Saving and loading images (png) on the iPhone / iPad locally

Question

Hi,
you might find this helpful..
Just tested how to save and load images, png in this case, locally on the i-Devices.
In addition with a SharedObject it could be used as an image cache.
Make sure you have the adobe.images.PNG encoder
https://github.com/mikechambers/as3corelib/blob/master/src/com/adobe/images/PNGEncoder.as
Not really tested, no error handling, just as a start.
Let me know, what you think...
Aaaaah and if somebody has any clue about this:
http://forums.adobe.com/thread/793584?tstart=0
would be great
Cheers Peter
    import flash.display.Bitmap
     import flash.display.BitmapData
    import flash.display.Loader   
    import flash.display.LoaderInfo
    import flash.events.*
    import flash.filesystem.File
    import flash.filesystem.FileMode
    import flash.filesystem.FileStream
    import flash.utils.ByteArray;
    import com.adobe.images.PNGEncoder;
private function savePic(){
    var bmp =  // Your Bitmap to save
    savePicToFile(bmp, "test.png")
private function loadPic(){
     readPicFromFile("test.png")
private function savePicToFile(bmp:Bitmap, fname:String){
       var ba:ByteArray = PNGEncoder.encode(bmp.bitmapData);
        var imagefile:File = File.applicationStorageDirectory;
        imagefile = imagefile.resolvePath(fname);
        var fileStream = new FileStream();
        fileStream.open(imagefile, FileMode.WRITE);
        fileStream.writeBytes(ba);
         trace("saved imagefile:"+imagefile.url)
private function readPicFromFile(fname:String){
        var imagefile:File = File.applicationStorageDirectory;
        imagefile = imagefile.resolvePath(fname);
        trace("read imagefile:"+imagefile.url)
        var ba:ByteArray = new ByteArray();
        var fileStream = new FileStream();
        fileStream.open(imagefile, FileMode.READ);
        fileStream.readBytes(ba);
        var loader:Loader = new Loader();
        loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onPicRead)
        loader.loadBytes(ba);   
private function onPicRead(e:Event){
    trace("onPicRead")
     var bmp:Bitmap = Bitmap(e.target.content)
     // Do something with it

Answer 1

Are the movies transferred to your iPhone via the iTunes sync/transfer process but don't play on your iPhone?
Copied from this link.
http://www.apple.com/iphone/specs.html
Video formats supported: H.264 video, up to 1.5 Mbps, 640 by 480 pixels, 30 frames per second, Low-Complexity version of the H.264 Baseline Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; H.264 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Baseline Profile up to Level 3.0 with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; MPEG-4 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats.
What are you using for the conversion? Does whatever you are using for the conversion include an iPod or iPhone compatible setting for the conversion?
iTunes includes a create iPod or iPhone version for a video in your iTunes library. Select the video and at the menu bar, go to Advanced and select Create iPod or iPhone version. This will duplicate the video in your iTunes library. Select this version for transfer to your iPhone to see if this makes any difference.