Question

我正在编码打砖块，而我的第三和第四条Elif条件被忽略了。

为了区分水平或横向击打砖块侧面以相应地改变球的方向，我指定了一个连续检查的5像素边距。我的代码正确地确定了球何时落在顶部或底部边缘，但是即使我以相同的方式编写了这些条件，球也只是穿过了侧面。我知道该语句被完全忽略了，因为该语句的所有功能都被忽略了。

砖块中用于指定边距的边界标记的末尾带有B

def collision(self):
    if (ball.xcor() > self.colisL) and (ball.xcor() < self.colisR) and (ball.ycor() > self.colisD) and (ball.ycor() < self.colisDB):
        self.turtle.hideturtle()
        ball.dy *= -1
        self.colisU = 1000
        self.colisD = 1000
        self.colisL = 1000
        self.colisR = 1000
        global score
        score += 1
    elif (ball.xcor() > self.colisL) and (ball.xcor() < self.colisR) and (ball.ycor() < self.colisU) and (ball.ycor() > self.colisUB):
        self.turtle.hideturtle()
        ball.dy *= -1
        self.colisU = 1000
        self.colisD = 1000
        self.colisL = 1000
        self.colisR = 1000
        score += 1
    elif (ball.xcor() > self.colisL) and (ball.xcor() < self.colisLB) and (ball.ycor() > self.colisD) and (ball.ycor() < self.colisU):
        self.turtle.hideturtle()
        ball.dx *= -1
        self.colisU = 1000
        self.colisD = 1000
        self.colisL = 1000
        self.colisR = 1000
        score += 1
    elif (ball.xcor() > self.colisR) and (ball.xcor() < self.colisRB) and (ball.ycor() > self.colisU) and (ball.ycor() < self.colisU):
        self.turtle.hideturtle()
        ball.dx *= -1
        self.colisU = 1000
        self.colisD = 1000
        self.colisL = 1000
        self.colisR = 1000
        score += 1

Answer 1

if ... elif ... else

的语法

if test expression:
    Body of if
elif test expression:
    Body of elif
else: 
    Body of else

Elif语句被忽略

1 个答案: