python tkinter canvas 显示图片的示例

时间:2022-10-14 08:23:58

先来看一下该方法的说明

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
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

?
1
2
3
4
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

?
1
2
image = none
im = none

之后在方法里使用global来声明变量为全局变量

即:

?
1
2
3
4
5
6
def method():
  global image
  global im
  image = image.open("img.jpg")
  im = imagetk.photoimage(image)
  ...

以上这篇python tkinter canvas 显示图片的示例就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持服务器之家。

原文链接:https://blog.csdn.net/sailist/article/details/79459185