我的程序使用First类中的按钮来触发Second类中的函数。但是,当按下按钮时,它需要我包含一个self参数,那么如何通过使用静态方法建议表单(Python 3 Tkinter - How to call a function from another class)或使用其他替代方法来解决此问题来调用另一个函数。
如果您可以建议我如何在第二课中使用该StringVar,那么对我来说会更容易,问候。
我认为应该修改的代码的唯一部分:
self.traceButton=Button(self.main_inner_frame,text="Trace",command=Second.printSecondLine())
第二类代码:
class Second(First):
# @staticmethod
def __init__(self,master):
super().__init__(master)
def printSecondLine(self):
content = self.traceEntry.get()
print(content)
如果您需要完整代码:
from tkinter import *
class First(Frame):
def __init__(self,master):
super().__init__()
master.minsize(width=755, height=520)
master.maxsize(width=755, height=520)
Grid.config(self)
# Run all function in [First Class]
self.widget_size()
#self.getTEXT()
def widget_size(self):
# Define a small frame for it
self.main_inner_frame = LabelFrame(self,text="Tracing Method",height= 120,width =355)
self.main_inner_frame.grid(row= 0, column=0)
self.main_inner_frame.grid_propagate(0)
# Create a button for it [When trace click it will show the text in the entry on terminal]
self.traceButton = Button(self.main_inner_frame, text="Trace",command=Second.printSecondLine())
self.traceButton.grid(row = 0, column = 1, sticky = W)
# Create a entry box for the user
# use a string variable tvar
tvar = StringVar()
self.traceEntry = Entry(self.main_inner_frame,textvariable=tvar,width=30)
self.traceEntry.grid(row = 0, column = 2, sticky = W)
# def getTEXT(self):
# content = self.traceEntry.get()
# print(content)
class Second(First):
# @staticmethod
def __init__(self,master):
super().__init__(master)
def printSecondLine(self):
content = self.traceEntry.get()
print(content)
return content
if __name__ == '__main__':
root = Tk()
root.title("Good System")
TIF = First(root)
root.mainloop()
预期结果当用户按下按钮时,该条目将获得文本并显示在终端中。
解决了。我做了一些事情来让你的代码按照你想要的规范工作:
无论如何,它的工作原理。您将数据输入到条目中,单击按钮,数据将进入控制台。您可能希望在单击按钮后编写清除Entry字段的代码。但这是一个不同的主题,并不难做到。
from tkinter import *
class First(Frame):
def __init__(self,master):
super().__init__()
master.minsize(width=755, height=520)
master.maxsize(width=755, height=520)
Grid.config(self)
# Run all function in [First Class]
self.widget_size()
def widget_size(self):
# Define a small frame for it
self.main_inner_frame = LabelFrame(self,text="Tracing Method",height= 120,width =355)
self.main_inner_frame.grid(row= 0, column=0)
self.main_inner_frame.grid_propagate(0)
# Create a entry box for the user
# use a string variable tvar
tvar = StringVar()
self.traceEntry = Entry(self.main_inner_frame,textvariable=tvar,width=30)
self.traceEntry.grid(row = 0, column = 2, sticky = W)
# Create a button for it [When trace click it will show the text in the entry on terminal]
self.traceButton = Button(self.main_inner_frame, text="Trace",command=lambda: Second.printSecondLine(tvar))
self.traceButton.grid(row = 0, column = 1, sticky = W)
class Second(First):
@staticmethod
def __init__(self,master):
super().__init__(master)
@staticmethod
def printSecondLine(value):
print(value.get())
if __name__ == '__main__':
root = Tk()
root.title("Good System")
TIF = First(root)
root.mainloop()
在创建按钮时,除非像这样使用lambda,否则不能将command =设置为括号'()'。
self.traceButton = Button(self.main_inner_frame,text="Trace",
command= lambda: Second.printSecondLine())
但这也应该有效:
self.traceButton = Button(self.main_inner_frame, text="Trace",command=Second.printSecondLine)