Saving image persistently in within App - iOS - iphone

Question

Trying to select image using photo picker and save that image internally in apps folder.
- (void) imagePickerController: (UIImagePickerController *) pickerdidFinishPickingMediaWithInfo: (NSDictionary *) info {
NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType];
UIImage *originalImage, *editedImage, *imageToUse;
// Handle a still image picked from a photo album
if (CFStringCompare ((CFStringRef) mediaType, kUTTypeImage, 0)
== kCFCompareEqualTo) {
editedImage = (UIImage *) [info objectForKey:
UIImagePickerControllerEditedImage];
originalImage = (UIImage *) [info objectForKey:
UIImagePickerControllerOriginalImage];
if (editedImage) {
imageToUse = editedImage;
} else {
imageToUse = originalImage;
}
// Do something with imageToUse
//save it
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *imageName = [documentsDirectory stringByAppendingString:[NSString stringWithFormat:#"%d", myUniqueID]];
NSString *imagePath = [imageName stringByAppendingPathComponent:#".png"];
NSData *webData = UIImagePNGRepresentation(editedImage);
NSError* error = nil;
bool success = [webData writeToFile:imagePath options:NULL error:&error];
if (success) {
// successfull save
imageCount++;
[[NSUserDefaults standardUserDefaults] setInteger:imageCount forKey:#"imageCount"];
NSLog(#"#Success save to: %#", imagePath);
}
else if (error) {
NSLog(#"Error:%#", error.localizedDescription);
}
}
...
}
What I can't figure out is that writeToFile::: returns false but no value is returned in error so I can't figure out whats going wrong. Any help would be greatly appreciated thanks

Answer 1

You're missing a "/". The line:
NSString *imageName = [documentsDirectory stringByAppendingString:[NSString stringWithFormat:#"%d", myUniqueID]];
should be:
NSString *imageName = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:#"%d", myUniqueID]];
And the line that says:
NSString *imagePath = [imageName stringByAppendingPathComponent:#".png"];
should be:
NSString *imagePath = [imageName stringByAppendingPathExtension:#"png"];
Update:
And, shouldn't:
NSData *webData = UIImagePNGRepresentation(editedImage);
be the following?
NSData *webData = UIImagePNGRepresentation(imageToUse);