我试图让我的玩家图像在 on_touch_move 事件触发时移动。我尝试使用 DragBehaviour,但没有成功。同样,更新玩家图像的 x 坐标也没有效果。
代码
from kivy.lang import Builder
from kivy.app import App
from kivy.uix.image import Image
from kivy import Config
from kivy.uix.screenmanager import ScreenManager, Screen, FadeTransition
from kivy.uix.widget import Widget
from kivy.properties import NumericProperty, ReferenceListProperty,\
StringProperty
from kivy.clock import Clock
from kivy.vector import Vector
from random import randint
Builder.load_string('''
<Ball>:
size_hint: None, None
source: '58-Breakout-Tiles.png'
pos: self.pos
size: 15, 15
<Player>:
size_hint: None, None
source: '49-Breakout-Tiles.png'
pos: self.pos
size: 60, 30
<SettingsScreen>:
close: close
AnchorLayout:
anchor_x: 'left'
anchor_y: 'top'
Image:
id: close
size_hint: .03, .03
source: 'grey_crossGrey.png'
GridLayout:
cols: 2
Label:
font_name: "vgafix.fon"
text: 'Music: '
Switch:
active: True
Label:
font_name: "vgafix.fon"
text: 'Sounds: '
Switch:
active: True
<MenuScreen>:
cog: cog
AnchorLayout:
anchor_x: 'right'
anchor_y: 'top'
Image:
id: cog
size_hint: .03, .03
source: 'settings-cog.png'
BoxLayout:
orientation: 'vertical'
Image:
source: "brickbreaker log.png"
Label:
font_name: "vgafix.fon"
text: 'Tap to start'
<GameScreen>:
ball: ball
player: player
cog: cog
AnchorLayout:
anchor_x: 'right'
anchor_y: 'top'
Image:
id: cog
size_hint: .03, .03
source: 'settings-cog.png'
Ball:
id: ball
size_hint: None, None
center: self.parent.center
Player:
id: player
size_hint: None, None
''')
Config.set('graphics', 'multisamples', '0')
class Ball(Image):
velocityX, velocityY = NumericProperty(0), NumericProperty(0)
velocity = ReferenceListProperty(velocityX, velocityY)
def move(self):
self.pos = Vector(*self.velocity) + self.pos
class Player(Image):
def __init__(self, **kwargs):
super(Player, self).__init__(**kwargs)
def on_touch_move(self, touch):
if self.collide_point(*touch.pos):
if (self.x >= 0) and (self.x <= self.width - 15):
self.x += (abs(self.x - touch.x))
class Brick(Image):
pass
class SettingsScreen(Screen):
def __init__(self, **kwargs):
super(SettingsScreen, self).__init__(**kwargs)
self.previous = StringProperty('')
def on_touch_down(self, touch):
if self.close.collide_point(*touch.pos):
self.manager.current = self.previous
class MenuScreen(Screen):
def on_touch_down(self, touch):
if self.cog.collide_point(*touch.pos):
self.manager.get_screen('settings').previous = self.manager.current
self.manager.current = 'settings'
else:
self.manager.transition = FadeTransition()
self.manager.current = 'game'
class GameScreen(Screen):
def __init__(self, **kwargs):
super(GameScreen, self).__init__(**kwargs)
self.initWidgets()
def on_pre_enter(self, *args):
self.interval = Clock.schedule_interval(self.update, 1.0 / 60.0)
def on_touch_down(self, touch):
if self.cog.collide_point(*touch.pos):
self.manager.get_screen('settings').previous = self.manager.current
self.manager.current = 'settings'
def initWidgets(self):
self.ball.center = self.center
self.ball.velocity = Vector(0, 4).rotate(randint(0, 360))
self.player.pos_hint = {'top': 0.1, 'right': 0.6}
def update(self, dt):
self.ball.move()
if (self.ball.y < 0) or (self.ball.y > self.height - 15):
self.ball.velocityY *= -1
# bounce off left and right
if (self.ball.x < 0) or (self.ball.x > self.width - 15):
self.ball.velocityX *= -1
def on_pre_leave(self, *args):
self.interval.cancel()
sm = ScreenManager(transition=FadeTransition())
sm.add_widget(MenuScreen(name='menu'))
sm.add_widget(GameScreen(name='game'))
sm.add_widget(SettingsScreen(name='settings'))
class BrickBreakerInsanityApp(App):
def build(self):
return sm
if __name__ == '__main__':
BrickBreakerInsanityApp().run
代码资源(必需):
https://drive.google.com/open?id=1GAnv5DfjNUuAXTybmsan90Dm0OuSVOfb
/image/rR799.png
/image/ngYvL.png
/image/AuxI3.png
/image/ypd7C.png
/image/rNvLz.png
根本原因
播放器小部件没有移动,因为 self.player.pos_hint = {'top': 0.1, 'right': 0.6}
解决方案
kv 文件
- 从方法
initWidgets()
中删除 self.player.pos_hint = {'top': 0.1, 'right': 0.6}
片段 - kv
Ball:
id: ball
center: root.center
Player:
id: player
y: root.height * 0.1 - self.height
x: root.width * 0.6 - self.width
Py 文件
- 将方法
on_touch_move()
添加到 class Player()
或 class GameScreen()
中:
代码片段 - Py:方法 1
class Player(Image):
def on_touch_move(self, touch):
if (touch.x >= 0) and (touch.x <= self.parent.width - self.width):
self.x = touch.x
return True
return super(Player, self).on_touch_move(touch)
...
class GameScreen(Screen):
...
def initWidgets(self):
self.ball.velocity = Vector(0, 4).rotate(randint(0, 360))
代码片段 - Py:方法 2
class Player(Image):
pass
...
class GameScreen(Screen):
...
def initWidgets(self):
self.ball.velocity = Vector(0, 4).rotate(randint(0, 360))
...
def on_touch_move(self, touch):
if (touch.x >= 0) and (touch.x <= self.width - self.player.width):
self.player.x = touch.x
return True
return super(GameScreen, self).on_touch_move(touch)
我是一名优秀的程序员,十分优秀!