Question

我正在使用Adobe Flash CS6学习AS3，我正在编写一个教程，使用KeyboardEvent创建一个带有动画的移动对象，它运行得很好但现在我想改变它所以我可以使用屏幕上的按钮（MouseEvent s）移动角色，但我不确定如何去做。

var movingRight;
var movingLeft;

function onKeyPress(e:KeyboardEvent):void
{
    if(e.keyCode == Keyboard.RIGHT){
        movingRight=1;
    }
    else if(e.keyCode == Keyboard.LEFT){
        movingLeft=1;
    }
}

Answer 1

要移动character使用按钮，您必须使用两个MouseEvent：按下按钮时发生MouseEvent.MOUSE_DOWN事件，发布时MouseEvent.MOUSE_UP发布LeftBTN.addEventListener(MouseEvent.MOUSE_DOWN, LeftBTN_onPress); LeftBTN.addEventListener(MouseEvent.MOUSE_UP, LeftBTN_onRelease); function LeftBTN_onPress(e:MouseEvent):void { movingLeft = 1; } function LeftBTN_onRelease(e:MouseEvent):void { character.gotoAndStop(1); movingLeft = 0; } RightBTN.addEventListener(MouseEvent.MOUSE_DOWN, RightBTN_onPress); RightBTN.addEventListener(MouseEvent.MOUSE_UP, RightBTN_onRelease); function RightBTN_onPress(e:MouseEvent):void { movingRight = 1; } function RightBTN_onRelease(e:MouseEvent):void { character.gotoAndStop(4); movingRight = 0; } ，所以你可以这样做：

stage.addEventListener(KeyboardEvent.KEY_DOWN, move_character);
stage.addEventListener(KeyboardEvent.KEY_UP, move_character);
LeftBTN.addEventListener(MouseEvent.MOUSE_DOWN, move_character);
LeftBTN.addEventListener(MouseEvent.MOUSE_UP, move_character);
RightBTN.addEventListener(MouseEvent.MOUSE_DOWN, move_character);
RightBTN.addEventListener(MouseEvent.MOUSE_UP, move_character);

function move_character(e:*){

    var event_type:String = e.type;                     // get event type : to identify which kind of event is fired
    var current_target:String = e.currentTarget.name;   // get target name : to identify the target of the fired event

    switch (event_type){

        case MouseEvent.MOUSE_DOWN :

            if(current_target == 'LeftBTN') movingLeft = 1;
            else movingRight = 1;

            break;

        case MouseEvent.MOUSE_UP:

            if(current_target == 'LeftBTN'){
                character.gotoAndStop(1);
                movingLeft = 0;
            } else {
                character.gotoAndStop(4);
                movingRight = 0;
            }           
            break;      

        case KeyboardEvent.KEY_DOWN:

            if (e.keyCode == Keyboard.RIGHT){           
                movingRight = 1;            
            } else if (e.keyCode == Keyboard.LEFT) {            
                movingLeft = 1;         
            }           
            break;

        case KeyboardEvent.KEY_UP:

            if (e.keyCode == Keyboard.LEFT) {           
                character.gotoAndStop(1);
                movingLeft = 0;         
            } else if (e.keyCode == Keyboard.RIGHT) {           
                character.gotoAndStop(4);
                movingRight = 0;            
            }
            break;
    }

}

您还可以为所有事件监听器使用一个函数，如下所示：

或者，使用Event参数作为function move_character(e:Event){ var event_type:String = e.type; // get event type : to identify which kind of event is fired var current_target:String = e.currentTarget.name; // get target name : to identify the target of the fired event var key_code:Number; switch (event_type){ case MouseEvent.MOUSE_DOWN : if(current_target == 'LeftBTN') movingLeft = 1; else movingRight = 1; break; case MouseEvent.MOUSE_UP: if(current_target == 'LeftBTN'){ character.gotoAndStop(1); movingLeft = 0; } else { character.gotoAndStop(4); movingRight = 0; } break; case KeyboardEvent.KEY_DOWN: key_code = KeyboardEvent(e).keyCode; if (key_code == Keyboard.RIGHT){ movingRight = 1; } else if (key_code == Keyboard.LEFT) { movingLeft = 1; } break; case KeyboardEvent.KEY_UP: key_code = KeyboardEvent(e).keyCode; if (key_code == Keyboard.LEFT) { character.gotoAndStop(1); movingLeft = 0; } else if (key_code == Keyboard.RIGHT) { character.gotoAndStop(4); movingRight = 0; } break; } }：

{{1}}

希望可以提供帮助。

Answer 2

在舞台上放两个按钮，将它们命名为btnRight和btnLeft，然后使用此代码

btnLeft.addEventListener(MouseEvent.CLICK, onButtonClick, false, 0, true);
btnRight.addEventListener(MouseEvent.CLICK, onButtonClick, false, 0, true);

function onButtonClick(evt:MouseEvent) {
    if (evt.target == btnLeft) movingLeft = 1;
    else movingRight = 1;
}

我还建议只使用一个名为movingDirection的var，它可以是1,0或-1：）

AS3将键盘事件更改为鼠标事件

2 个答案: