如何在Kivy中与标签碰撞

问题描述

我有此代码，但我不知道如何冲突Label：标签和Buttons。 这是代码：

 def _on_keyboard_down(self,keyboard,keycode,text,modifiers):
        if keycode[1] == 'z' or keycode[1] == 'up':
            self.pY += .1
            for wid in self.walk():
                if isinstance(wid,Button):
                    if Tag.collide_widget(wid):

因此，我在主类中行走（），如果它是一个Button，则使用collide_widget。想想我尝试将什么作为该函数的args，似乎没有任何作用。

这里是完整代码：** Mainfile **

from kivy.app import App
from kivy.config import Config
from kivy.uix.floatlayout import FloatLayout
from kivy.properties import NumericProperty
from kivy.core.window import Window
from kivy.uix.label import Label
from kivy.uix.button import Button

Window.size = (900,600)
Config.set('graphics','resizable',True)


class Tag(Label):
    pass


class MainWindow(FloatLayout):
    pY = NumericProperty(.6)
    pX = NumericProperty(.6)

    def __init__(self,**kwargs):

        super(MainWindow,self).__init__(**kwargs)
        self._keyboard = Window.request_keyboard(self._keyboard_closed,self)
        self._keyboard.bind(on_key_down=self._on_keyboard_down)

    def _keyboard_closed(self):
        self._keyboard.unbind(on_key_down=self._on_keyboard_down)
        self._keyboard = None

    def _on_keyboard_down(self,Button):
                    if Tag.collide_widget(Tag,wid):
                        self.pY -= .2
        elif keycode[1] == 's' or keycode[1] == 'down':
            self.pY -= .1
        elif keycode[1] == 'q' or keycode[1] == 'left':
            self.pX -= .1
        elif keycode[1] == 'd' or keycode[1] == 'right':
            self.pX += .1
        elif keycode[1] == 'o':
            return 0
        return True


class FenetreApp(App):
    def build(self):
        return MainWindow()


FenetreApp().run()

Fenetre.kv文件：

<Button>:
     size_hint: 0.1,0.1
     background_color: 0.1,0.5,0.6,1


<Tag@Label>:
     size_hint: 0.1,0.1
     background_color: 1,1
     canvas.before:
          Color:
               rgb: 0.1,0
          Rectangle:
               pos: self.pos
               size: self.size

<MainWindow@FloatLayout>:
     Button:
          text: "Up"
          pos_hint: {"x":0.8,"top":1}
          on_press: self.parent.pY= self.parent.pY +0.1
     Button:
          text: "Down"
          pos_hint: {"x":0.8,"top":0.8}
          on_press: self.parent.pY= self.parent.pY -0.1
     Button:
          text: "Left"
          pos_hint: {"x":0.7,"top":0.9}
          on_press: self.parent.pX = self.parent.pX -0.1
     Button:
          text: "Right"
          pos_hint: {"x":0.9,"top":0.9}
          on_press: self.parent.pX = self.parent.pX +0.1
     Tag:
          name: "L1"
          text: "move"
          pos_hint: {"x":self.parent.pX,"top":self.parent.pY}

解决方法

因此，我找到了解决问题的方法： 向小部件添加ID：

Tag:
          id: Tag_Layout
          name: "L1"
          text: "move"
          pos_hint: {"x":self.parent.pX,"top":self.parent.pY}

然后通过ID访问对象：

for wid in self.walk():
            if isinstance(wid,Button):
                if self.ids.Tag_Layout.collide_widget(wid):
                    self.pY -= .2

,

if Tag.collide_widget(Tag,wid):

这没有意义，Tag是类定义本身，它是Python代码中的抽象，与您的应用程序中的任何特定元素无关。您需要为您的应用中此类的特定实例调用collide_widget。