upload photo from my iphone gallery - ios

Question

I am working on an application that needs its user to upload a photo for him, using iphone, how can i implement this : when click on the image in my personal information page, the gallery is opend to choose a photo. when the photo is chosen it must appear instead of the previous one (at first it is the default pic). Notice that, the path of this photo or the photo itself(i do not know) must be stored in the DataBase for the next login. Moreover, this photo must be transferred to the server in order to be shown on the website when the same user login on the web.
I did it using the following code, i can choose a photo but when i save the path i could not load the pic again. it is a white box !! there is no photo !!
-(void) pickPhoto
{
UIImagePickerController *picker ;
picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])
{
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
}
else
{
picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
}
[self presentViewController:picker animated:YES completion:nil];
}
-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *img = [info objectForKey:UIImagePickerControllerEditedImage];
if(!img)
img = [info objectForKey:UIImagePickerControllerOriginalImage];
NSString *docDirPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *filePath = [docDirPath stringByAppendingPathComponent:#"myImage.png"];
NSLog (#"File Path = %#", filePath);
UIButton *btn = (UIButton *)[self.tableView viewWithTag:2013];
[btn setBackgroundImage:img forState:UIControlStateNormal];
database= [[connectToDB alloc] init];
[database setDelegate:self];
[database saveUserPic:filePath ForUser:user.userId];
[self dismissViewControllerAnimated:YES completion:nil];
}
now to load the pic :
UIImage *img;
if(pic != nil)
img=[UIImage imageWithContentsOfFile:pic];
else
img= [UIImage imageNamed:#"business_userL.png"];
Any Help will be appreciated.!

Answer 1

UIImagePickerControllerReferenceURL will return reference to local storage of your selected image.
NSURL* localUrl = (NSURL *)[info valueForKey:UIImagePickerControllerReferenceURL];
Now you can save this url in your database.
To retrieve the image : display image from URL retrieved from ALAsset in iPhone