玩家移动问题

Question

我试着让我的角色一次朝一个方向移动，结果成功了。。。有点字符的上下移动是错误的——它要求用户按住W/S/↓/↑用于玩家在上/下方向上移动。

我不知道为什么会发生这种情况，因为角色的左右运动都很好——也就是说，角色随着用户输入按下一次按钮而移动（a/D/←/→）。请注意，这是Python 2.7。

代码：

 # Import modules
import sys, pygame, os, random, Tkinter, ttk, math
from pygame import *
from random import *
from Tkinter import *
from ttk import *
from math import *
class Application(Frame):
    # Game Menu Setup
    def __init__(self, master):
        Frame.__init__(self,master)
        self.grid()
        self.create_buttons()
    def Collision(self):
        pass 
    def create_buttons(self):
        self.button = Button(self)
        self.button["text"] = "Play Game"
        self.button["command"] = self.Game
        self.button.grid(row=0, column=1)
        self.button1 = Button(self)
        self.button1["text"] = "Help / Instructions"
        self.button1["command"] = self.Instructions
        self.button1.grid(row=0, column=2)
        self.button2 = Button(self)
        self.button2["text"] = "Quit"
        self.button2["command"] = self.Quit
        self.button2.grid(row=0, column=3)
    # Main Class
    def Game(self):
        # Initialise Pygame + Clock
        pygame.init()
        mainClock = pygame.time.Clock()
        pygame.mouse.set_visible(False)
        # Image Setup
        Cursor = pygame.image.load("Cursor.png")
        Food = pygame.image.load("Food.png")
        Background = pygame.image.load("Wallpaper.jpg")
        # Food Setup
        FoodImage = pygame.Surface((20, 20))
        # Music Setup
        pygame.mixer.music.load("Helix Nebula.mp3")
        # Window Setup
        WINDOWHEIGHT = 600 #set standard values
        WINDOWWIDTH = 800
        windowSurface = pygame.display.set_mode((WINDOWWIDTH, WINDOWHEIGHT))
        pygame.display.set_caption('The Basilisk')
        # Player Drawing
        player = pygame.Rect(50, 50, 50, 50)
        # Movement Variables
        moveLEFT = False
        moveRIGHT = False
        moveUP = False
        moveDOWN = False
        MOVESPEED = 7
        # Score Setup
##        Score = 0
##        print score
        # Game Loop & Events
        while True:
            for event in pygame.event.get():
                if event.type == QUIT:
                    pygame.quit()
                    sys.exit()
                # Change the keyboard variables
                elif event.type == KEYDOWN:                
                    if event.key == K_LEFT or event.key == ord('a'):
                        moveLEFT = True
                        moveRIGHT = False
                        moveUP = False
                        moveDOWN = False
                        movex = 0.5
                        movey = 0
                    if event.key == K_RIGHT or event.key == ord('d'):
                        moveRIGHT = True
                        moveLEFT = False
                        moveUP = False
                        moveDOWN = False
                        movex = -0.5
                        movey = 0
                    if event.key == K_UP or event.key == ord('w'):
                        moveUP = True
                        moveLEFT = False
                        moveRIGHT = False
                        moveDOWN = False
                        movey = 0.5
                        movex = 0
                    if event.key == K_DOWN or event.key == ord('s'):
                        moveDOWN = True
                        moveLEFT = False
                        moveRIGHT = False
                        moveUP = False
                        movey = -0.5
                        movex = 0
                    if event.key == ord('o'):
                        pygame.mixer.music.pause()
                    if event.key == ord('r'):
                        pygame.mixer.music.play()
                    if event.key == ord('p'): 
                        pygame.mixer.music.unpause()
                elif event.type == KEYUP:
                    if event.key == K_ESCAPE:
                        pygame.quit()
                        sys.exit()                        
                    elif event.key == K_LEFT or event.key == ord('a'):
                        moveLEFT = True
                        moveRIGHT = False
                        moveUP = False
                        moveDOWN = False
                    elif event.key == K_RIGHT or event.key == ord('d'):
                        moveRIGHT = True
                        moveLEFT = False
                        moveUP = False
                        moveDOWN = False
                    elif event.key == K_UP or event.key == ord ('w'):
                        moveUP = True
                        moveLEFT = False
                        moveUP = False
                        moveDOWN = False
                    elif event.key == K_DOWN or event.key == ord('s'):
                        moveDOWN = True
                        moveLEFT = False
                        moveUP = False
                        moveDOWN = False
            # Loading Image(s) Setup
            windowSurface.blit(Background, (0,0))
            windowSurface.blit(Food, (15, 15))
            # Player Movement Setup
            if moveDOWN and player.bottom < WINDOWHEIGHT:
                player.top += MOVESPEED
            if moveUP and player.top > 0:
                player.top-= MOVESPEED
            if moveLEFT and player.left > 0:
                player.left -= MOVESPEED
            if moveRIGHT and player.right < WINDOWWIDTH:
                player.right += MOVESPEED
            # Mouse Setup
            mousex, mousey = pygame.mouse.get_pos()
            mousex -= Cursor.get_width()/2
            mousey -= Cursor.get_height()/2
            # Final Update + Character Loading
            pygame.draw.rect(windowSurface, pygame.Color('green'), player)
            windowSurface.blit(Cursor, (mousex, mousey))
            pygame.display.update()
            mainClock.tick(60)
    # Quit Screen
    def Quit(self):
        os._exit(0)
    # Instructions Screen
    def Instructions(self):
        root.title("Instructions")
        root.geometry("260x200")
        app = Frame(root)
        app.grid()
        label_1 = Label(app, text = "The Point of the game is to eat")
        label_2 = Label(app, text = "as many chicks as possible using")
        label_3 = Label(app, text = "the 'Basilisk'. The character controls")
        label_4 = Label(app, text = "the Basilisk using the WASD / arrow keys.")
        label_5 = Label(app, text = "Press the 'Escape' key to exit.")
        label_6 = Label(app, text = "Press the 'o' key to pause the music,")
        label_7 = Label(app, text = "'p' key to unpause the music, and")
        label_8 = Label(app, text = "'r' to restart / play the music.")
        label_1.grid()
        label_2.grid()
        label_3.grid()
        label_4.grid()
        label_5.grid()
        label_6.grid()
        label_7.grid()
        label_8.grid()
# Final Settings for Menu
root = Tk()
root.title("Navigation")
root.geometry("260x25")
app = Application(root)
root.mainloop()

上面的代码会发生的情况是，玩家会点击"玩游戏"按钮，游戏窗口会打开，玩家会控制一个绿色方块，并将其向左、向右、向上和向下移动。

当玩家左右移动时，他们只需要按下A或D→ONCE使正方形向左/向右移动。上下方向的情况不同。只要用户提供输入，字符就会移动，即按键W或S或↑以使正方形在所述方向上移动。我该怎么解决这个问题？

Answer 1

您的event.type==KEYUP:条件似乎有问题：
你在设置false上下运动后，将它们设置为true
检查此代码：
请参阅最后两个if-else语句中的注释

elif event.type == KEYUP:
    if event.key == K_ESCAPE:
        pygame.quit()
        sys.exit()                        
    elif event.key == K_LEFT or event.key == ord('a'):
        moveLEFT = True
        moveRIGHT = False
        moveUP = False
        moveDOWN = False
    elif event.key == K_RIGHT or event.key == ord('d'):
        moveRIGHT = True
        moveLEFT = False
        moveUP = False
        moveDOWN = False
    elif event.key == K_UP or event.key == ord ('w'):
        moveUP = True
        moveLEFT = False
        moveUP = False   ##This line is faulty moveRIGHT=FALSE should be used instead
        moveDOWN = False
    elif event.key == K_DOWN or event.key == ord('s'):
        moveDOWN = True
        moveLEFT = False
        moveUP = False
        moveDOWN = False   ##This line is faulty moveRIGHT=FALSE should be used instead

建议：
您可以在您认为可能存在错误的代码部分使用print语句。
然后跟踪打印的记录，看看哪些地方运行良好，哪些地方不正常
这会让你对这个bug有一个大致的了解
它是白盒测试的一部分

Answer 2

看起来你复制了连续移动的代码，并试图对其进行调整。如果你想在按下按钮后立即移动，请让你的KEYDOWN事件直接更改玩家的位置。

如果你想设置运动的动画，事情会变得更复杂：你必须有两种状态：移动和站立。当你站着的时候，你会监听KEYDOWN事件，然后触发向所需方向移动（如果有的话）。如果移动，您将忽略KEYDOWN事件（或者如果您想获得真正的高级，则将其存储以便稍后使用），并在到达目标广场后再次切换为站立。

此外，如果你想支持这两种运输模式（按键或按住键），你必须添加额外的逻辑。。。也许可以查看pygame.key.get_pressed（），看看你是否应该从移动过渡到站立，或者只是继续移动另一个方块。