PhotoImage Tkinter 问题：按钮不工作且不显示

Question

我正在使用 Proxlight Designer 创建拖放式 GUI。这是一个与 open-cv-python 一起使用的应用程序，但未显示 Button。似乎 open-cv 是问题所在，因为如果删除它，Button 将显示并正常工作。这是 GUI 的代码：

cap = cv2.VideoCapture(0)

window = Tk()
window.geometry("700x800")
window.configure(bg = "#ffffff")
canvas = Canvas(
    window,
    bg = "#ffffff",
    height = 800,
    width = 700,
    bd = 0,
    highlightthickness = 0,
    relief = "ridge")
canvas.place(x = 0, y = 0)

l1 = Label(bg = "black")
l1.place(x = 100, y = 150, width = 500, height = 500)

img0 = PhotoImage(file = f"RES/img1.png")
b0 = Button(
    image = img0,
    borderwidth = 0,
    highlightthickness = 0,
    command = save_face,
    relief = "flat")

b0.place(
    x = 250, y = 693,
    width = 200,
    height = 75)

img1 = PhotoImage(file = f"RES/img2.png")

b1 = Button(
    image = img1,
    borderwidth = 0,
    highlightthickness = 0,
    command = encryptPass,
    relief = "flat")

b1.place(
    x = 480, y = 693,
    width = 200,
    height = 75)

img2 = PhotoImage(file = f"RES/img3.png")
b2 = Button(
    image = img2,
    borderwidth = 0,
    highlightthickness = 0,
    command = generate_key,
    relief = "flat")

b2.place(
    x = 20, y = 693,
    width = 200,
    height = 75)

window.resizable(False, False)

while True:
    img = cap.read()[1]
    img1 = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
    img = ImageTk.PhotoImage(Image.fromarray(img1))
    l1["image"] = img
    window.update()

Answer 1

所以感谢@Matiiss 和@acw1668 的评论（thx alot btw）我让它工作了。基本上 while 循环是问题所在。我用这个而不是 while 循环修复了它：

cap = cv2.VideoCapture(0, cv2.CAP_DSHOW)

def show_frame():
    _, frame = cap.read()
    global cv2image
    cv2image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
    img = Image.fromarray(cv2image)
    imgtk = ImageTk.PhotoImage(image=img)
    l1.imgtk = imgtk
    l1.configure(image=imgtk)
    l1.after(10, show_frame)

window = Tk()
window.geometry("700x800")
window.configure(bg = "#ffffff")

l1 = Label(bg = "black")
l1.place(x = 100, y = 150, width = 500, height = 500)

window.resizable(False, False)

show_frame()
window.mainloop()

PhotoImage Tkinter 问题：按钮不工作且不显示

PhotoImage Tkinter problem: Button not working and not displaying

tkinter

python-3.x

photoimage

opencv-python