如何将多个命令绑定到 Tkinter 按钮
在本教程中，我们将演示如何将多个命令绑定到 Tkinter 按钮。单击该按钮后将执行多个命令。
将多个命令绑定到 Tkinter Button
Tkinter 按钮只有一个 command 属性，因此应将多个命令或函数组合在一起，然后此单函数绑定到按钮的 command。
我们可以用 lambda 组合多个命令，
def command():
return [funcA(), funcB(), funcC()]
此 lambda 函数将分别执行 funcA、funcB 和 funcC。
labmda 绑定多个函数举例
try:
import Tkinter as tk
except:
import tkinter as tk
class Test:
def __init__(self):
self.root = tk.Tk()
self.root.geometry("200x100")
self.button = tk.Button(
self.root,
text="Click Me",
command=lambda: [self.funcA(), self.funcB(), self.funcC()],
)
self.button.pack()
self.labelA = tk.Label(self.root, text="A")
self.labelB = tk.Label(self.root, text="B")
self.labelC = tk.Label(self.root, text="C")
self.labelA.pack()
self.labelB.pack()
self.labelC.pack()
self.root.mainloop()
def funcA(self):
self.labelA["text"] = "A responds"
def funcB(self):
self.labelB["text"] = "B responds"
def funcC(self):
self.labelC["text"] = "C responds"
app = Test()
将函数组合为一个函数
def combineFunc(self, *funcs):
def combinedFunc(*args, **kwargs):
for f in funcs:
f(*args, **kwargs)
return combinedFunc
上面的函数在函数内部定义一个函数，然后返回该函数对象。
for f in funcs:
f(*args, **kwargs)
它执行函数 combineFunc 括号中给出的所有函数。
try:
import Tkinter as tk
except:
import tkinter as tk
class Test:
def __init__(self):
self.root = tk.Tk()
self.root.geometry("200x100")
self.button = tk.Button(
self.root,
text="Click Me",
command=self.combineFunc(self.funcA, self.funcB, self.funcC),
)
self.button.pack()
self.labelA = tk.Label(self.root, text="A")
self.labelB = tk.Label(self.root, text="B")
self.labelC = tk.Label(self.root, text="C")
self.labelA.pack()
self.labelB.pack()
self.labelC.pack()
self.root.mainloop()
def combineFunc(self, *funcs):
def combinedFunc(*args, **kwargs):
for f in funcs:
f(*args, **kwargs)
return combinedFunc
def funcA(self):
self.labelA["text"] = "A responds"
def funcB(self):
self.labelB["text"] = "B responds"
def funcC(self):
self.labelC["text"] = "C responds"
app = Test()
Founder of DelftStack.com. Jinku has worked in the robotics and automotive industries for over 8 years. He sharpened his coding skills when he needed to do the automatic testing, data collection from remote servers and report creation from the endurance test. He is from an electrical/electronics engineering background but has expanded his interest to embedded electronics, embedded programming and front-/back-end programming.
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