如何在kivy中短时间显示标签？

#import kivy #kivyVersion = kivy.__version__ # check kivy version from kivy.app import App from kivy.uix.widget import Widget from kivy.properties import NumericProperty, StringProperty, ReferenceListProperty, ObjectProperty from kivy.vector import Vector from kivy.clock import Clock class Ball(Widget): Vx = NumericProperty(0) Vy = NumericProperty(0) Velocity = ReferenceListProperty(Vx, Vy) def Move(self): self.pos = Vector(*self.Velocity) + self.pos class Paddle(Widget): score = StringProperty("0") # set the score label be a string with text "0" at the beginning def Bounce(self, ball): # to make the ball move faster when touched the paddle --> increase difficulty + more fun if self.collide_widget(ball): Vx, Vy = ball.Velocity # unpack the ball.Velocity offset = (ball.center_y - self.center_y) / (self.height / 2) bounce = Vector((Vx * -1), Vy) bouncedVelocity = bounce * 1.1 ball.Velocity = bouncedVelocity.x, bouncedVelocity.y + offset class PongGame(Widget): # ref. mypong.kv ball = ObjectProperty(None) leftplayer = ObjectProperty(None) rightplayer = ObjectProperty(None) duce = StringProperty() GameOver = False def ServeBall(self, v = (4, 0)): self.ball.center = self.center # set the cennter of the ball at the center of the screen self.ball.Velocity = v # start velocity # Vector(4, 0).rotate(randint(0, 360)) # randomly set a Vx and Vy for the ball def Update(self, dt): self.ball.Move() # Move() function to make the ball move with constant v self.leftplayer.Bounce(self.ball) # bounce when touched player paddle self.rightplayer.Bounce(self.ball) if self.ball.y < self.y or self.ball.top > self.top: # touch bottom or top --> bounce self.ball.Vy *= -1 # same velocity by in opposite direction if self.ball.x < self.x: # touch left --> bounce and rightplayer score += 1 self.rightplayer.score = str(int(self.rightplayer.score) + 1) self.ball.Vx *= -1 self.ServeBall(v = (4, 0)) if self.ball.right > self.width: # touch right --> bounce and leftplayer score += 1 self.leftplayer.score = str(int(self.leftplayer.score) + 1) self.ball.Vx *= -1 self.ServeBall(v = (-4, 0)) def Duce(): # duce | when one of the player score 10 . two player 's score different == 1 self.GameOver = False Duce() ###################### if int(self.leftplayer.score) == 11 or int(self.rightplayer.score) == 11: # display the text "Duse !" for a short while self.duce = "Duce !" else: self.duce = "" ###################### if self.leftplayer.score != self.rightplayer.score: try: if int(self.leftplayer.score) >= 10 or int(self.rightplayer.score) >= 10: if int(self.leftplayer.score) - int(self.rightplayer.score) == 1 or int(self.leftplayer.score) - int(self.rightplayer.score) == -1: Duce() elif int(self.leftplayer.score) - int(self.rightplayer.score) >= 2 or int(self.leftplayer.score) - int(self.rightplayer.score) <= -2: self.GameOver = True self.ServeBall(v = (0, 0)) # set the ball rest on the screen 's center if int(self.leftplayer.score) > int(self.rightplayer.score): self.leftplayer.score = "You Win !" # change label text self.rightplayer.score = "Ops !" # change label text elif int(self.rightplayer.score) > int(self.leftplayer.score): self.leftplayer.score = "Ops !" # change label text self.rightplayer.score = "You Win !" # change label text except RecursionError: pass except ValueError: pass except Exception as e: print("Error :", e) def on_touch_move(self, touch): # | widget | function name must be on_touch_move if touch.x < (self.width / 3): self.leftplayer.center_y = touch.y if touch.x > (self.width - self.width / 3): self.rightplayer.center_y = touch.y if self.GameOver == True: # when game is over if touch.x < self.width: # when player toch screen --> reset all self.GameOver = False self.leftplayer.score = "0" self.rightplayer.score = "0" self.ServeBall() class MyPongApp(App): # name of the .kv file should be the text before "App" # start up def build(self): self.title = "My First Kivy Game" Game = PongGame() # creating obj for class PongGame Game.ServeBall() # run class PongGame function ServeBall() Clock.schedule_interval(Game.Update, 1.0/120.0) return Game if __name__ == "__main__": MyPongApp().run()

#:kivy 2.0.0 <Ball>: size: 50, 50 canvas: Ellipse: pos: self.pos size: self.size <Paddle>: size: 25, 200 canvas: Rectangle: pos: self.pos size: self.size <PongGame>: ball: myBall leftplayer: left_player rightplayer: right_player canvas: Rectangle: pos: self.center_x - 5, 0 size: 10, self.height Label: font_size: 70 center_x: root.width / 4 top: root.top - 50 text: root.leftplayer.score Label: font_size: 70 center_x: root.width * 3 / 4 top: root.top - 50 text: root.rightplayer.score Label: font_size: 70 center_x: root.width /2 center_y: root.top / 2 text: root.duce Ball: id: myBall center: self.parent.center Paddle: id: left_player x: root.x center_y: root.center_y Paddle: id: right_player x: root.width - self.width center_y: root.center_y

##################### if int(self.leftplayer.score) == 11 or int(self.rightplayer.score) == 11: # display the text "Duse !" for a short while self.duce = "Duce !" else: self.duce = "" ######################

1条回答

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1楼 · 发布于 2024-09-29 21:50:17

您可以使用Clock对象参考文档here

这就是在1秒后隐藏标签的方式。这将隐藏标签，而不仅仅是删除文本。但是，您应该为标签提供一个id，以便能够修改属性

from kivy.clock import Clock


def hide_label(dt):
    self.ids.[labelId].size_hint_x=0 # to hide the label best practice is setting size to 0

self.ids.[labelId].size_hint_x=1 # Show the label 
Clock.schedule_once(hide_label, 1)

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