如何更改 Tkinter 标签字体大小？

Tkinter Label 用于显示一行或多行，也可用于显示位图或图像。在本文中，我们将更改 Label Widget 的字体大小。要创建标签使用以下内容：

Syntax: label = Label(parent, option, …)

Parameters:
parent: Object of the widget that will display this label, generally a root object
text: To display one or more lines of text.
image: To display a static image
compound: To display both Text and Image. It accepts TOP, BOTTOM, LEFT, RIGHT, CENTER. For example, if you write compound=TOPimage will displayed to the top of Text.

我们可以使用不同的方法来做到这一点：

方法一：通过使用Label的字体属性。

Python3

# importing tkinter module and Widgets
from tkinter import Tk
from tkinter.ttk import Label
  
  
# Creating App class which will contain
# Label Widgets
class App:
    def __init__(self, master) -> None:
  
        # Instantiating master i.e toplevel Widget
        self.master = master
  
        # Creating first Label i.e with default font-size
        Label(self.master, text="I have default font-size").pack(pady=20)
  
        # Creating second label
        # This label has a font-family of Arial
        # and font-size of 25
        Label(self.master,
              text="I have a font-size of 25",
  
              # Changing font-size here
              font=("Arial", 25)
              ).pack()
  
  
if __name__ == "__main__":
  
    # Instantiating top level
    root = Tk()
  
    # Setting the title of the window
    root.title("Change font-size of Label")
  
    # Setting the geometry i.e Dimensions
    root.geometry("400x250")
  
    # Calling our App
    app = App(root)
  
    # Mainloop which will cause this toplevel
    # to run infinitely
    root.mainloop()

输出：

方法 2：通过使用 Style 类。在这种方法中，我们将使用我们的自定义样式，否则所有 Label 小部件都将获得相同的样式。

蟒蛇3

# importing tkinter module and Widgets
from tkinter import Tk
from tkinter.ttk import Label, Style
  
  
# Creating App class which will contain
# Label Widgets
class App:
    def __init__(self, master) -> None:
  
        # Instantiating master i.e toplevel Widget
        self.master = master
  
        # Creating first Label i.e with default font-size
        Label(self.master, text="I have default font-size").pack(pady=20)
  
        # Instantiating Style class
        self.style = Style(self.master)
  
        # Configuring Custom Style
        # Name of the Style is "My.TLabel"
        self.style.configure("My.TLabel", font=('Arial', 25))
  
        # Creating second label
        # This label has a font-family of Arial
        # and font-size of 25
        Label(
            self.master,
            text="I have a font-size of 25",
  
            # Changing font-size using custom style
            style="My.TLabel").pack()
  
  
if __name__ == "__main__":
  
    # Instantiating top level
    root = Tk()
  
    # Setting the title of the window
    root.title("Change font-size of Label")
  
    # Setting the geometry i.e Dimensions
    root.geometry("400x250")
  
    # Calling our App
    app = App(root)
  
    # Mainloop which will cause this toplevel
    # to run infinitely
    root.mainloop()

输出：

注意：上述方法中， TLabel是默认样式的名称。因此，如果您想创建自己的样式名称，请始终使用以下语法

my_style_name.default_style_name

Example:
New.TButton  # To override Button Widget’s styles
My.TLabel    # To override Label Widget’s Styles
Abc.TEntry   # To override Entry Widget’s Styles

如果您只使用默认样式名称，那么它将适用于所有相应的小部件，即如果我使用TLabel而不是My.TLabel ，那么两个标签的字体大小都将为 25。重要的是，如果您使用默认样式名称，那么您不需要提供 style 属性。

额外：使用默认样式名称更改字体大小。

蟒蛇3

# importing tkinter module and Widgets
from tkinter import Tk
from tkinter.ttk import Label, Style
  
  
# Creating App class which will contain
# Label Widgets
class App:
    def __init__(self, master) -> None:
  
        # Instantiating master i.e toplevel Widget
        self.master = master
  
        # Creating first Label i.e with default font-size
        Label(self.master, text="I have default font-size").pack(pady=20)
  
        # Instantiating Style class
        self.style = Style(self.master)
  
        # Changing font-size of all the Label Widget
        self.style.configure("TLabel", font=('Arial', 25))
  
        # Creating second label
        # This label has a font-family of Arial
        # and font-size of 25
        Label(self.master, text="I have a font-size of 25").pack()
  
  
if __name__ == "__main__":
  
    # Instantiating top level
    root = Tk()
  
    # Setting the title of the window
    root.title("Change font-size of Label")
  
    # Setting the geometry i.e Dimensions
    root.geometry("400x250")
  
    # Calling our App
    app = App(root)
  
    # Mainloop which will cause this toplevel
    # to run infinitely
    root.mainloop()

请注意，在上面的程序中，我们没有为任何 Label 提供样式或字体属性，但它们仍然具有相同的字体大小和相同的字体系列。

输出：

方法 3：通过使用Font类。在这个方法中，我们将创建一个 Font 对象，然后使用它来更改任何小部件的字体样式。受益于此

Font class consist of following property:
root: Object of toplevel widget.
family: The font family name as a string.
size: The font height as an integer in points.
weight: ‘bold’/BOLD for boldface, ‘normal’/NORMAL for regular weight.
slant: ‘italic’/ITALIC for italic, ‘roman’/ROMAN for unslanted.
underline: 1/True/TRUE for underlined text, 0/False/FALSE for normal.
overstrike: 1/True/TRUE for overstruck text, 0/False/FALSE for normal.

蟒蛇3

# importing tkinter module and Widgets
from tkinter import Tk
from tkinter.font import BOLD, Font
from tkinter.ttk import Label
  
  
# Creating App class which will contain Label Widgets
class App:
    def __init__(self, master) -> None:
  
        # Instantiating master i.e toplevel Widget
        self.master = master
  
        # Creating first Label i.e with default font-size
        Label(self.master, text="I have default font-size").pack(pady=20)
  
        # Creating Font, with a "size of 25" and weight of BOLD
        self.bold25 = Font(self.master, size=25, weight=BOLD)
  
        # Creating second label
        # This label has a default font-family
        # and font-size of 25
        Label(self.master, text="I have a font-size of 25",
              font=self.bold25).pack()
  
  
if __name__ == "__main__":
  
    # Instantiating top level
    root = Tk()
  
    # Setting the title of the window
    root.title("Change font-size of Label")
  
    # Setting the geometry i.e Dimensions
    root.geometry("400x250")
  
    # Calling our App
    app = App(root)
  
    # Mainloop which will cause this toplevel
    # to run infinitely
    root.mainloop()

输出：