带有画布的python tkinter不显示图像答案

【问题标题】：python tkinter with canvas not showing images带有画布的python tkinter不显示图像
【发布时间】：2021-12-31 17:27:42
【问题描述】：

从数据库中检索图像并渲染所有图像不显示时，我遇到了“tkinter”和“canvas”问题。调试代码时，所有图像都正常显示，但执行代码时图像不显示在画布中。

    count = 0
    posx = 1
    posy = 5
    for imagem in self.imagens:

        img1 = Image.open(imagem[2])
        img1 = img1.resize((200, 200), Image.ANTIALIAS)
        photoImage = ImageTk.PhotoImage(img1)

        self.canvas.create_image(posy, posx, anchor=NW, image=photoImage)

        count = count + 1
        if count == 9:
            break

        if count == 0 or count == 3 or count == 6:
            posy = 5
        elif count == 1 or count == 4 or count == 7:
            posy = 210
        elif count == 2 or count == 5 or count == 8:
            posy = 415

        if count > 2 and count < 5:
            posx = 205
        elif count > 5 and count < 8:
            posx = 410

【问题讨论】：

这段代码在函数中吗？

标签： python tkinter canvas

【解决方案1】：

这些图像在退出类方法后被垃圾收集（因为您在代码中使用了self）。使用列表（实例变量）来存储这些图像：

    count = 0
    posx = 1
    posy = 5
    self.imagelist = []  # for storing those images
    for imagem in self.imagens:

        img1 = Image.open(imagem[2])
        img1 = img1.resize((200, 200), Image.ANTIALIAS)
        photoImage = ImageTk.PhotoImage(img1)
        self.imagelist.append(photoImage) # save the reference of the image

        self.canvas.create_image(posy, posx, anchor=NW, image=photoImage)

        count = count + 1
        if count == 9:
            break

        if count == 0 or count == 3 or count == 6:
            posy = 5
        elif count == 1 or count == 4 or count == 7:
            posy = 210
        elif count == 2 or count == 5 or count == 8:
            posy = 415

        if count > 2 and count < 5:
            posx = 205
        elif count > 5 and count < 8:
            posx = 410

【讨论】：