球不动AS3
球不动AS3
提问于 2017-06-21 09:15:45
我一直在学习如何在as3中制作一个简单的高尔夫游戏。当我移动手机时，球应该会移动，但出于某种原因它不会移动：高尔夫游戏形象
到目前为止，这是我的外部代码：
package {
import flash.events.Event;
public class golf extends MovieClip {
public function golf() {
stop();
startbtn.addEventListener(MouseEvent.CLICK, fl_ClickToGoToNextScene);
fl_Accelerometer.addEventListener(AccelerometerEvent.UPDATE, fl_AccelerometerUpdateHandler);
ball.addEventListener(Event.ENTER_FRAME, moveBall);
ball.addEventListener(Event.ENTER_FRAME, targethit);
}
var accelX:Number;
var accelY:Number;
var fl_Accelerometer:Accelerometer = new Accelerometer();
function fl_AccelerometerUpdateHandler(event:AccelerometerEvent):void
{
accelX = event.accelerationX;
accelY = event.accelerationY;
}
function moveBall(evt:Event){
ball.x -= accelX*30;
ball.y += accelY*30;
if(ball.x > (480-ball.width/2)){
ball.x = 480-ball.width/2;
}
if(ball.x < (0+ball.width/2)){
ball.x = 0+ball.width/2;
}
if(ball.y > (800-ball.width/2)){
ball.y = 800-ball.width/2;
}
if(ball.y < (0+ball.width/2)){
ball.y = 0+ball.width/2;
}
}
function targethit(e:Event):void {
if (ball.hitTestObject(hole1)) {
gotoAndStop(1, "End");
}
}
function fl_ClickToGoToNextScene(event:MouseEvent):void
{
MovieClip(this.root).nextScene();
}
}
}到目前为止出现的错误：
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at accelerometer()[C:\Users\HP\Downloads\GOLF\accelerometer.as:14]
at runtime::ContentPlayer/loadInitialContent()
at runtime::ContentPlayer/playRawContent()
at runtime::ContentPlayer/playContent()
at runtime::AppRunner/run()
at ADLAppEntry/run()
at global/runtime::ADLEntry()回答 1
Stack Overflow用户
回答已采纳
发布于 2017-06-21 10:14:48
我用您的代码做了一个简单的测试，一个包含了所有不必要的东西的框架脚本，它适合我：
import flash.events.Event;
stage.align = StageAlign.TOP_LEFT;
stage.scaleMode = StageScaleMode.NO_SCALE;
var accelX:Number = 0;
var accelY:Number = 1;
var flAxx:Accelerometer = new Accelerometer;
flAxx.addEventListener(AccelerometerEvent.UPDATE, onAxxel);
addEventListener(Event.ENTER_FRAME, onFrame);
function onAxxel(e:AccelerometerEvent):void
{
accelX = e.accelerationX;
accelY = e.accelerationY;
}
function onFrame(e:Event):void
{
ball.x -= accelX * 30;
ball.y += accelY * 30;
ball.x = Math.max(ball.x, ball.width / 2);
ball.x = Math.min(ball.x, stage.stageWidth - ball.width / 2);
ball.y = Math.max(ball.y, ball.width / 2);
ball.y = Math.min(ball.y, stage.stageHeight - ball.width / 2);
}因此，问题很可能不是与代码有关，而是与您测试代码的方式有关。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/44671759
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