使用Flex Mobile 4.6在iOS上载图书馆或捕获的图像
有没有人有使用iOS 4.6的Flex 4.6中的相机API的经验？ 我遇到了很多设置问题，缺less文档。 我正在尝试设置一个图片上传组件，用户可以在其中捕捉新照片或从其库中select一个现有的图片。
对于捕捉，当图像被保存为JPEG时，似乎有一个巨大的悬挂（像10秒，应用程序只是无响应），我正在使用Alchemy SWC。
private var cam:CameraUI; protected function takePhotoHandler(event:MouseEvent):void { if(CameraUI.isSupported) { cam = new CameraUI(); cam.addEventListener(MediaEvent.COMPLETE, mediaEventComplete); cam.launch(MediaType.IMAGE); } } protected function mediaEventComplete(e:MediaEvent):void { cam.removeEventListener(MediaEvent.COMPLETE, mediaEventComplete); status.text = "Media captured..." ; var imagePromise:MediaPromise = e.data; var loader:Loader = new Loader(); if(imagePromise.isAsync) { status.text = "Asynchronous media promise." ; loader.contentLoaderInfo.addEventListener(Event.COMPLETE, asyncImageLoadHandler); loader.addEventListener(IOErrorEvent.IO_ERROR, asyncImageErrorHandler); loader.loadFilePromise(imagePromise); } else { status.text = "Synchronous media promise."; loader.loadFilePromise(imagePromise); img.source = loader.content; saveImage(loader.contentLoaderInfo); } } protected function asyncImageLoadHandler(e:Event):void { status.text = "Media loaded in memory."; img.source = e.currentTarget.loader.content; saveImage(e.currentTarget.loader.contentLoaderInfo); } protected function saveImage(loaderInfo:LoaderInfo):void { if(CameraRoll.supportsAddBitmapData){ var bitmapData:BitmapData = new BitmapData(loaderInfo.width, loaderInfo.height); bitmapData.draw(loaderInfo.loader); d_trace("bitmapDraw"); //var c:CameraRoll = new CameraRoll(); //c.addBitmapData(bitmapData); d_trace("writing to disk"); var f:File = File.applicationStorageDirectory.resolvePath("temp"); var stream:FileStream = new FileStream() stream.open(f, FileMode.WRITE); d_trace("encoding start"); var baSource: ByteArray = bitmapData.clone().getPixels( new Rectangle( 0, 0, loaderInfo.width, loaderInfo.height) ); var bytes: ByteArray = as3_jpeg_wrapper.write_jpeg_file(baSource, loaderInfo.width, loaderInfo.height, 3, 2, 80); d_trace("encoding end"); stream.writeBytes(bytes,0,bytes.bytesAvailable); stream.close(); d_trace(f.url); img.source = f.url; d_trace("UPLOADING START"); f.addEventListener(Event.COMPLETE,uploadCompleteHandler); f.addEventListener(Event.OPEN,openUploadHandler); f.upload(urlRequest); } } 从库中select，我不能得到一个文件参考实际开始上传。 在进行select时，mediaPromise.file值为空。 mediaPromise.isAsync是真的，我可以附加一个加载器监听器，但只返回contentLoaderInfo，它没有参考实际的文件或FileRefernce，所以我不能调用上传方法没有创build一个临时图像，这看起来很昂贵，疯。
protected function chooseImage(): void { if(CameraRoll.supportsBrowseForImage) { var roll: CameraRoll = newCameraRoll(); roll.addEventListener( MediaEvent.SELECT, roll_selectHandler ); var options:CameraRollBrowseOptions = new CameraRollBrowseOptions(); roll.browseForImage(options); }} private function roll_selectHandler( event: MediaEvent ): void { var imagePromise:MediaPromise = event.data; if(imagePromise.isAsync) { // Here's where I get. Not sure how to get the reference to the file I just selected. }}
任何帮助，将不胜感激。
谢谢！
我觉得我find了一个解决scheme，因此我想分享它，以防止他人帮忙。 shaunhusain的post肯定让我朝着正确的方向前进。 我能够避免使用炼金术swc在一起，这在应用程序中节省了吨的时间。 关键是这个AS3库，我发现格式化URLRequest的方式，模仿一个标准的file uploadPOST操作。 基本概述如下：
我有一个名为“状态”的小组件，为用户叠加了一个图标和状态文本。 当用户想要添加一张照片时，他们会得到一个ViewMenu的select，从他们的图书馆获取照片或拍摄一张新照片。 代码的肉在下面。
//IMAGE HANDLING //Helpful Links: //http://www.quietless.com/kitchen/dynamically-create-an-image-in-flash-and-save-it-to-the-desktop-or-server/ //http://stackoverflow.com/questions/597947/how-can-i-send-a-bytearray-from-flash-and-some-form-data-to-php // GET WRAPPER CLASS Here: http://code.google.com/p/asfeedback/source/browse/trunk/com/marston/utils/URLRequestWrapper.as //This part is basically all based on http://www.adobe.com/devnet/air/articles/uploading-images-media-promise.html protected var cameraRoll:CameraRoll = new CameraRoll(); //User choose to pick a photo from their library protected function chooseImage():void { if( CameraRoll.supportsBrowseForImage ) { cameraRoll.addEventListener( MediaEvent.SELECT, imageSelected ); cameraRoll.addEventListener( Event.CANCEL, browseCanceled ); cameraRoll.addEventListener( ErrorEvent.ERROR, mediaError ); cameraRoll.browseForImage(); } else { trace( "Image browsing is not supported on this device."); } } //User choose to take a new photo! protected var cameraUI:CameraUI = new CameraUI(); protected function captureImage():void { if( CameraUI.isSupported ) { trace( "Initializing..." ); cameraUI.addEventListener( MediaEvent.COMPLETE, imageSelected ); cameraUI.addEventListener( Event.CANCEL, browseCanceled ); cameraUI.addEventListener( ErrorEvent.ERROR, mediaError ); cameraUI.launch( MediaType.IMAGE ); } else { trace( "CameraUI is not supported."); } } private function browseCanceled (e:Event):void { trace ("Camera Operation Cancelled"); } private function mediaError (e:ErrorEvent):void { trace ("mediaError"); } private var dataSource:IDataInput; private function imageSelected( event:MediaEvent ):void { trace( "Media selected..." ); var imagePromise:MediaPromise = event.data; dataSource = imagePromise.open(); if( imagePromise.isAsync ) { trace( "Asynchronous media promise." ); var eventSource:IEventDispatcher = dataSource as IEventDispatcher; eventSource.addEventListener( Event.COMPLETE, onMediaLoaded ); } else { trace( "Synchronous media promise." ); readMediaData(); } } private function onMediaLoaded( event:Event ):void { trace("Media load complete"); readMediaData(); } private function readMediaData():void { var imageBytes:ByteArray = new ByteArray(); dataSource.readBytes( imageBytes ); upload(imageBytes); } //OK Here's where it gets sent. Once the IDataInput has read the bytes of the image, we can send it via our custom URLRequestWrapper //which will format the request so the server interprets it was a normal file upload. Your params will get encoded as well //I used Uploadify this time but I've used this Wrapper class in other projects with success protected function upload( ba:ByteArray, fileName:String = null ):void { if( fileName == null ) //Make a name with correct file type { var now:Date = new Date(); fileName = "IMG" + now.fullYear + now.month +now.day + now.hours + now.minutes + now.seconds + ".jpg"; } var loader:URLLoader = new URLLoader(); loader.dataFormat= URLLoaderDataFormat.BINARY; var params:Object = {}; params.name = fileName; params.user_id = model.user.user_id; var wrapper:URLRequestWrapper = new URLRequestWrapper(ba, fileName, null, params); wrapper.url = "http://www.your-domain.com/uploadify.php"; loader.addEventListener( Event.COMPLETE, onUploadComplete ); loader.addEventListener(IOErrorEvent.IO_ERROR, onUploadError ); loader.load(wrapper.request); } private function onUploadComplete(e:Event):void { trace("UPLOAD COMPLETE"); var bytes:ByteArray = e.currentTarget.data as ByteArray; //Most likely you'd want a server response. It will be returned as a ByteArray, so you can get back to the string: trace("RESPONSE", bytes.toString()); } private function onUploadError(e:IOErrorEvent):void { trace("IOERROR", e.text); }