如何使用 python tkinter 将所选图像上传到标签中？答案

【问题标题】：How can I upload the selected image into the label with using python tkinter?如何使用 python tkinter 将所选图像上传到标签中？
【发布时间】：2021-01-01 17:07:56
【问题描述】：

我无法将图片上传到标签中，我尝试了很多方法，但总是出错。我该如何解决？我可以打开文件，我可以选择图像，但我无法在标签上显示它

def openImageFile():
    global imPath
    imPath = filedialog.askopenfilename(initialdir="C:\\", title = "Open an image", filetypes = (("PNG file","*.png"), ("JPEG File","*.jpeg"), ("JPG File","*.jpg"), ("All File Types","*.*")) )
    return True


def myApp(appName:str, WIDTH:int, HEIGHT:int):
    
    appWin = tk.Tk()
    appWin.title(appName)
    
    appWin.geometry(str(WIDTH)+'x'+str(HEIGHT))
    
    #FRAME
    myFrame = tk.Frame(master = appWin, bg='light gray')
    myFrame.place(relwidth = 0.98, relheight= 0.28, relx = 0.01 ,rely=0.01)
    

    btnUploadImage = tk.Button(myFrame, text="Upload Image", command = lambda: openImageFile() )
    #Butonun uygulama ekranina eklenmesi
    btnUploadImage.place(x=300,y=160)
    
    img=ImageTk.PhotoImage(Image.open(imPath))
    
    #LABEL
    firstName = tk.Label(appWin, bg='light gray', text="First Name").place(x=10,y=40)
    middleName = tk.Label(appWin, bg='light gray', text="Middle Name").place(x=10,y=70)
    surname = tk.Label(appWin, bg='light gray', text="Surname").place(x=10,y=100)
    dateOfBirth = tk.Label(appWin, bg='light gray', text="Date of Birth").place(x=10,y=130)
    photo=tk.Label(appWin, image=img).place(relwidth=0.30,relheight=0.15,x=250,y=40)

【问题讨论】：

标签： python image tkinter

【解决方案1】：

你做错了很多事情。首先，place 方法返回None，所以分配给变量没有效果，所以 photo=tk.Label (appWin, image=img).place(relwidth=0.30,relheight=0.15,x=250,y=40) 应该是

photo=tk.Label(appWin, image=img)
photo.place(relwidth=0.30,relheight=0.15,x=250,y=40)

在两个单独的行中。其他变量也类似。

要在上传时在Label 小部件上显示图像，请使用configure 方法。

还将img=ImageTk.PhotoImage(Image.open(imPath)) 放在openImageFile function 中，因为在按下按钮之前未定义imPath。

以下是更正后的代码：

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

def openImageFile():
    global img, photo
    imPath = filedialog.askopenfilename(initialdir="C:\\", title = "Open an image", filetypes = (("PNG file","*.png"), ("JPEG File","*.jpeg"), ("JPG File","*.jpg"), ("All File Types","*.*")) )

    if imPath:
        img=ImageTk.PhotoImage(Image.open(imPath))
        photo.configure(image=img)

def myApp(appName:str, WIDTH:int, HEIGHT:int):
    global photo
    appWin = tk.Tk()
    appWin.title(appName)
    
    appWin.geometry(str(WIDTH)+'x'+str(HEIGHT))
    
    #FRAME
    myFrame = tk.Frame(master = appWin, bg='light gray')
    myFrame.place(relwidth = 0.98, relheight= 0.28, relx = 0.01 ,rely=0.01)
    

    btnUploadImage = tk.Button(myFrame, text="Upload Image", command = openImageFile)
    #Butonun uygulama ekranina eklenmesi
    btnUploadImage.place(x=300,y=160)

    #LABEL
    firstName = tk.Label(appWin, bg='light gray', text="First Name").place(x=10,y=40)
    middleName = tk.Label(appWin, bg='light gray', text="Middle Name").place(x=10,y=70)
    surname = tk.Label(appWin, bg='light gray', text="Surname").place(x=10,y=100)
    dateOfBirth = tk.Label(appWin, bg='light gray', text="Date of Birth").place(x=10,y=130)

    photo=tk.Label(appWin)
    photo.place(relwidth=0.30,relheight=0.15,x=250,y=40)

    appWin.mainloop()
    
myApp('hello', 500, 500)

【讨论】：