输入直到离开kivy时如何调用函数？
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【中文标题】输入直到离开kivy时如何调用函数？【英文标题】：How to call a function when entered until leaved kivy? 【发布时间】：2021-12-11 23:53:49 【问题描述】：输入到离开kivy时如何调用函数？ 我正在通过移动 kivy 应用程序编写鼠标控制应用程序。 我的代码： 进口猕猴桃 从 kivy.app 导入应用程序 从 kivy.uix.boxlayout 导入 BoxLayout 导入套接字 进口时间
kivy.require("1.9.0")
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
类 MyRoot(BoxLayout): def 初始化（自我）： self.command = "" 自我卷= 0 super(MyRoot, self).init()
def shutdown(self):
self.command = "shutdown"
self.send_message()
def tangAmLuong(self):
self.command = "tang_am_luong"
self.send_message()
if self.vol <= 98:
self.vol += 2
self.volume_text.text = str(self.vol)
time.sleep(0.1)
def giamAmLuong(self):
self.command = "giam_am_luong"
self.send_message()
if self.vol >= 2:
self.vol -= 2
self.volume_text.text = str(self.vol)
time.sleep(0.1)
def trai(self):
self.command = "sang_trai"
self.send_message()
def phai(self):
self.command = "sang_phai"
self.send_message()
def len(self):
self.command = "len"
self.send_message()
def xuong(self):
self.command = "xuong"
self.send_message()
def chuot_trai(self):
self.command = "chuot_trai"
self.send_message()
def chuot_phai(self):
self.command = "chuot_phai"
self.send_message()
def send_message(self):
client.send(f"self.nickname_text.text: self.command".encode("utf-8"))
def connect_to_server(self):
if self.nickname_text != "":
client.connect((self.ip_text.text, 9999))
self.send_message()
类风格（App）：
def build(self):
return MyRoot()
webChat = 风格（） webChat.run()
基维文件：
ip_text: ip_text
nickname_text: nickname_text
connect_btn: connect_btn
connection_grid: connection_grid
shutdown_btn: shutdown_btn
tangal_btn: tangal_btn
giamal_btn: giamal_btn
volume_text: volume_text
orientation: 'vertical'
GridLayout:
id: connection_grid
rows: 1
cols: 2
padding: 10
spacing: 10
height: 125
size_hint: (1, None)
BoxLayout:
orientation: 'vertical'
Label:
text: "Server IP"
font_size: 42
color: 0.92, 0.45, 0, 1
TextInput:
id: ip_text
size_hint: (1, None)
height: 50
font_size: 36
BoxLayout:
orientation: 'vertical'
Label:
text: "Nickname"
font_size: 42
color: 0.92, 0.45, 0, 1
TextInput:
id: nickname_text
size_hint: (1, None)
height: 50
font_size: 36
Button:
id: connect_btn
text: "Connect"
font_size: 32
size: 100, 50
size_hint: (1, None)
height: 50
on_press: root.connect_to_server()
Button:
id: shutdown_btn
text: "Tắt máy"
font_size: 32
size: 100, 50
size_hint: (1, None)
height: 50
on_press: root.shutdown()
Button:
id: tangal_btn
text: "Tăng âm lương"
font_size: 32
size: 100, 50
size_hint: (1, None)
height: 50
on_press: root.tangAmLuong()
Button:
id: giamal_btn
text: "Giảm âm lượng"
font_size: 32
size: 100, 50
size_hint: (1, None)
height: 50
on_press: root.giamAmLuong()
Label:
id: volume_text
text: "0"
font_size: 36
GridLayout:
rows: 3
cols: 3
Button:
text: "Chuột Trái"
font_size: 14
on_press: root.chuot_trai()
Button:
text: "Lên"
font_size: 14
on_press: root.len()
Button:
text: "Chuột Phải"
font_size: 14
on_press: root.chuot_phai()
Button:
text: "Trái"
font_size: 14
on_press: root.trai()
Label:
text: ""
font_size: 14
Button:
text: "Phải"
font_size: 14
on_press: root.phai()
Label:
text: ""
font_size: 14
Button:
text: "Xuống"
font_size: 14
on_press: root.xuong()
Label:
text: ""
font_size: 14
【问题讨论】：
【参考方案1】：我稍微修改了您的代码，希望对您有所帮助。
请看：https://kivy.org/doc/stable/api-kivy.properties.html
请原谅我的拼写 (hung_nguyen)
hung_nguyen.py
> from kivy.app import App
from kivy.lang.builder import Builder
from kivy.properties import StringProperty, NumericProperty
from kivy.uix.boxlayout import BoxLayout
from socket import socket, AF_INET, SOCK_STREAM
from time import sleep
Builder.load_file('hung_nguyen.kv')
client = socket(AF_INET, SOCK_STREAM)
class MyRoot(BoxLayout):
ip_text = StringProperty()
nickname_text = StringProperty()
connect_btn = StringProperty()
connection_grid = StringProperty()
shutdown_btn = StringProperty()
tangal_btn = StringProperty()
giamal_btn = StringProperty
volume_text = StringProperty()
vol = NumericProperty()
def __init__(self):
super(MyRoot, self).__init__()
self.command = None
pass
def shutdown(self):
self.command = "shutdown"
self.send_message()
def tangAmLuong(self):
self.command = "tang_am_luong"
self.send_message()
if self.vol <= 98:
self.vol += 2
self.volume_text = str(self.vol)
sleep(0.1)
def giamAmLuong(self):
self.command = "giam_am_luong"
self.send_message()
if self.vol >= 2:
self.vol -= 2
self.volume_text = str(self.vol)
sleep(0.1)
def trai(self):
self.command = "sang_trai"
self.send_message()
def phai(self):
self.command = "sang_phai"
self.send_message()
def len(self):
self.command = "len"
self.send_message()
def xuong(self):
self.command = "xuong"
self.send_message()
def chuot_trai(self):
self.command = "chuot_trai"
self.send_message()
def chuot_phai(self):
self.command = "chuot_phai"
self.send_message()
def on_ip_text(self, *args):
print('on_ip_text', self.ip_text, args)
pass
def on_nickname_text(self, *args):
print('on_nickname_text', self.nickname_text)
pass
def on_connect_btn(self, *args):
print('on_connect_btn', self.connect_btn)
pass
def on_connection_grid(self, *args):
print('on_connection_grid', self.connection_grid)
pass
def on_shutdown_btn(self, *args):
print('on_shutdown_btn', self.shutdown_btn)
pass
def on_tangal_btn(self, *args):
print('on_tangal_btn', self.tangal_btn)
pass
def on_giamal_btn(self, *args):
print('on_giamal_btn', self.giamal_btn)
pass
def on_volume_text(self, *args):
print('on_volume_text', self.volume_text)
pass
def on_vol(self, *args):
print('on_vol', self.vol)
pass
def send_message(self):
try:
client.send(f"self.nickname_text: self.command".encode("utf-8"))
except OSError as os_err:
print(os_err)
def connect_to_server(self):
if self.nickname_text != "":
client.connect((self.ip_text.text, 9999))
self.send_message()
class style(App):
def build(self):
return MyRoot()
if __name__ == '__main__':
style().run()
hung_nguyen.kv
<MyRoot>:
ip_text: root.ip_text
nickname_text: root.nickname_text
connect_btn: root.connect_btn
connection_grid: root.connection_grid
shutdown_btn: root.shutdown_btn
tangal_btn: root.tangal_btn
giamal_btn: root.giamal_btn
volume_text: root.volume_text
BoxLayout:
orientation: 'vertical'
GridLayout:
id: connection_grid
rows: 1
cols: 2
padding: 10
spacing: 10
height: 125
size_hint: (1, None)
BoxLayout:
orientation: 'vertical'
Label:
text: "Server IP"
font_size: 42
color: 0.92, 0.45, 0, 1
TextInput:
id: ip_text
size_hint: (1, None)
height: 50
font_size: 36
BoxLayout:
orientation: 'vertical'
Label:
text: "Nickname"
font_size: 42
color: 0.92, 0.45, 0, 1
TextInput:
id: nickname_text
size_hint: (1, None)
height: 50
font_size: 36
Button:
id: connect_btn
text: "Connect"
font_size: 32
size: 100, 50
size_hint: (1, None)
height: 50
on_press: root.connect_to_server()
Button:
id: shutdown_btn
text: "Tắt máy"
font_size: 32
size: 100, 50
size_hint: (1, None)
height: 50
on_press: root.shutdown()
Button:
id: tangal_btn
text: "Tăng âm lương"
font_size: 32
size: 100, 50
size_hint: (1, None)
height: 50
on_press: root.tangAmLuong()
Button:
id: giamal_btn
text: "Giảm âm lượng"
font_size: 32
size: 100, 50
size_hint: (1, None)
height: 50
on_press: root.giamAmLuong()
Label:
id: volume_text
text: "0"
font_size: 36
GridLayout:
rows: 3
cols: 3
Button:
text: "Chuột Trái"
font_size: 14
on_press: root.chuot_trai()
Button:
text: "Lên"
font_size: 14
on_press: root.len()
Button:
text: "Chuột Phải"
font_size: 14
on_press: root.chuot_phai()
Button:
text: "Trái"
font_size: 14
on_press: root.trai()
Label:
text: ""
font_size: 14
Button:
text: "Phải"
font_size: 14
on_press: root.phai()
Label:
text: ""
font_size: 14
Button:
text: "Xuống"
font_size: 14
on_press: root.xuong()
Label:
text: ""
font_size: 14
【讨论】：
【参考方案2】：您可以使用App 类中的on_start 方法在启动时调用任何函数，如下所示：
class style(App):
def build(self):
return MyRoot()
def on_start(self):
self.random_method1()
self.random_method2()
print("Start-up completed!")
【讨论】：
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