Saving picture from app - ios

Question

I am trying to make my application open the camera app to take a save pictures.
from my application i am launching the camera application to take a picture with the following code:
-(IBAction)TakePhoto:(id)sender {
picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
[picker setSourceType:UIImagePickerControllerSourceTypeCamera];
[self presentViewController:picker animated:YES completion:NULL];
[picker release];
//save image??:
//UIImageWriteToSavedPhotosAlbum(UIImage *image, id completionTarget, SEL completionSelector, void *contextInfo);
}
-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
image = [info objectForKey:UIImagePickerControllerOriginalImage];
[self dismissViewControllerAnimated:YES completion:NULL];
}
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[self dismissViewControllerAnimated:YES completion:NULL];
}
My problem is that once the button is pressed, the camera comes out and allows me to take a picture. Once the picture is take, the image is shown and i have the option to "retake" or "use". My issue is that if i click "use" the image is not saved to the camera roll. Is there a possibility to save the image and eventually change the "use" button to say "save"?
Thank you for you help!

Answer 1

The photo isn't being saved because you never actually added the code to save the image to the didFinishPickingMediaWithInfo: delegate method. All you have to do is add the line that you commented out in TakePhoto: to this function and you will be able to save the photo to the camera roll. E.x:
-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
image = [info objectForKey:UIImagePickerControllerOriginalImage];
UIImageWriteToSavedPhotosAlbum(image, nil, nil, NULL);
[self dismissViewControllerAnimated:YES completion:NULL];
}

Answer 2

static NSDateFormatter* dateFormatter;
- (NSString*) generateNameWithExtension: (NSString*) extension
{
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = #"yyyyMMddHHmmssSSS";
});
NSDate* now = [NSDate date];
NSString* string = [dateFormatter stringFromDate:now];
string = [NSString stringWithFormat:#"%#.%#",string,extension];
return string;
}
- (NSString*) saveImage: (UIImage*) image WithExtension: (NSString*) extension
{
extension = [extension lowercaseString];
NSData* data;
if ([extension isEqualToString:#"png"])
{
data = UIImagePNGRepresentation(image);
}else if ([extension isEqualToString:#"jpg"]||[extension isEqualToString:#"jpeg"])
{
data = UIImageJPEGRepresentation(image, 1.0);
}else{
NSLog(#"Error save local image, Extension: (%#) is not recognized, use (PNG/JPG)",extension);
return nil;
}
NSString* imageName = [self generateNameWithExtension:extension];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documents = [paths objectAtIndex:0];
NSString *finalPath = [documents stringByAppendingPathComponent:imageName];
[data writeToFile:finalPath options:NSAtomicWrite error:nil];
return finalPath;
}
This code save image in folder you app. You can later use it: [UIImage imageWithContentsOfFile:finalPath]