网络编程
位置:首页>> 网络编程>> Python编程>> python tkinter canvas 显示图片的示例

python tkinter canvas 显示图片的示例

作者:Sailist  发布时间:2022-01-27 12:40:38 

标签:python,tkinter,canvas,图片

先来看一下该方法的说明


create_image(position, **options) [#]
Draws an image on the canvas.

position
Image position, given as two coordinates.
**options
Image options.
activeimage=
anchor=
Where to place the image relative to the given position. Default is CENTER.
disabledimage=
image=
The image object. This should be a PhotoImage or BitmapImage, or a compatible object (such as the PIL PhotoImage). The application must keep a reference to the image object.
state=
Item state. One of NORMAL, DISABLED, or HIDDEN.
tags=
A tag to attach to this item, or a tuple containing multiple tags.
Returns:
The item id.

关于image有两个重要的点要注意,一个是格式,第二是要保持持续引用

The image object. This should be a

1.This should be a PhotoImage or BitmapImage, or a compatible object (such as the PIL PhotoImage).

2.The application must keep a reference to the image object.

因此代码应该这样写,并且变量im应该是全局变量


image = Image.open("img.jpg")
im = ImageTk.PhotoImage(image)

canvas.create_image(300,50,image = im)

但如果我就是想要在方法里调用怎么办?

那么可以提前声明全局变量


image = None
im = None

之后在方法里使用global来声明变量为全局变量

即:


def method():
 global image
 global im
 image = Image.open("img.jpg")
 im = ImageTk.PhotoImage(image)
 ...

来源:https://blog.csdn.net/sailist/article/details/79459185

0
投稿

猜你喜欢

手机版 网络编程 asp之家 www.aspxhome.com