On 11 Jul 2012, at 7:18 AM, Vavelin Kevin wrote:
> As you can see, i'm french :) This code works perfectly, I can access to my
> PhotoLibrary and save the picture in my app but here's the problem :
> - (void) imagePickerController:(UIImagePickerController *)picker
> didFinishPickingMediaWithInfo:(NSDictionary *)info
> {
>
> UIImage *image = [info
> objectForKey:@"UIImagePickerControllerOriginalImage"];
>
> UIImageWriteToSavedPhotosAlbum(image, self,
> @selector(image:didFinishSavingWithError:contextInfo:), nil);
>
> }
Have you verified that image is not nil? Framework string constants are not
guaranteed (very often do not) to have the same content as their names. The
value of the global NSString constant UIImagePickerControllerOriginalImage may
not be @"UIImagePickerControllerOriginalImage".
> The method didFinishPickingMediaWithInfo is no longer call in my app and i
> don't know why. I see that code on stackoverflow and the doc on Xcode doesn't
> seems to be helpful.
By "no longer" called, I assume you mean that it had been called, but the calls
stopped coming. Possibly passing nil to UIImageWriteToSavedPhotosAlbum()
(because the objectForKey: returned nil from an unused key) broke the framework
in some way that stopped the callbacks.
I don't know (I honestly don't know) whether the callback from
UIImageWriteToSavedPhotosAlbum() is called on the main thread. The
documentation says only that the callback will arrive "asynchronously." Add
assert([NSThread isMainThread]);
to the beginning of the callback method. If the assertion triggers, then your
use of UIAlertView will damage your app (it ought to crash, but sometimes one
is not so lucky).
I don't know if these are the cause of your problem. I look forward to
someone's pointing out some API error that I missed in my reading of your code.
— F
--
Fritz Anderson -- Xcode 4 Unleashed: Now in stores! --
<http://x4u.manoverboard.org/>
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