Python-使用Kivy中的按钮
Kivy是Python中与平台无关的GUI工具。由于可以在Android,IOS,Linux和Windows等操作系统上运行,因此Kivy为您提供了编写代码一次并在不同平台上运行的功能。它基本上用于开发Android应用程序,但并不意味着它不能在桌面应用程序上使用。
按钮是带有相关操作的标签,该操作在按下按钮时触发(或在单击/触摸后释放)。我们可以在按钮后面添加功能并设置按钮样式。
示例
# import kivy module import kivy # this restrict the kivy version below this kivy version you cannot # use the app or software kivy.require("1.9.1") # base Class of your App inherits from the App class. # app:always refers to the instance of your application from kivy.app import App # creates the button in kivy if not imported shows the error from kivy.uix.button import Button # class in which we are creating the button class ButtonApp(App): def build(self): # use a (r, g, b, a) tuple btn = Button(text ="Push Me !", font_size ="20sp", background_color =(1, 1, 1, 1), color =(1, 1, 1, 1), size =(32, 32), size_hint =(.2, .2), pos =(300, 250)) # bind() use to bind the button to function callback btn.bind(on_press = self.callback) return btn # callback function tells when button pressed def callback(self, event): print("button pressed") print('Kivy!') # creating the object root for ButtonApp() class root = ButtonApp() #run function runs the whole program. run() method which calls the #target function passed to the constructor. root.run()