Save Imagedata in the imageview - ios

Question

In the app i made an image view that holds the Image chosen from the library of the phone or taken by the camera. But when I go back to the previous scene the image chosen is gone. I want it to be saved in the image view and have a clear button to remove it. The camera function works but the image doesn't stay in the image view.
The camera function:
.h file
#interface FMEImageView : UIViewController <UINavigationControllerDelegate, UIImagePickerControllerDelegate> {
IBOutlet UIImageView *ImageView;
UIImagePickerController *picker;
UIImage *image;
}
- (IBAction)Takephoto:(id)sender;
- (IBAction)Chosenphoto:(id)sender;
#end
.m file
- (IBAction)Takephoto:(id)sender{
picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
[picker setSourceType:UIImagePickerControllerSourceTypeCamera];
[self presentViewController:picker animated:YES completion:NULL];
}
- (IBAction)Chosenphoto:(id)sender{
picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
[picker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
[self presentViewController:picker animated:YES completion:NULL];
}
- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
image = [info objectForKey:#"UIImagePickerControllerOriginalImage"];
[ImageView setImage:image];
[self dismissViewControllerAnimated:YES completion:NULL];
}
- (void) imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[self dismissViewControllerAnimated:YES completion:NULL];
}

Answer 1

I think, you will have to save images to the documents directory of your application.
Get image data.
NSData *imgData = UIImagePNGRepresentation(image);
Write it to documents directory.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
NSString *filePath = [documentsPath stringByAppendingPathComponent:#"image.png"];//Choose name for the image.
[imgData writeToFile:filePath atomically:YES]; //Write the file
Get the data and display it on the imageView.
Again, get filePath.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
NSString *filePath = [documentsPath stringByAppendingPathComponent:#"image.png"];//Name you have given
NSData *imgData = [NSData dataWithContentsOfFile:filePath];
UIImage *image = [UIImage imageWithData:imgData];
imageView.image = image;
It is better to make a function to get the path of documents directory.
I hope it helps.

Answer 2

You might be using new instance every time. use same instance once initialized.