使用 Flash Builder 4.7、AIR 3.5、Flex 4.6.0(内部版本 23201)的最终版本，并运行/调试快速构建到运行 iOS 6.0.1 (10A523) 的 iPad2 MC981LL
我已经浪费了一天多的时间在我认为应该相当简单的事情上，但在这一点上我完全不知所措。任何帮助表示赞赏。
我没有收到任何错误消息。运行后该文件存在，但大小仅为 128 字节。不用说，它只能作为 NULL 读入。我什至在 writeObject 函数中实例化了一个 Object() ，只是为了确定不是我的更复杂的对象导致了困难(为了简单起见，我暂时将 bitmapData 和缩略图属性留空)。没有骰子。
除了我试图在对象中读回之外，我已经包含了所有相关代码。
不用说，这最初是一个具有读取和写入功能的简单类，随着我不断尝试获取有关失败原因的可用信息，它变得越来越复杂。最初没有跟踪语句，没有自定义 even 和调度程序，没有 try、catch、finally，也没有事件监听器，任何可以给我线索的东西。
此外，我可能做错了整个自定义事件/处理程序/监听器/调度程序，因为使整个球滚动的类中的 statusMessage(底部的最后一个代码块)显示“将图像和缩略图保存到库”但从来没有“文件保存到库”
非常感谢任何帮助。
这是我的踪迹:
[SWF] PictureToolsOnTheMoveMakeIt.swf - 4,154,904 bytes after decompression
FileSerializer FUNCTION writeObjectToFile()
FileStream.openAsync(write) finally
FileStream.writeError() finally
FileSerializer 类:
package classes
{
import flash.events.Event;
import flash.events.EventDispatcher;
import flash.events.IEventDispatcher;
import flash.events.IOErrorEvent;
import flash.errors.*;
import flash.filesystem.File;
import flash.filesystem.FileMode;
import flash.filesystem.FileStream;
import events.FileSerializerEvent;
import vo.PTotmImageVO;
[Event(name = "writeComplete", type = "events.FileSerializerEvent")]
[Event(name = "readComplete", type = "events.FileSerializerEvent")]
public class FileSerializer extends EventDispatcher
{
private var fileStream:FileStream = new FileStream();
public function FileSerializer(target:IEventDispatcher=null)
{
super(target);
} // End CONSTRUCTOR FileSerializer
public function writeObjectToFile(ptotmImageVO:PTotmImageVO, fnam e:String):void
{
trace("FileSerializer FUNCTION writeObjectToFile()");
var file:File = File.applicationStorageDirectory.resolvePath(ptotmImageVO.userid+"-"+ptotmImageVO.timestamp+".PTotmImageVO");
fileStream.addEventListener(Event.CLOSE, close);
fileStream.addEventListener(IOErrorEvent.IO_ERROR, ioErrorEventHandler);
try
{
fileStream.openAsync(file, FileMode.WRITE);
}
catch (e:SecurityError)
{
// The file location is in the application directory, and the fileMode parameter is set to "append",
// "update", or "write" mode.
trace("FileStream.openAsync(write) SecurityError "+e);
}
finally
{
trace("FileStream.openAsync(write) finally");
}
try
{
fileStream.writeObject(ptotmImageVO);
}
catch (e:IOError)
{
// The file has not been opened; the file has been opened, but it was not opened with write capabilities;
// or for a file that has been opened for synchronous operations (by using the open() method), the file
// cannot be written (for example, because the file is missing).
trace("FileStream.writeObject() IOError "+e);
}
finally
{
trace("FileStream.writeObject() finally");
}
} // End FUNCTION writeObjectToFile
protected function close(e:Event):void
{
trace("FileSerializer FUNCTION close()");
dispatchEvent(new FileSerializerEvent(FileSerializerEvent.WRITE_COMPLETE, null,true,true));
} // End FUNCTION close
protected function ioErrorEventHandler(event:Event):void
{
trace("FileSerializer FUNCTION ioErrorEventHandler()");
} // End FUNCTION ioErrorEventHandler
public function readObjectFromFile(fname:String):Object
{
var file:File = File.applicationStorageDirectory.resolvePath(fname);
if(file.exists)
{
var obj:Object;
var fileStream:FileStream = new FileStream();
fileStream.addEventListener(Event.COMPLETE, readComplete);
fileStream.open(file, FileMode.READ);
obj = fileStream.readObject();
fileStream.close();
return obj;
}
return null;
} // End FUNCTION readObjectFromFile
protected function readComplete(event:Event):void
{
dispatchEvent(new FileSerializerEvent(FileSerializerEvent.READ_COMPLETE, event.target));
} // End FUNCTION readComplete
} // End CONSTRUCTOR FileSerializer
} // End PACKAGE classes
值对象类:
package vo
{
import flash.display.BitmapData;
[remoteClass(alias="PTotmImageVO")]
public class PTotmImageVO
{
public var userid:String;
public var thumbnail:BitmapData;
public var image:BitmapData;
public var timestamp:Number;
public var description:String;
public var type:String;
public function PTotmImageVO()
{
} // End Constructor PTotmImageVO
} // End Class PTotmImageVO
} // End Package vo
事件类 FileSerializerEvent:
package events
{
import flash.events.Event;
public class FileSerializerEvent extends Event
{
public static const WRITE_COMPLETE:String = "writeComplete";
public static const READ_COMPLETE:String = "readComplete";
public function FileSerializerEvent(type:String, data:*=null, bubbles:Boolean = true, cancelable:Boolean = true)
{
super(type, bubbles, cancelable);
switch(type)
{
case WRITE_COMPLETE:
break;
case READ_COMPLETE:
break;
}
}
}
}
最后，我创建对象、实例化类并使用创建的对象调用类的 writeObjectToFile() 函数的代码:
private var ptotmImageVO:PTotmImageVO = new PTotmImageVO();
private var fileSerializer:FileSerializer = new FileSerializer();
protected function createThumbnail():void
{
thumbBmpData = ImageResizer.bilinearIterative(bmpData, borderRect.width, borderRect.height, ResizeMath.METHOD_LETTERBOX , true, 3);
saveImageToLibrary();
}
protected function saveImageToLibrary():void
{
statusMessage.text = "Saving Image and Thumbnail to Library...";
ptotmImageVO.userid = parentApplication.userid;
ptotmImageVO.description = "";
ptotmImageVO.timestamp = new Date().getTime();
// ptotmImageVO.thumbnail = thumbBmpData;
// ptotmImageVO.image = bmpData;
ptotmImageVO.type = "PictureTools - On The Move - Photo Entity";
fileSerializer.addEventListener(FileSerializerEvent.WRITE_COMPLETE, saveComplete);
fileSerializer.writeObjectToFile(ptotmImageVO, ptotmImageVO.userid+"-"+ptotmImageVO.timestamp+".PTotmImageVO");
}
protected function saveComplete(event:FileSerializerEvent):void
{
statusMessage.text = "File Saved to Library";
}
嗯，好吧。不妨提供所有信息。这是我试图在其中读取对象的类，因为我计划使用 itemRenderer 在 Tile 布局中显示它们(希望 Apache Flex 4.9 中的新 DataGrid 很快)...
<?xml version="1.0" encoding="utf-8"?>
<s:Group xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
creationComplete="drawBackground()"
click="refreshFileListing()">
<fx:Script>
<![CDATA[
import spark.components.VGroup;
import classes.FileSerializer;
import events.FileSerializerEvent;
import vo.PTotmImageVO;
[Bindable]
private var file:File = File.applicationStorageDirectory;
[Bindable]
private var directoryListing:String = new String();
private var files:Array;
private var fs:FileSerializer = new FileSerializer();
public function refreshFileListing():void
{
files = file.getDirectoryListing();
trace("MyLibraryPhotoPanel FUNCTION refreshFileListing -- file.nativePath -- "+file.nativePath);
trace("MyLibraryPhotoPanel FUNCTION refreshFileListing -- file.isDirectory -- "+file.isDirectory);
trace("MyLibraryPhotoPanel FUNCTION refreshFileListing -- file.name -- "+file.name);
trace("MyLibraryPhotoPanel FUNCTION refreshFileListing -- file.getDirectoryListing -- "+file.getDirectoryListing());
trace("MyLibraryPhotoPanel FUNCTION refreshFileListing -- files.length -- "+files.length);
var objects:Array = new Array();
for (var i:uint = 0; i < files.length; i++)
{
fs.addEventListener(FileSerializerEvent.READ_COMPLETE, fileReadComplete);
var f:String = files[i].name;
var o:PTotmImageVO = fs.readObjectFromFile(f) as PTotmImageVO;
objects.push(o); // Desperate at this point pretty much trying nonsense
trace("MyLibraryPhotoPanel FUNCTION refreshFileListing in for() -- o -- "+o);
// This is destined for an itemRenderer if ever I can get an object serialized to file and read back in.
// var b:BitmapData = o.thumbnail as BitmapData;
//
// var img:Image = new Image();
// img.source = b;
//
// var l:Label = new Label();
// l.text = files[i].name;
//
// var vg:VGroup = new VGroup();
// vg.addElement(img);
// vg.addElement(l);
//
// tg.addElement(vg);
trace("MyLibraryPhotoPanel FUNCTION refreshFileListing in for()#1 -- count/name/size -- "+i+". "+files[i].name+" "+files[i].size+"bytes");
}
for(var k:uint = 0; k<objects.length; k++)
{
trace("MyLibraryPhotoPanel FUNCTION refreshFileListing in for()#2 -- file object in Array -- "+k+". "+objects[k]);
}
} // End FUNCTION refreshFileListing
protected function fileReadComplete(event:FileSerializerEvent):void
{
trace("MyLibraryPhotoPanel FUNCTION FileReadComplete");
} // End FUNCTION fileReadComplete
protected function drawBackground():void
{
with(graphics)
{
beginFill(0xffffff,0);
drawRect(0,0,parent.width,parent.height);
endFill();
}
} // End FUNCTION drawBackground
]]>
</fx:Script>
<s:VGroup id="tg" height="100%" width="100%">
</s:VGroup>
</s:Group>
跟踪输出:
[SWF] PictureToolsOnTheMoveMakeIt.swf - 4,152,506 bytes after decompression
FileSerializer FUNCTION writeObjectToFile()
FileStream.openAsync(write) finally
FileStream.writeObject() finally
FileSerializer FUNCTION writeObjectToFile()
FileStream.openAsync(write) finally
FileStream.writeObject() finally
MyLibraryPhotoPanel FUNCTION refreshFileListing -- file.nativePath -- /var/mobile/Applications/926FFAF1-3FBE-4854-A61C-3BB8A3752D50/Library/Application Support/org.PictureTools.Apps.PictureToolsOnTheMoveMakeIt.debug/Local Store
MyLibraryPhotoPanel FUNCTION refreshFileListing -- file.isDirectory -- true
MyLibraryPhotoPanel FUNCTION refreshFileListing -- file.name -- Local Store
MyLibraryPhotoPanel FUNCTION refreshFileListing -- file.getDirectoryListing -- [object File],[object File]
MyLibraryPhotoPanel FUNCTION refreshFileListing -- files.length -- 2
MyLibraryPhotoPanel FUNCTION refreshFileListing in for() -- o -- null
MyLibraryPhotoPanel FUNCTION refreshFileListing in for()#1 -- count/name/size -- 0. 000000-1357831345565.PTotmImageVO 117bytes
MyLibraryPhotoPanel FUNCTION refreshFileListing in for() -- o -- null
MyLibraryPhotoPanel FUNCTION refreshFileListing in for()#1 -- count/name/size -- 1. 000000-1357831356829.PTotmImageVO 117bytes
MyLibraryPhotoPanel FUNCTION refreshFileListing in for()#2 -- file object in Array -- 0. null
MyLibraryPhotoPanel FUNCTION refreshFileListing in for()#2 -- file object in Array -- 1. null
最佳答案
已解决。元数据标记是 [RemoteClass... 而不是 [remoteClass]，如我开始工作的示例代码中所示。由于编译器不检查这些标签，并且从技术上讲，编写您自己的标签并不是错误，因此 - 永远 - 不会有任何可用于工作的诊断数据。
关于ios - Flex ActionScript3 FileStream.writeObject 在 iOS 中静默失败 - 我做错了什么？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/14259393/