プロジェクトで単純な writeObject/readObject 機能を取得するためだけに、数日間試みてきました。私が何をしても、結果は、a) ファイルが作成され、b) そのファイルを読み込もうとするとnullになります。
私のプロジェクトは iPad デバイス上の iOS を対象としていますが、この機能を取り除いたバージョンは iPad 用の AIR シミュレーターを対象としています。
以前に、利用可能なすべてのイベントを登録して追跡しましたが、何も達成できなかったので、問題を単純にするためにそれらを削除しました。
値オブジェクトの代わりに単一の文字列プロパティが設定された汎用オブジェクトを使用しても、 nullとして読み戻されます (そして、書き出されると思います) 。
プロジェクトで使用されるコードが続く私のトレースリターンは次のとおりです。
[SWF] PictureToolsOnTheMoveMakeItDev.swf - 2,644,533 bytes after decompression
PictureToolsOnTheMoveMakeItDev FUNCTION creationCompleteHandler
file.resolvePath(filename).nativePath: C:\Users\cepelc\AppData\Roaming\org.PictureTools.Apps.PictureToolsOnTheMoveMakeItDev.debug\Local Store\User00100\Photos\00100-1358359285139.PTotmImageVO
PictureToolsOnTheMoveMakeItDev FUNCTION saveImageToLibrary
FileSerializer FUNCTION writeObjectToFile()
FileStream.open(write) TRY
FileStream.open(write) FINALLY
FileStream.writeObject(ptotmImageVO) TRY
FileStream.writeObject(ptotmImageVO) FINALLY
FileStream.close()
PictureToolsOnTheMoveMakeItDev FUNCTION readImageFromLibrary
FileSerializer FUNCTION readObjectFromFile(C:\Users\cepelc\AppData\Roaming\org.PictureTools.Apps.PictureToolsOnTheMoveMakeItDev.debug\Local Store\User00100\Photos\00100-1358359285139.PTotmImageVO)
file.exists: true
FileStream.open(read) TRY
FileStream.open(read) FINALLY
FileStream.readObject() TRY
FileStream.readObject() FINALLY
FileStream.close()
FileSerializer FUNCTION readObjectFromFile -- ptotmImageVO -- null
ptotmImageVO: null
[Unload SWF] PictureToolsOnTheMoveMakeItDev.swf
以下は私のアプリケーションMXMLです：
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark" applicationDPI="240"
xmlns:c="components.*"
creationComplete="creationCompleteHandler()">
<s:layout>
<s:VerticalLayout verticalAlign="middle" horizontalAlign="center" />
</s:layout>
<fx:Script>
<![CDATA[
import classes.FileSerializer;
import vo.PTotmImageVO;
private var ptotmImageVO:PTotmImageVO;
private var fileSerializer:FileSerializer = new FileSerializer();
private var file:File = File.applicationStorageDirectory;
private var filename:String;
protected function creationCompleteHandler():void
{
trace("PictureToolsOnTheMoveMakeItDev FUNCTION creationCompleteHandler");
ptotmImageVO = new PTotmImageVO();
ptotmImageVO.userid = "00100";
ptotmImageVO.description = "TestPuppyBunnyThingy";
ptotmImageVO.timestamp = new Date().getTime();
ptotmImageVO.type = "PictureTools - On The Move - Photo Entity";
filename = ptotmImageVO.userid+"-"+ptotmImageVO.timestamp+".PTotmImageVO";
file = file.resolvePath("User00100");
if(file.exists && !file.isDirectory)
{
file.deleteFile();
}
file.createDirectory();
file = file.resolvePath("Photos");
if(file.exists && !file.isDirectory)
{
file.deleteFile();
}
file.createDirectory();
trace(" file.resolvePath(filename).nativePath: "+file.resolvePath(filename).nativePath);
saveImageToLibrary();
} // end FUNCTION creationCompleteHandler
protected function saveImageToLibrary():void
{
trace("PictureToolsOnTheMoveMakeItDev FUNCTION saveImageToLibrary");
fileSerializer.writeObjectToFile(ptotmImageVO, file.resolvePath(filename).nativePath);
readImageFromLibrary();
} // end FUNCTION saveImageToLibrary
protected function readImageFromLibrary():void
{
trace("PictureToolsOnTheMoveMakeItDev FUNCTION readImageFromLibrary");
ptotmImageVO = fileSerializer.readObjectFromFile(file.resolvePath(filename).nativePath) as PTotmImageVO;
trace(" ptotmImageVO: "+ptotmImageVO);
} // End FUNCTION readImageFromLibrary
]]>
</fx:Script>
</s:Application>
FileSerializer.as クラス
package classes
{
import flash.errors.IOError;
import flash.filesystem.File;
import flash.filesystem.FileMode;
import flash.filesystem.FileStream;
import vo.PTotmImageVO;
public class FileSerializer
{
private var fileStream:FileStream = new FileStream();
private var file:File;
public function FileSerializer()
{
} // End CONSTRUCTOR FileSerializer
public function writeObjectToFile(ptotmImageVO:PTotmImageVO, fname:String):void
{
trace("FileSerializer FUNCTION writeObjectToFile()");
file = new File(fname);
try
{
trace(" FileStream.open(write) TRY");
fileStream.open(file, FileMode.WRITE);
}
catch (e:SecurityError)
{
trace(" FileStream.open(write) CATCH SecurityError "+e);
}
finally
{
trace(" FileStream.open(write) FINALLY");
}
try
{
trace(" FileStream.writeObject(ptotmImageVO) TRY");
fileStream.writeObject(ptotmImageVO);
}
catch (e:IOError)
{
trace(" FileStream.writeObject(ptotmImageVO) CATCH IOError "+e);
}
finally
{
trace(" FileStream.writeObject(ptotmImageVO) FINALLY");
}
fileStream.close();
trace(" FileStream.close()");
} // End FUNCTION writeObjectToFile
public function readObjectFromFile(fname:String):PTotmImageVO
{
trace("FileSerializer FUNCTION readObjectFromFile("+fname+")");
var ptotmImageVO:PTotmImageVO;
file = file.resolvePath(fname);
trace(" file.exists: "+file.exists);
if(file.exists)
{
try
{
fileStream.open(file, FileMode.READ);
trace(" FileStream.open(read) TRY");
}
catch (e:SecurityError)
{
trace(" FileStream.open(read) CATCH SecurityError "+e);
}
finally
{
trace(" FileStream.open(read) FINALLY");
}
try
{
trace(" FileStream.readObject() TRY");
ptotmImageVO = fileStream.readObject() as PTotmImageVO;
}
catch (e:IOError)
{
trace(" FileStream.readObject() CATCH IOError "+e);
}
finally
{
trace(" FileStream.readObject() FINALLY");
}
fileStream.close();
trace(" FileStream.close()");
trace(" FileSerializer FUNCTION readObjectFromFile -- ptotmImageVO -- "+ptotmImageVO);
return ptotmImageVO;
}
else
{
return null;
}
} // End FUNCTION readObjectFromFile
} // End CLASS FileSerializer
} // End PACKAGE classes
PTotmImageVO.as 値オブジェクト
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