点击按钮后清空Tkinter窗口（不关闭）无响应问题排查

你的代码里clearScreen函数用了grid_slaves()来获取控件，但你所有的控件（Label和Button）都是用place()布局的，grid_slaves()只能识别用grid()布局的控件，所以点击按钮后没有任何反应。

修复方案 #

把grid_slaves()替换成winfo_children()，这个方法能获取窗口下的所有子控件，无论使用哪种布局方式。修改后的clearScreen函数如下：

# Clear screen function #
def clearScreen(object):
    screenItem = object.winfo_children()
    for i in screenItem:
        i.destroy()
# --------------------- #

完整修改后的代码 #

# IMPORTS #
import tkinter as tk
# ------- #

# Define Window #
window = tk.Tk()
window.title("Bioinformatics Showcase")
window.geometry("600x400")
# ------------- #

# Clear screen function #
def clearScreen(object):
    screenItem = object.winfo_children()
    for i in screenItem:
        i.destroy()
# --------------------- #

# Event functions #
def startEvent(event):
    clearScreen(window)
# ------- #

# Create Welcome Page #
welcomeLabel = tk.Label(text="Welcome, User! :3")
welcomeLabel.place(relx = .5, rely = .1, anchor = "center")
    # Make start button
startButton = tk.Button(window, text = "Click here to start")
startButton.place(relx = .5, rely = .5, anchor = "center")
    # Bind button to start event
startButton.bind("<Button-1>", startEvent) # <Button-1> is the mouse left click
# ------------------- #

# Main loop keeps window open until user closes it #
window.mainloop()

额外优化建议 #

按钮绑定事件可以直接用command参数，比bind更简洁，修改按钮部分代码：

startButton = tk.Button(window, text = "Click here to start", command=lambda: clearScreen(window))

这样可以去掉startEvent函数，代码更精简。

内容的提问来源于stack exchange，提问作者Mell