Kivy图像对撞机尺寸太大

在这种情况下,问题是 FloatLayout 使用size_提示在添加小部件时设置小部件的大小,因为它没有设置它,所以它们采用 (1, 1) ,即窗口的大小。

解决办法是 size_hint 到 (None, None) ,除了使用 allow_stretch 在里面 True 和 keep_ratio 在里面 False . 在代码中我设置了块 pos_hint 到 (0.5, 0.5) 它会把它固定在那个位置,这样它就不会移动,如果你想让它能够移动,你必须设置 pos ,而不是 POS U提示 .

from kivy.app import App
from kivy.lang import Builder
from kivy.clock import Clock
import random
import time
from kivy.uix.image import Image
from kivy.uix.widget import Widget
from kivy.uix.button import Button
from kivy.core.window import Window
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.screenmanager import ScreenManager, Screen


#############################################################################

class Collider(Image):
    pass

#############################################################################

root = FloatLayout()

class GameScreen(Screen):
    def __init__(self, **kwargs):
        super(GameScreen, self).__init__(**kwargs)
        self.wimg = Basic(size = (32,32), pos=(200, 100), source='sprite.png', size_hint=(None, None), allow_stretch=True, keep_ratio=False)
        self.block = Collider(size = (32,32), pos_hint={'x': 0.5, 'y':0.5}, source = 'block.png', size_hint=(None, None), allow_stretch=True, keep_ratio=False)

    def playy(self):
        root.add_widget(self.wimg)
        Clock.schedule_interval(self.wimg.update, 1.0 / 60.0)

    def worldgen1(self):
        self.add_widget(root)
        root.add_widget(self.block)

    def on_enter(self):
        self.worldgen1()
        self.playy()

#############################################################################

class Basic(Image):

    pFrame = 0

    def __init__(self, **kwargs):
        super(Basic, self).__init__(**kwargs)
        self._keyboard = Window.request_keyboard(None, self)
        if not self._keyboard:
            return
        self._keyboard.bind(on_key_down=self.on_keyboard_down)

    def on_keyboard_down(self, keyboard, keycode, text, modifiers):
        if keycode[1] == 'left':
            self.x -= 10
        elif keycode[1] == 'right':
            self.x += 10
        elif keycode[1] == 'up':
            self.y += 10
        elif keycode[1] == 'down':
            self.y -= 10
        else:
            return False
        return True

    def update(self, dt):
        self.pFrame += 1
        if self.parent.parent.block.collide_widget(self.parent.parent.wimg):
            print ("collide with", self.parent.parent.block)

#############################################################################

class MeinApp(App):

    def build(self):
        sm = ScreenManager()
        sm.add_widget(GameScreen(name='gameplay'))
        return sm

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