Python 如何将两个不同的GIF绑定到kivy中的切换按钮?
我从一个有用的用户那里得到了这段代码,它几乎是完美的Python 如何将两个不同的GIF绑定到kivy中的切换按钮?,python,kivy,animated-gif,kivy-language,Python,Kivy,Animated Gif,Kivy Language,我从一个有用的用户那里得到了这段代码,它几乎是完美的 from kivy.app import App from kivy.uix.boxlayout import BoxLayout from kivy.lang import Builder Builder.load_string(""" <ExampleApp>: id: main orientation: "vertical" Button: size_hint_x: None
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.lang import Builder
Builder.load_string("""
<ExampleApp>:
id: main
orientation: "vertical"
Button:
size_hint_x: None
size_hint_y: None
height: 300
width: self.height
center: self.parent.center
text: ""
on_press: gif.anim_delay = 0.09
on_press: gif._coreimage.anim_reset(True)
Image:
id: gif
source: 'power_on.gif'
center: self.parent.center
height: 300
width: self.height
allow_stretch: True
anim_delay: -1
anim_loop: 1
""")
class ExampleApp(App, BoxLayout):
def build(self):
return self
if __name__ == "__main__":
ExampleApp().run()
但那根本不起作用。它甚至从未播放过开机gif,因为它立即将gif的来源更改为关机
正确的方法是什么?下面的第一个gif是
power\u off.gif
:
-考虑添加StringProperty
import,该属性将保留当前gif图像源
from kivy.properties import StringProperty
-添加处理不同更改的方法:
class ExampleApp(App, BoxLayout):
power = StringProperty('power_off.gif')
def build(self):
return self
def change_state(self):
if self.power == 'power_on.gif':
self.power = 'power_off.gif'
else:
self.power = 'power_on.gif'
-然后将这些更改添加到您的kv中:
Builder.load_string("""
<ExampleApp>:
id: main
orientation: "vertical"
Button:
size_hint_x: None
size_hint_y: None
height: 300
width: self.height
center: self.parent.center
text: ""
on_press: gif.anim_delay = 0.09
on_press: gif._coreimage.anim_reset(True); root.change_state()
Image:
id: gif
source: root.power
center: self.parent.center
height: 300
width: self.height
allow_stretch: True
anim_delay: -1
anim_loop: 1
""")
Builder.load\u字符串(“”)
:
id:main
方向:“垂直”
按钮:
大小提示:无
尺寸提示:无
身高:300
宽度:自我高度
中心:self.parent.center
案文:“”
按下:gif.anim\u延迟=0.09
按:gif.\u coreimage.anim\u重置(True);root.change\u state()
图片:
id:gif
来源:root.power
中心:self.parent.center
身高:300
宽度:自我高度
允许拉伸:真
动画延迟:-1
动画循环:1
""")
Builder.load_string("""
<ExampleApp>:
id: main
orientation: "vertical"
Button:
size_hint_x: None
size_hint_y: None
height: 300
width: self.height
center: self.parent.center
text: ""
on_press: gif.anim_delay = 0.09
on_press: gif._coreimage.anim_reset(True); root.change_state()
Image:
id: gif
source: root.power
center: self.parent.center
height: 300
width: self.height
allow_stretch: True
anim_delay: -1
anim_loop: 1
""")