Kivy动漫类动画Kivy图片

我试图使用Kivy动画类动画我的Image类。这是因为我想单独修改每个图像的anim_delay和位置值。

我想修改图像类的'source'属性。虽然它识别'source'属性，但它会尝试乘以文件名字符串文件。

如何修改图像文件名？

工作实施例：

from kivy.app import App 
from kivy.animation import Animation 
from kivy.clock import Clock 
from kivy.uix.boxlayout import BoxLayout 
from kivy.uix.button import Button 
from kivy.uix.image import Image 

class Test(App): 
    def __init__(self, **kwargs): 
     super(Test, self).__init__(**kwargs) 

     self.content = BoxLayout() 
     self.content.orientation = 'vertical' 
     self.anim_image = Image(source = 'image1.png') 
     self.anim_button = Button(on_press=self.animate_image) 
     self.content.add_widget(self.anim_image) 
     self.content.add_widget(self.anim_button) 

    def build(self): 
     return self.content 

    def animate_image(self, *args, **kwargs): 
     image_animate = Animation() 
     for i in range(4): 
      image_animate += Animation(x = (i + 10), source = 'image' + str(i) + '.png', duration=(0.10 * i)) 
     image_animate.start(self.anim_image) 


if __name__ == '__main__': 
    Test().run()

错误日志：

[INFO ] [Base  ] Leaving application in progress... 
Traceback (most recent call last): 
    File "C:\Python34x86\projects\rogue_like_app\repeatable issues\animation_image_source.py", line 31, in <module> 
    Test().run() 
    File "C:\Python34x86\lib\site-packages\kivy\app.py", line 828, in run 
    runTouchApp() 
    File "C:\Python34x86\lib\site-packages\kivy\base.py", line 504, in runTouchApp 
    EventLoop.window.mainloop() 
    File "C:\Python34x86\lib\site-packages\kivy\core\window\window_sdl2.py", line 663, in mainloop 
    self._mainloop() 
    File "C:\Python34x86\lib\site-packages\kivy\core\window\window_sdl2.py", line 405, in _mainloop 
    EventLoop.idle() 
    File "C:\Python34x86\lib\site-packages\kivy\base.py", line 339, in idle 
    Clock.tick() 
    File "C:\Python34x86\lib\site-packages\kivy\clock.py", line 581, in tick 
    self._process_events() 
    File "kivy\_clock.pyx", line 367, in kivy._clock.CyClockBase._process_events (kivy\_clock.c:7700) 
    File "kivy\_clock.pyx", line 397, in kivy._clock.CyClockBase._process_events (kivy\_clock.c:7577) 
    File "kivy\_clock.pyx", line 395, in kivy._clock.CyClockBase._process_events (kivy\_clock.c:7498) 
    File "kivy\_clock.pyx", line 167, in kivy._clock.ClockEvent.tick (kivy\_clock.c:3490) 
    File "C:\Python34x86\lib\site-packages\kivy\animation.py", line 345, in _update 
    value = calculate(a, b, t) 
    File "C:\Python34x86\lib\site-packages\kivy\animation.py", line 376, in _calculate 
    return (a * (1. - t)) + (b * t) 
TypeError: can't multiply sequence by non-int of type 'float'

展望从Kivy代码animation.py我看到从上方返回一个错误的值是：

a = image2.png 
b = image1.png 
t = 0.0

这是否意味着这样做的动画就像我打算在基维代码中不固有的？或者，我该如何解决此问题，以便动画能够正确循环？

来源

2017-07-06 Kevin Alvarez

错误发生的原因动画不能做到从STR对象过渡到STR对象“image0.png” - > “image1.png”！？要解决此

的一种方法是使用on_complete回调

def animate_image(self, *args, **kwargs): 
    image_animate = Animation() 

    def f(i, w): 
     w.source = 'image%d.jpg' % i 


    for i in range(4): 

     a = Animation(x = (i + 10), duration=(0.10 * i), 
        ) 
     a.on_complete = functools.partial(f, i) 


     image_animate += a 

    image_animate.start(self.anim_image)

另一个选项是让图像上的IMAGE_NUM财产和绑定它，所以它会改变形象相应...

例如在KV文件中：

<MyImage>: 
    image_num: 0 
    source: "image%d.png" % int(self.image_num)

，并在.py文件：

image_animate += Animation(x = (i + 10), image_num=i, duration=(0.10 * i))

来源

2017-07-06 19:57:48

谢谢这确实工作，并接受它作为一个解决方案。但是，我将无法使用它，因为使用它时似乎有半秒的延迟。 –

我看不到任何延迟很大的原因，也许你的图像非常大？ –

Kivy动漫类动画Kivy图片

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