tk.canvas创建一个图片浏览器

你可以使用 Tkinter 库中的 Canvas 组件来创建一个简单的图片浏览器。下面是一个示例代码，展示如何通过点击按钮来浏览多张图片：

import tkinter as tk
from PIL import ImageTk, Image

class ImageViewer:
    def __init__(self, root, image_paths):
        self.root = root
        self.image_paths = image_paths
        self.current_image_index = 0

        # 创建 Canvas 组件
        self.canvas = tk.Canvas(root, width=400, height=400)
        self.canvas.pack()

        # 显示第一张图片
        self.display_image()

        # 创建按钮
        prev_button = tk.Button(root, text="Previous", command=self.prev_image)
        prev_button.pack(side=tk.LEFT)

        next_button = tk.Button(root, text="Next", command=self.next_image)
        next_button.pack(side=tk.RIGHT)

    def display_image(self):
        # 清空 Canvas
        self.canvas.delete("all")

        # 打开当前图片
        current_image = Image.open(self.image_paths[self.current_image_index])

        # 调整图片大小以适应 Canvas 大小
        width, height = current_image.size
        if width > 400 or height > 400:
            ratio = min(400/width, 400/height)
            width = int(width * ratio)
            height = int(height * ratio)
            current_image = current_image.resize((width, height), Image.ANTIALIAS)

        # 创建 ImageTk 对象并在 Canvas 中显示
        self.image_tk = ImageTk.PhotoImage(current_image)
        self.canvas.create_image(200, 200, anchor=tk.CENTER, image=self.image_tk)

    def prev_image(self):
        # 更新当前图片索引
        self.current_image_index -= 1
        if self.current_image_index < 0:
            self.current_image_index = len(self.image_paths) - 1

        # 显示更新后的图片
        self.display_image()

    def next_image(self):
        # 更新当前图片索引
        self.current_image_index += 1
        if self.current_image_index >= len(self.image_paths):
            self.current_image_index = 0

        # 显示更新后的图片
        self.display_image()

# 图片文件路径列表
image_paths = ["image1.jpg", "image2.jpg", "image3.jpg"]

# 创建根窗口
root = tk.Tk()

# 创建 ImageViewer 实例
viewer = ImageViewer(root, image_paths)

# 运行主循环
root.mainloop()

你需要将 `image1.jpg`、`image2.jpg` 和 `image3.jpg` 替换为你自己的图片路径。这个示例代码中，我们使用了 Pillow 库（`PIL`）来处理图片。在运行代码之前，确保已经安装了 Pillow 和 Tkinter。