Question

我想创建一个永远运行的程序，并且每隔10秒刷新一次信息。

我得到的最佳解决方案是：

while True:

    Gui= GUI()
    Gui.after(2000, lambda : Gui.destroy())
    Gui.mainloop()

但是这导致了窗口关闭并产生了可怕的效果。这是我的代码：我想在修改json文件时刷新页面，窗口不应该关闭。

from tkinter import *
import json
import time

def openfile():
    data = []
    d={}
    return_listas = []
    with open('test.json', 'r') as f:
        for line in f:
            data.append(json.loads(line))

        for item in data:

            d.update(item)
        f.close()
        return d

class GUI(Tk):
    def __init__(self):
        self.tk = Tk()
        self.tk.wm_state('zoomed')
        self.label = {}
        self.topFrame = Frame(self.tk)
        self.topFrame.pack(side=TOP,fill=Y)
        self.task()

    def task(self):
        i = 0
        list = openfile()
        for ele in list:

            if list[ele]=="true":
                lb = Label(self.topFrame, text=ele+"\n", fg="green",font=("Helvetica", 24))
            if list[ele]=="false":
                lb = Label(self.topFrame, text=ele+"\n", fg="red",font=("Helvetica", 24))
            lb.pack(fill=X) 

            self.label[ele] = lb


        i += 1

UPDATE，现在我有问题，我不能保持可刷新的信息，它要么叠加，要么根本不显示

Answer 1

您不必每次都删除它，只需更新。这是你GUI课程：

class GUI(Tk):
    def __init__(self):
        self.tk = Tk()
        self.tk.wm_state('zoomed')
        self.topFrame = Frame(self.tk)
        self.topFrame.pack(side=TOP,fill=Y)
        self.label = Label(self.topFrame, fg="green",font=("Helvetica", 24))                    # This will be the label that is updated
        self.label.pack(fill=X) 
        self.tk.after(1000, self.task)              # in 1 second it will start the loop

    def task(self):
        list = openfile()
        for ele in list:

            if list[ele]=="true":
                self.label.configure(text = ele+"\n", fg = 'green')
            if list[ele]=="false":
                self.label.configure(text = ele+"\n", fg = 'red')

        self.tk.after(1000, self.task)              # in 1 second it will go again

gui = GUI()
gui.mainloop()

Answer 2

我所要做的就是删除旧标签

for ele in self.label:
    self.label[ele].destroy()
self.label= {}

创建可刷新的tkinter窗口而不关闭

2 个答案: