tkinter创建子窗口（只创建一个)_tkinter子窗口

 
 
import tkinter as tk
#第一种直接写个类
class OneUi:
    def __init__(self,master:tk.Tk):
        self.top=tk.Toplevel(master)
        self.top.geometry('600x400+100+400')
        # self.top.overrideredirect(True)
        self.top['bg']='cyan'
        self.creat_widgets()
 
    def creat_widgets(self):
        self.label=tk.Label(self.top,text='minmin')
        self.label.pack()
 
    def exists(self):
        return self.top.winfo_exists()
 
    def show_top(self):
        return self.top.deiconify()
 
 
 
class MainWindow:
    def __init__(self,root:tk.Tk):
        self.root=root
 
        self.btn=tk.Button(self.root,text='btn_click',command=self.show_oneui).pack()
    def show_oneui(self):
        if not hasattr(self.root,'child_window') or not self.root.child_window.exists():
            self.root.child_window=OneUi(self.root)
        else:
            self.root.child_window.show_top()
 
 
if __name__ == '__main__':
    root=tk.Tk()
    root.geometry('600x500')
    MainWindow(root)
 
    root.mainloop()
 
#第二个用继承
import threading
import time
import tkinter as tk
 
class OneUi(tk.Toplevel):
    def __init__(self,master:tk.Tk):
        super(OneUi, self).__init__(master)
        self.geometry('600x400+100+400')
        # self.top.overrideredirect(True)
        self['bg']='cyan'
        self.creat_widgets()
 
    def creat_widgets(self):
        self.label=tk.Label(self,text='minmin')
        self.label.pack()
 
 
 
 
class MainWindow:
    def __init__(self,root:tk.Tk):
        self.root=root
        self.btn=tk.Button(self.root,text='btn_click',command=self.show_oneui).pack()
    def show_oneui(self):
        if not hasattr(self.root,'child_window') or not self.root.child_window.winfo_exists():
            self.root.child_window=OneUi(self.root)
        else:
            self.root.child_window.deiconify()
 
 
 
 
 
if __name__ == '__main__':
 
 
 
 
    root=tk.Tk()
    root.geometry('600x500')
    MainWindow(root)
 
    root.mainloop()
 
 
#第三种
import tkinter as tk
 
class Ui:
    def setupUi(self,root:tk.Tk):
        root.geometry("900x800")
        root.config(background="cyan")
 
        self.btn = tk.Button(root,text="btn",command=self.on_btn_click)
        self.btn.pack()
        self.w:tk.Toplevel = None
 
 
    def on_close(self):
       if self.w:
           self.w.destroy()
           self.w = None
 
 
 
    def on_btn_click(self):
        if self.__getattribute__("w") is not None:
            self.w.deiconify()
 
        else:
            self.w = tk.Toplevel(root)
            self.w.protocol("WM_DELETE_WINDOW", self.on_close)
 
 
 
 
if __name__ == '__main__':
    root = tk.Tk()
    ui = Ui()
    ui.setupUi(root)
 
    root.mainloop()