AS3 - TypeError：MethodInfo 中的错误 #1009 “null”
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【中文标题】AS3 - TypeError：MethodInfo 中的错误 #1009 “null”【英文标题】：AS3 - TypeError: Error #1009 "null" at MethodInfo 【发布时间】：2017-05-18 23:32:51 【问题描述】：我有这个小项目。每次单击按钮时都会更改的帧，以及箭头内的进度条模拟。
stop();
/** initializtios **/
var trans:ColorTransform = next_arrow.transform.colorTransform;
var p:int = 1;
var myColorTransform = new ColorTransform();
myColorTransform.color = 0x42f498;
var trans1:ColorTransform = back_arrow.transform.colorTransform;
/** actual code **/
btn_next_arrow.addEventListener(MouseEvent.CLICK, function goNextLectFrame(e:MouseEvent):void
if (p==1)
fill_1.transform.colorTransform = myColorTransform;
fill_22.alpha = 0.00001;
fill_3.alpha = 0.00001;
fill_33.alpha = 0.00001;
fill_5.alpha = 0.00001;
fill_6.alpha = 0.00001;
fill_7.alpha = 0.00001;
fill_8.alpha = 0.00001;
fill_9.alpha = 0.00001;
fill_10.alpha = 0.00001;
fill_11.alpha = 0.00001;
fill_12.alpha = 0.00001;
fill_13.alpha = 0.00001;
fill_14.alpha = 0.00001;
fill_151.alpha = 0.00001;
++p;
switch (currentFrame)
case 1:
gotoAndStop(2);
break;
case 2:
fill_22.transform.colorTransform = myColorTransform;
gotoAndStop(3);
break;
case 3:
fill_3.transform.colorTransform = myColorTransform;
gotoAndStop(4);
break;
case 4:
fill_33.transform.colorTransform = myColorTransform;
gotoAndStop(5);
break;
case 5:
fill_5.transform.colorTransform = myColorTransform;
gotoAndStop(6);
break;
case 6:
fill_6.transform.colorTransform = myColorTransform;
gotoAndStop(7);
break;
case 7:
fill_7.transform.colorTransform = myColorTransform;
gotoAndStop(8);
break;
case 8:
fill_8.transform.colorTransform = myColorTransform;
gotoAndStop(9);
break;
case 9:
fill_9.transform.colorTransform = myColorTransform;
gotoAndStop(10);
break;
case 10:
fill_10.transform.colorTransform = myColorTransform;
gotoAndStop(11);
break;
case 11:
fill_11.transform.colorTransform = myColorTransform;
gotoAndStop(12);
break;
case 12:
fill_12.transform.colorTransform = myColorTransform;
gotoAndStop(13);
break;
case 13:
fill_13.transform.colorTransform = myColorTransform;
gotoAndStop(14);
break;
case 14:
fill_14.transform.colorTransform = myColorTransform;
gotoAndStop(15);
break;
case 15:
fill_151.transform.colorTransform = myColorTransform;
gotoAndStop(16);
break;
case 16:
gotoAndStop(17);
break;
);
btn_next_arrow.addEventListener(MouseEvent.MOUSE_OVER, function hovering(e:MouseEvent):void
trans.color = uint(0x606266);
next_arrow.transform.colorTransform = trans;
);
btn_back_arrow.addEventListener(MouseEvent.MOUSE_OVER, function hovering1(e:MouseEvent):void
trans1.color = uint(0x606266);
back_arrow.transform.colorTransform = trans1;
);
btn_next_arrow.addEventListener (MouseEvent.MOUSE_OUT, function hideShadow(event:MouseEvent):void
trans.color = uint(0x999999);
next_arrow.transform.colorTransform = trans;
);
btn_back_arrow.addEventListener (MouseEvent.MOUSE_OUT, function hideShadow1(event:MouseEvent):void
trans1.color = uint(0x999999);
back_arrow.transform.colorTransform = trans1;
);
btn_back_arrow.addEventListener(MouseEvent.CLICK, function goPrevLectFrame(e:MouseEvent):void
switch(currentFrame)
case 2:
gotoAndStop(1);
break;
case 3:
gotoAndStop(2);
break;
case 4:
gotoAndStop(3);
break;
case 5:
gotoAndStop(4);
break;
case 6:
gotoAndStop(5);
break;
case 7:
gotoAndStop(6);
break;
case 8:
gotoAndStop(7);
break;
case 9:
gotoAndStop(8);
break;
case 10:
gotoAndStop(9);
break;
case 11:
gotoAndStop(10);
break;
case 12:
gotoAndStop(11);
break;
case 13:
gotoAndStop(12);
break;
case 14:
gotoAndStop(13);
break;
case 15:
gotoAndStop(14);
break;
case 16:
gotoAndStop(15);
break;
);
btn_main_menu.addEventListener(MouseEvent.CLICK, function goPrevLectFrame1(e:MouseEvent):void
gotoAndStop(17);
);
问题是当我到达最后一帧并单击下一步按钮时，它显示：
TypeError：错误 #1009：...“null”。在 函数/()[RECOVER_shitty_fla.MainTimeline::frame1:114]
这是导致函数的问题：
btn_next_arrow.addEventListener (MouseEvent.MOUSE_OUT, function hideShadow(event:MouseEvent):void
trans.color = uint(0x999999);
next_arrow.transform.colorTransform = trans; // LINE 114
);
我在这里真的很挣扎，将不胜感激任何帮助，在此先感谢。
【问题讨论】：
很可能，这意味着next_arrow 在该行运行时不存在。此外，侦听器上的内联函数是内存泄漏的快速通道。
@BadFeelingAboutThis 是的，我是这么想的，但我认为 next_arrow 确实存在于该帧上，只是在下一帧中不存在，单击按钮实际上会在将鼠标悬停在 next_arrow 上之后将我们带到。无论如何，谢谢。你的建议是关于内联函数的，我应该如何包装它们？
【参考方案1】：
您需要在进入最后一帧之前移除事件侦听器。您的程序仍在侦听该帧上不存在的对象上的MouseEvents。
此外，我会听取@BadFeelingAboutThis 的建议。 内联函数是不好的做法，通常应该避免。
此代码还有其他问题（大部分是小问题）。我已经从 FLA 文档中调整了您的代码以使程序正常工作。 请参阅下面的更改。
第 1-16 帧
stop();
import flash.events.MouseEvent;
import flash.system.fscommand;
import flash.display.StageScaleMode;
import flash.events.TimerEvent;
import flash.utils.Timer;
import flash.geom.ColorTransform;
/** initializtios **/
var trans:ColorTransform = next_arrow.transform.colorTransform;
var p:int = 1;
var myColorTransform = new ColorTransform();
myColorTransform.color = 0x42f498;
var trans1:ColorTransform = back_arrow.transform.colorTransform;
/** actual code **/
btn_next_arrow.addEventListener(MouseEvent.CLICK, goNextLectFrame);
function goNextLectFrame(e:MouseEvent):void
if (p==1)
fill_1.transform.colorTransform = myColorTransform;
fill_22.alpha = 0.00001;
fill_3.alpha = 0.00001;
fill_33.alpha = 0.00001;
fill_5.alpha = 0.00001;
fill_6.alpha = 0.00001;
fill_7.alpha = 0.00001;
fill_8.alpha = 0.00001;
fill_9.alpha = 0.00001;
fill_10.alpha = 0.00001;
fill_11.alpha = 0.00001;
fill_12.alpha = 0.00001;
fill_13.alpha = 0.00001;
fill_14.alpha = 0.00001;
fill_151.alpha = 0.00001;
++p;
switch (currentFrame)
case 1:
gotoAndStop(2);
break;
case 2:
fill_22.transform.colorTransform = myColorTransform;
gotoAndStop(3);
break;
case 3:
fill_3.transform.colorTransform = myColorTransform;
gotoAndStop(4);
break;
case 4:
fill_33.transform.colorTransform = myColorTransform;
gotoAndStop(5);
break;
case 5:
fill_5.transform.colorTransform = myColorTransform;
gotoAndStop(6);
break;
case 6:
fill_6.transform.colorTransform = myColorTransform;
gotoAndStop(7);
break;
case 7:
fill_7.transform.colorTransform = myColorTransform;
gotoAndStop(8);
break;
case 8:
fill_8.transform.colorTransform = myColorTransform;
gotoAndStop(9);
break;
case 9:
fill_9.transform.colorTransform = myColorTransform;
gotoAndStop(10);
break;
case 10:
fill_10.transform.colorTransform = myColorTransform;
gotoAndStop(11);
break;
case 11:
fill_11.transform.colorTransform = myColorTransform;
gotoAndStop(12);
break;
case 12:
fill_12.transform.colorTransform = myColorTransform;
gotoAndStop(13);
break;
case 13:
fill_13.transform.colorTransform = myColorTransform;
gotoAndStop(14);
break;
case 14:
fill_14.transform.colorTransform = myColorTransform;
gotoAndStop(15);
break;
case 15:
fill_151.transform.colorTransform = myColorTransform;
btn_next_arrow.removeEventListener(MouseEvent.MOUSE_OVER, hovering);
btn_next_arrow.removeEventListener(MouseEvent.MOUSE_OUT, hideShadow);
btn_back_arrow.removeEventListener(MouseEvent.MOUSE_OVER, hovering1);
btn_back_arrow.removeEventListener(MouseEvent.MOUSE_OUT, hideShadow1);
gotoAndStop(16);
break;
case 16:
gotoAndStop(17);
break;
btn_next_arrow.addEventListener(MouseEvent.MOUSE_OVER, hovering);
function hovering(e:MouseEvent):void
trans.color = uint(0x606266);
next_arrow.transform.colorTransform = trans;
btn_back_arrow.addEventListener(MouseEvent.MOUSE_OVER, hovering1);
function hovering1(e:MouseEvent):void
trans1.color = uint(0x606266);
back_arrow.transform.colorTransform = trans1;
btn_next_arrow.addEventListener (MouseEvent.MOUSE_OUT, hideShadow);
function hideShadow(event:MouseEvent):void
trans.color = uint(0x999999);
next_arrow.transform.colorTransform = trans;
btn_back_arrow.addEventListener (MouseEvent.MOUSE_OUT, hideShadow1);
function hideShadow1(event:MouseEvent):void
trans1.color = uint(0x999999);
back_arrow.transform.colorTransform = trans1;
btn_back_arrow.addEventListener(MouseEvent.CLICK, goPrevLectFrame);
function goPrevLectFrame(e:MouseEvent):void
switch(currentFrame)
case 2:
gotoAndStop(1);
break;
case 3:
gotoAndStop(2);
break;
case 4:
gotoAndStop(3);
break;
case 5:
gotoAndStop(4);
break;
case 6:
gotoAndStop(5);
break;
case 7:
gotoAndStop(6);
break;
case 8:
gotoAndStop(7);
break;
case 9:
gotoAndStop(8);
break;
case 10:
gotoAndStop(9);
break;
case 11:
gotoAndStop(10);
break;
case 12:
gotoAndStop(11);
break;
case 13:
gotoAndStop(12);
break;
case 14:
gotoAndStop(13);
break;
case 15:
gotoAndStop(14);
break;
case 16:
gotoAndStop(15);
break;
btn_main_menu.addEventListener(MouseEvent.CLICK, goPrevLectFrame1);
function goPrevLectFrame1(e:MouseEvent):void
gotoAndStop(17);
第 17 帧
stop();
import flash.events.MouseEvent;
btn_goto_lect1.alpha = 0.00001;
btn_goto_pract.alpha = 0.00001;
btn_goto_lect1.addEventListener (MouseEvent.MOUSE_OVER, showShadow);
function showShadow(event:MouseEvent):void
btn_goto_lect1.alpha = 1;
btn_goto_lect1.addEventListener (MouseEvent.MOUSE_OUT, hideShadow_);
function hideShadow_(event:MouseEvent):void
btn_goto_lect1.alpha = 0.00001;
btn_goto_pract.addEventListener (MouseEvent.MOUSE_OVER, showShadow1);
function showShadow1(event:MouseEvent):void
btn_goto_pract.alpha = 1;
btn_goto_pract.addEventListener (MouseEvent.MOUSE_OUT, hideShadow2);
function hideShadow2(event:MouseEvent):void
btn_goto_pract.alpha = 0.00001;
btn_goto_lect1.addEventListener (MouseEvent.CLICK, showShadow3);
function showShadow3(event:MouseEvent):void
btn_goto_lect1.removeEventListener (MouseEvent.MOUSE_OVER, showShadow);
btn_goto_lect1.removeEventListener (MouseEvent.MOUSE_OUT, hideShadow_);
btn_goto_pract.removeEventListener (MouseEvent.MOUSE_OVER, showShadow1);
btn_goto_pract.removeEventListener (MouseEvent.MOUSE_OUT, hideShadow2);
gotoAndStop(1);
【讨论】：
亲爱的@phasma，非常感谢，现在它就像手表一样工作。更重要的是，感谢您澄清 removeListener，我正在慢慢进入 as3。我一定会坚持你关于内联函数的建议。再次感谢您！对不起，你必须为我工作的代码质量:) @Monstryyy 在您听取建议的同时...将代码放入一帧中，将任何多帧视觉效果放入舞台上的 MovieCip（与代码相同的帧 1，但新的不同层），然后使用一帧代码来控制“内容”MClip 本身移动到其他帧...这意味着您的代码不必在stage 的其他帧上重复，但您可以通过 MClip 显示新帧（所以它必须与舞台大小相同）。 PS：您可以从舞台剪切/粘贴帧到 MC。此外，如果需要，您可以选择对象并右键单击将其转换为 MClip 等。
@VC.One 谢谢建议。是的，我明白你的建议，似乎比我的意大利面条代码更有效率。谢谢，现在我需要考虑一下。以上是关于AS3 - TypeError：MethodInfo 中的错误 #1009 “null”的主要内容，如果未能解决你的问题，请参考以下文章
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