Tkinter(二) ｜点击按钮显示图片

r囧r小猫 2022-12-12 15:07 275阅读 0赞

#### 解决办法： ####

--------------------

**出现的问题**

from tkinter import *
    from PIL import Image, ImageTk
    
    root = Tk()
    root.title('按钮点击加载图片')
    def show():
        img = Image.open('1.png')  # 打开图片
        photo = ImageTk.PhotoImage(img)  # 用PIL模块的PhotoImage打开
        imglabel = Label(root, image=photo)
        imglabel.grid(row=0, column=0, columnspan=3)
    btn = Button(root, text="show", command=show)
    btn.grid(row=1, column=1)
    
    mainloop()

**运行结果**

> 图片无法正常显示  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTkyNjU0Nw_size_16_color_FFFFFF_t_70_pic_center]

--------------------

**重点：将参数设置成全局变量**

photo=None
    	img=None

**上代码**

from tkinter import *
    from PIL import Image, ImageTk
    
    root = Tk()
    root.title('按钮点击加载图片')
    photo=None
    img=None
    def show():
        global photo
        global img
        img = Image.open('1.png')  # 打开图片
        photo = ImageTk.PhotoImage(img)  # 用PIL模块的PhotoImage打开
        imglabel = Label(root, image=photo)
        imglabel.grid(row=0, column=0, columnspan=3)
    btn = Button(root, text="show", command=show)
    btn.grid(row=1, column=1)
    
    mainloop()

**运行结果**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTkyNjU0Nw_size_16_color_FFFFFF_t_70_pic_center 1]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTkyNjU0Nw_size_16_color_FFFFFF_t_70_pic_center]: /images/20221123/29c64019ada742669116c6593be34fee.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTkyNjU0Nw_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221123/4b032085714047d4a7de631eb52fbd1d.png