AS3 Juming/Gravity問題

Question

我遇到的問題是我不知道如何讓字符停止跳躍。

例如，當我經常打空間時，它一直跳躍跳躍。當我按下空格時，我希望它跳起來，而MC在跳躍時，我想禁用空格按鈕（或者如果可能的話，你還可以告訴我如何禁用MouseEvents），以便在空中MC只能跳一次。

var gravity = 0.8; 
var floor = 251; 
player.y = floor; 
player.speedY = 0; 
player.impulsion = 10; 
stage.addEventListener(Event.ENTER_FRAME, enterframe); 
function enterframe(e:Event) { 
    player.speedY += gravity; 
    player.y += player.speedY; 
    if(player.y > floor) { 
     player.speedY = 0; 
     player.y = floor 

    } 

} 
stage.addEventListener(KeyboardEvent.KEY_DOWN, space); 
function space(e:KeyboardEvent) { 
    if(e.keyCode == Keyboard.SPACE) { 
     player.speedY = -player.impulsion 
    } 
} 

Answer 1

我通常只是有一個像它設置爲true時，該層的土地，當他們跳設置爲false「onFloor」布爾變量。那麼只有讓他們跳起來，如果他們是onFloor。所以在這裏我已經將其設置爲true，你if(player.y > floor)內，假if(e.keyCode == Keyboard.SPACE && onFloor)後：

var gravity = 0.8; 
var floor = 251; 
var onFloor:Boolean = false; 

player.y = floor; 
player.speedY = 0; 
player.impulsion = 10; 
stage.addEventListener(Event.ENTER_FRAME, enterframe); 
function enterframe(e:Event) { 
    player.speedY += gravity; 
    player.y += player.speedY; 
    if(player.y > floor) { 
     player.speedY = 0; 
     player.y = floor; 
     onFloor = true; 
    } 

} 
stage.addEventListener(KeyboardEvent.KEY_DOWN, space); 
function space(e:KeyboardEvent) { 
    if(e.keyCode == Keyboard.SPACE && onFloor) { 
     player.speedY = -player.impulsion; 
     onFloor = false; 
    } 
}