UIImageWriteToSavedPhotosAlbum work so slow

[narut]

Hi,

I'm currently working on a custom camera app. My problem is when I try to save the capture
photo with UIImageWriteToSavedPhotosAlbum, it takes like 5-7 seconds to save each image.
(know this by add NSLog after call the function and after completionSelector get called)

And if I press Home button before the UIImageWriteToSavedPhotosAlbum function complete,
I lost that photo or sometime create weird result in Photos app.

So, here's my questions

1. What happen if I call UIImageWriteToSavedPhotosAlbum once and then call it again (to save another image) before the first image successfully saved?
2. How to prevent losing image if user press Home button before UIImageWriteToSavedPhotosAlbum is done?
3. How can some other app save image so fast? Using private API?

Thanks

[narut]

Anyone?

[jsd]

You can make it faster by scaling the image down after you get it from the camera.