Python Tkinter 旋转图像动画 [英] Python Tkinter rotate image animation

问题描述

我有一个使用 PIL 创建然后添加到 TKinter 画布的 PhotoImage.图像显示正常.但是，我无法让 PIL 旋转功能正常工作.这是我的代码:

I have a PhotoImage that I created using PIL and then added to a TKinter canvas. The image shows up fine. However, I can't get the PIL rotate function to work correctly. Here is my code:

 #This works fine
 image = Image.open('img.png')
 canvas_image = ImageTk.PhotoImage(rotated_image)
 canvas_object = canvas.create_image(30+10*int(steps),250, image=canvas_image)
 canvas.pack()

 #this does not work
 canvas.delete(canvas_object)
 rotated_image = image.rotate(1)
 canvas_image = ImageTk.PhotoImage(rotated_image)
 canvas_object = canvas.create_image(30+10*int(steps),250, image=canvas_image)
 canvas.update()

但是，在这种情况下图像不会显示.我希望能够为图像的旋转设置动画，但我什至无法进行旋转工作！非常感谢任何建议.

However, the image just does not show up in this case. I want to be able to animate the rotation of an image, but I can't even get a rotation to work at all! Any suggestions are greatly appreciated.

更正，添加到屏幕后旋转将不起作用

correction, the rotation will not work after it's already been added to the screen

推荐答案

以下是使用 Python3 旋转图像的示例:

Here is an example which rotates an image using Python3:

import tkinter as tk
from PIL import ImageTk
from PIL import Image

class SimpleApp(object):
    def __init__(self, master, filename, **kwargs):
        self.master = master
        self.filename = filename
        self.canvas = tk.Canvas(master, width=500, height=500)
        self.canvas.pack()

        self.update = self.draw().__next__
        master.after(100, self.update)

    def draw(self):
        image = Image.open(self.filename)
        angle = 0
        while True:
            tkimage = ImageTk.PhotoImage(image.rotate(angle))
            canvas_obj = self.canvas.create_image(
                250, 250, image=tkimage)
            self.master.after_idle(self.update)
            yield
            self.canvas.delete(canvas_obj)
            angle += 10
            angle %= 360

root = tk.Tk()
app = SimpleApp(root, '/path/to/image.png')
root.mainloop()

有关 Python2 版本，请参阅修订历史.

For a Python2 version, see the revision history.

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