app.MainLoop()
    try:
        frame = gameUI()
        frame.Show()
        time.sleep(10)
        app.MainLoop()
    finally:
        del app
if __name__ == '__main__':
    main()

Answer 1

在创建任何窗口之前，应先创建一个wx.App。
无需尝试使用finally删除应用程序，当所有窗口关闭时，垃圾收集器将删除该应用程序。
时间尚未导入，因此会出错，但您并不是真的要等待10秒才能使窗口响应，最好将其删除。

import wx


class gameUI(wx.Frame):

    def __init__(self):
        self._rows = 0
        self._columns = 0
        self._user = None
#         app = wx.App() dont create app here
        wx.Frame.__init__(self, None, wx.ID_ANY, "Button Tutorial")
        panel = wx.Panel(self, wx.ID_ANY)
        button = wx.Button(panel, id=wx.ID_ANY, label="Press Me")
        button.Bind(wx.EVT_BUTTON, self.onButton)

    def onButton(self, event):
        """
        This method is fired when its corresponding button is pressed
        """
        print ("Button pressed!")


def main():

#     try:
    app = wx.App()
    frame = gameUI()
    frame.Show()
#     time.sleep(10)
    app.MainLoop()


#     finally:
#         del app not required
if __name__ == '__main__':
    main()

Answer 2

您仍然有问题。

在MainLoop开始之前，GUI不会显示，因此sleep命令在错误的位置，如果将其放在MainLoop之后，它将不会激活直到Gui关闭，即MainLoop终止。
wx.App的定义仍然不在通常的位置和位置是，它仍然必须声明为self.app，并且仍然必须称为frame.app。
由于您可能是wxpython的新手，因此您没有使用sizers进行小部件定位，因此必须给每个小部件至少一个位置（如果没有大小的话）（它们会尝试自行调整大小）。

尝试下面的代码，并注意区别。

import sys, random, string, base64,time, calendar, io, threading, wx

try:
    #Python 2.7
    import thread
except ImportError:
    #python 3.xx
    import _thread as thread

class gameUI(wx.Frame):
    def __init__(self,parent,title):
        self._rows = 0
        self._columns = 0
        self._user = None
        wx.Frame.__init__(self, None, wx.ID_ANY, "Button Tutorial")
        panel = wx.Panel(self, wx.ID_ANY)
        button = wx.Button(panel, id=wx.ID_ANY, label="Press Me", pos=(20,20), size=(80,25))
        quit = wx.Button(panel, id=wx.ID_ANY, label="Quit", pos=(20,50), size=(80,25))
        button.Bind(wx.EVT_BUTTON, self.onButton)
        quit.Bind(wx.EVT_BUTTON, self.onQuit)

    def onButton(self, event):
        """
        This method is fired when its corresponding button is pressed
        """
        print ("Button pressed!")

    def onQuit(self, event):
        self.Destroy()

def main():
    try:
        app = wx.App()
        frame = gameUI(None, title='Simple application')
        frame.Show()
        app.MainLoop()
    finally:
        del app
if __name__ == '__main__':
    main()

Wx框架自动关闭

2 个答案: