为什么我的TKINTER程序不起作用？我可以找到错误

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编辑问题以包括所需的行为，特定问题或错误以及重现问题所需的最短代码。这将帮助其他人回答这个问题。

闭合 2年前。

Answer 1

这里有一些要打开包装。

首先，PACK方法返回无，因此当您执行时：

label = Label(root, image=image1).pack(side= LEFT)

Label基本上没有一个，因此更改其映像将无法正常工作。

其次，而不是为paris编写功能，为什么不编写将城市作为参数的通用函数？然后，您可以使用lambda函数将此函数分配为按钮的命令。

最后，正如此答案 Image1 将在功能结束时收集，因此，您应该指定使用global内在功能内已声明的变量。 （更好的解决方案是将您的窗口创建为类，并设置self.image1）

q1 = """Paris Paris Paris Paris Paris Paris Paris
Paris Paris Paris Paris Paris Paris Paris Paris
Paris Paris Paris Paris Paris Paris Paris Paris"""
q2 = """Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1
Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1
Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 """
w1 = """ london london london london london london
london london london london london london london
london"""
w2 = """Paris Paris Paris Paris Paris Paris Paris
Paris Paris Paris Paris Paris Paris Paris Paris
Paris Paris Paris Paris Paris Paris Paris Paris"""
e1 = """Paris Paris Paris Paris Paris Paris Paris
Paris Paris Paris Paris Paris Paris Paris Paris
Paris Paris Paris Paris Paris Paris Paris Paris"""
e2 = """Paris Paris Paris Paris Paris Paris Paris
Paris Paris Paris Paris Paris Paris Paris Paris
Paris Paris Paris Paris Paris Paris Paris Paris"""

class City():
    """docstring for City"""
    def __init__(self, text, text_night, image, image_night):
        self.text = text
        self.text_night = text_night
        self.image = image
        self.image_night = image_night


def set_city_pic(city: City):
    global image1
    if night_mode.get():
        im = PhotoImage(file=city.image_night)
        text.configure(text=str(city.text_night))
    else:
        im = PhotoImage(file=city.image)
        text.configure(text=str(city.text))

    image1 = im.subsample(2, 2)
    label.configure(image=image1)

Paris = City(q1, q2, "paris_day.png", "paris_night.png")
London = City(w1, w2, "london_day.png", "london_night.png")
Berlin = City(e1, e2, "berlin_day.png", "berlin_night.png")

from tkinter import *

root = Tk()
root.title("Trips")
root.geometry("750x400")
frame = Frame(root, width = 1, height=4)


knopka1=Button(master=frame, text="Paris", command=lambda: set_city_pic(Paris))
knopka1.pack(padx=5, pady=5)
knopka2=Button(master=frame, text="London", command=lambda: set_city_pic(London))
knopka2.pack(padx=5, pady=5)
knopka3=Button(master=frame, text="Berlin", command=lambda: set_city_pic(Berlin))
knopka3.pack(padx=5, pady=5)

night_mode = IntVar()
praporets = Checkbutton(master=frame, text = "Night mode", variable = night_mode, onvalue = 1, offvalue = 0, height=5, width = 20)
praporets.pack(padx=5, pady=5)
frame.pack(side=LEFT)

im = PhotoImage(file=Paris.image)
image1 = im.subsample(2, 2)
label = Label(root,  image=image1)
label.pack(side= LEFT)
text = Label(root)
text.pack(side=LEFT)

root.mainloop()

Answer 2

我认为问题是您的名字惯例。
您可以使用名称为“巴黎”的功能创建一个函数，但随后用您创建的类覆盖变量。
然后，当您将“巴黎”作为按钮的命令传递时，该按钮试图执行“巴黎”，但巴黎是无法执行的对象。这也是您没有错误的原因。

def change(self):
     if result.get() == 1:
         self.text.configure(text=str(self.text_night))
         self.label.configure(image=self.image_night)
     else:
          print('123')

另外，要访问“文本”，就像您想在现在称为函数“ changeparis”中执行的“文本”，您需要使“更改”一种“城市”的方法。那就是为什么您需要将“自我”作为一个论点。

最后但并非最不重要的一点是，您需要将标签的参考等转移到“城市”中，否则您将无法访问它们。

那是我的最终代码：

q1 = """
Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris""" q2 = """Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 Paris1 """ w1 = """ london london london london london london london london london london london london london london""" w2 = """Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris""" e1 = """Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris""" e2 = """Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris Paris
"""
    
class City():
    """docstring for City"""
    def __init__(self, text, text_night, image, image_night, label, text):
        self.text = text
        self.text_night = text_night
        self.image = image
        self.image_night = image_night
        self.label = label
        self.text = text

    def change(self):
        if result.get() == 1:
            self.text.configure(text=str(self.text_night))
            self.label.configure(image=self.image_night)
        else:
            print("123")
    
from tkinter import * root = Tk() root.title("Trips") root.geometry("750x400") frame = Frame(root, width = 1, height=4)

img = PhotoImage(file = Paris.image) image1 = img.subsample(2, 2) label = Label(root, image=image1).pack(side= LEFT) text = Label(root, text=Paris.text) text.pack(side=LEFT)
    
Paris = City(q1, q2, "london_day.gif", "london_night.gif", label, text) 
London = City(w1, w2, "london_day.gif", "london_night.gif", label, text) 
Berlin = City(e1, e2, "london_day.gif", "london_night.gif", label, text)
    
knopka1=Button(master=frame, text="Paris", command=Paris.change) knopka1.pack(padx=5, pady=5) 
knopka2=Button(master=frame, text="London") 
knopka2.pack(padx=5, pady=5) 
knopka3=Button(master=frame, text="Berlin") 
knopka3.pack(padx=5, pady=5)
    
    result = IntVar() 
praporets = Checkbutton(master=frame, text = "Night mode", variable = result ,onvalue = 1, offvalue = 0, height=5, width = 20) praporets.pack(padx=5, pady=5) 
frame.pack(side=LEFT)
    
root.mainloop()

我尽了最大的努力，但无法测试。请注意。希望我能帮助您！