快速摘要：選擇圖像時應該更改綠色按鈕，但事實并非如此：我有一個window-A帶有按鈕的 Tkinter，按下該按鈕時將使用單獨的 Python 文件創建一個新的window-B. Window-B有兩個按鈕：新屏幕截圖或從文件夾中選擇圖像。用于此的方法應該會更改self.image_selected，以便它可用于更新按鈕window-A以具有此新圖像。我已經嘗試了下面的兩行代碼，但都沒有用。我也沒有收到任何錯誤： self.button.configure(image = img.image_selected) # first try self.button['image'] = img.image_selected # second try這是我的代碼（為清楚起見進行了簡化）：import tkinter as tkimport get_image_or_snipclass ButtonImg: def __init__(self, master): self.newWindow = None self.master = master self.title = "My Minimum Reproducible Example" self.fontA = ("arial", 20, "bold") self.canvas = tk.Canvas(height = 5) self.canvas.pack() self.button = tk.Button(bg="#93d9cc", height = 5, text = "Select Image", font = self.fontA, command = self.changeImage) self.button.pack(fill="both") def changeImage(self): self.newWindow = tk.Toplevel(self.master) img = get_image_or_snip.AcquireImage(self.newWindow) self.button.configure(image = img.image_selected) #self.button['image'] = img.image_selectedroot = tk.Tk()app = ButtonImg(root)root.mainloop()這是前面提到的get_image_or_snip.py代碼：import tkinter as tkfrom tkinter import filedialogfrom PIL import ImageTk, Imageimport snipping_tool
1 回答
暮色呼如
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print()如果你在之前和之后get_image_or_snip.AcquireImage(self.newWindow)添加，changeImage()那么你應該只看到第一個文本，因為你運行第二個mainloop()并且它永遠不會結束這個循環并且永遠不會返回changeImage()并且永遠不會運行self.button.configure(image=img.image_selected)
你應該只使用一個mainloop()并最終使用
root.wait_window(self.newWindow)
等到你關閉第二個窗口然后它就會運行self.button.configure(image=img.image_selected)
但還有其他問題。
當第二個窗口被銷毀時，它會從內存中刪除圖像，因此您必須將其分配給第一個窗口中的變量。
當您發送文本時，按鈕使用字符高度，但是當您分配圖像時，它使用以像素為單位的高度，您必須將其從更改為5image.height()`
一個文件中的所有代碼
import tkinter as tk
from tkinter import filedialog
from PIL import ImageTk
class AcquireImage:
def __init__(self, master):
self.master = master
self.fontA = ("arial", 20, "bold")
self.frame = tk.Frame(master, bg="#1B2631")
self.frame.pack(fill="both", expand=True)
self.button1 = tk.Button(self.frame, text="Select Image File", padx=10, pady=10, bg="#d9a193",
font=self.fontA, command=lambda:self.show_dialogs(1))
self.button1.grid(row=0, column=0, sticky="nsew")
self.button2 = tk.Button(self.frame, text="Get Screen Snip", padx=10, pady=10, bg="#d9a193",
font=self.fontA, command=lambda:self.show_dialogs(2))
self.button2.grid(row=0, column=1, sticky="nsew")
self.image_selected = None
def show_dialogs(self, method):
if method == 1:
ret = filedialog.askopenfilename(initialdir='/home/user/images/')
if ret:
self.image_selected = ImageTk.PhotoImage(file=ret)
self.master.destroy()
elif method == 2:
self.image_selected = snipping_tool.get_snip()
class ButtonImg:
def __init__(self, master):
self.newWindow = None
self.master = master
self.title = "My Minimum Reproducible Example"
self.fontA = ("arial", 20, "bold")
self.canvas = tk.Canvas(height=5)
self.canvas.pack()
self.button = tk.Button(bg="#93d9cc", height=5, text="Select Image",
font=self.fontA, command=self.changeImage)
self.button.pack(fill="both")
def changeImage(self):
print('open second window')
self.newWindow = tk.Toplevel(self.master)
img = AcquireImage(self.newWindow)
self.master.wait_window(self.newWindow)
print('close second window')
if img.image_selected: # check if image was selected
self.image = img.image_selected
self.button.configure(image=self.image, height=self.image.height())
root = tk.Tk()
app = ButtonImg(root)
root.mainloop()
順便說一句：如果你想在不關閉第二個窗口的情況下更改圖像，那么你應該將第一個窗口（或第一個窗口中的按鈕）作為參數發送給第二個窗口并更改圖像show_dialogs()
import tkinter as tk
from tkinter import filedialog
from PIL import ImageTk
class AcquireImage:
def __init__(self, master, first_window):
self.master = master
self.first_window = first_window
self.fontA = ("arial", 20, "bold")
self.frame = tk.Frame(master, bg="#1B2631")
self.frame.pack(fill="both", expand=True)
self.button1 = tk.Button(self.frame, text="Select Image File", padx=10, pady=10, bg="#d9a193",
font=self.fontA, command=lambda:self.show_dialogs(1))
self.button1.grid(row=0, column=0, sticky="nsew")
self.button2 = tk.Button(self.frame, text="Get Screen Snip", padx=10, pady=10, bg="#d9a193",
font=self.fontA, command=lambda:self.show_dialogs(2))
self.button2.grid(row=0, column=1, sticky="nsew")
self.image_selected = None
def show_dialogs(self, method):
if method == 1:
ret = filedialog.askopenfilename(initialdir='/home/user/images/')
if ret:
self.image_selected = ImageTk.PhotoImage(file=ret)
self.first_window.image = self.image_selected
self.first_window.button.configure(image=self.first_window.image, height=self.first_window.image.height())
elif method == 2:
self.image_selected = snipping_tool.get_snip()
class ButtonImg:
def __init__(self, master):
self.newWindow = None
self.master = master
self.title = "My Minimum Reproducible Example"
self.fontA = ("arial", 20, "bold")
self.canvas = tk.Canvas(height=5)
self.canvas.pack()
self.button = tk.Button(bg="#93d9cc", height=5, text="Select Image",
font=self.fontA, command=self.changeImage)
self.button.pack(fill="both")
def changeImage(self):
self.newWindow = tk.Toplevel(self.master)
img = AcquireImage(self.newWindow, self) # first window as `self` but you can send `self.button`
root = tk.Tk()
app = ButtonImg(root)
root.mainloop()
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