Question

我已经搜索过，并尝试在我的应用程序中使用Tkinter中的.after命令，但我没有做任何事情来解决这个问题。无论我尝试做什么，我试图延迟的两个盒子同时出现。

submenu.add_command(label="View High Score", command=lambda: check_hs_file())

def check_hs_file():
    hs_file = 'highscore.txt'
    PATH = ('highscore.txt')
    if os.path.isfile(PATH):
        get_hs_as_int()
        #go to main function
    else:
        with open(hs_file, 'w') as hs_file:
            hs_file.write('0')
        if os.path.isfile(PATH):
            toplevel1 = Toplevel()
            toplevel1.title("High Score!")
            toplevel1.focus_set()
            hs_textbox = Text(toplevel1, height=2, width=50)
            hs_textbox.pack()
            hs_textbox.insert(END, "You don't have a high score yet.. Creating file!\n")
            get_hs_as_int()
        else:
            toplevel = Toplevel()
            toplevel.title("High Score!")
            toplevel.focus_set()
            hs_textbox = Text(toplevel, height=2, width=50)
            hs_textbox.pack()
            hs_textbox.after(3000)
            hs_textbox.insert(END, "Something went wrong, we could not create a file to keep your high score!")

def get_hs_as_int():
    hs_file = 'highscore.txt'
    with open(hs_file, 'r') as hs_file:
        high_score = hs_file.read()
        high_score = int(high_score)
    toplevel = Toplevel()
    toplevel.after(4000)
    toplevel.title("High Score!")
    toplevel.focus_set()
    hs_textbox = Text(toplevel, height=2, width=50)
    hs_textbox.pack()
    hs_textbox.insert(END, "Your high score is: {}".format(high_score))

同样，打印高分的方框和检查是否有高分的方框同时出现。无论我在哪里添加.after到我的代码。真的很感激任何帮助！

Answer 1

Tk.Widget.after的通常语法将回调函数作为参数。

因此，要使用小片段作为示例，您可以写：

def method(...):
    ... # calculate the meaning of life

    def callback():
        print("I'm called later!")

    self.after(10, callback)  # execute callback() after 10s

更常见的是，你要做的是在类或模块中定义另一个函数或方法，然后在指定的时间之后传递给它。

因此，例如，如果您希望在窗口出现后不久显示弹出窗口，则可能会执行以下操作：

class Controller():
    def __init__(self, master):
        # perform some initial setup

        master.after(5, self.finalise)  # run self.finalise() after 5s

        # do some more setup

    def finalise(self):
        tk.messagebox.showinfo('Called later', 'Yippeeeeeee!')

无法获得.after命令在Tkinter中工作

1 个答案: