Resizing an image from UIImagePickerController not working - ios

Question

I am following this post on how to resize an image. I placed the + (UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize; in selectExerciseImageViewController.h and copied the relevant code to selectExerciseImageViewController.m.
Then I attempt to resize the image, save it, and retrieve the saved image file into a UIImageView. but for some reason the image is never showing the the UIImageView and the last NSLog returns null
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
[picker dismissModalViewControllerAnimated:YES];
UIImage* newImage = [selectExerciseImageViewController imageWithImage:[info objectForKey:#"UIImagePickerControllerOriginalImage"]
scaledToSizeWithSameAspectRatio:CGSizeMake(40.0,40.0)];
NSData* imageData = UIImagePNGRepresentation(newImage);
// Give a name to the file
NSString* imageName = #"MyImage.png";
// Now, we have to find the documents directory so we can save it
// Note that you might want to save it elsewhere, like the cache directory,
// or something similar.
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString* documentsDirectory = [paths objectAtIndex:0];
// Now we get the full path to the file
NSString* fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName];
// and then we write it out
[imageData writeToFile:fullPathToFile atomically:NO];
//imageView.image = [info objectForKey:#"UIImagePickerControllerOriginalImage"];
_testimg.image = [UIImage imageNamed:#"MyImage.png"];
NSLog(#"asd %#",[UIImage imageNamed:#"MyImage.png"]);
}

Answer 1

[UIImage imageNamed:#"MyImage.png"];
This loads an image from the main application bundle. You are writing the file to the documents directory. You need to instantiate the UIImage object with a different method. Try:
[UIImage imageWithContentsOfFile:fullPathToFile];