Saving and loading UIImage in an iPhone app - iphone

Question

I am having a headache working out what's wrong with my app. I am trying to save and load UIImages, simple right? Seems not so.
I have a class with these methods to save, load and delete an image with a unique string. Just how I like it, nice and simple. Here is the class:
imageSavedLoad.h:
#import <Foundation/Foundation.h>
#interface imageSaveLoad : NSObject
- (void)saveImage:(UIImage*)image forKey:(NSString*)imageName;
- (void)removeImage:(NSString*)fileName;
- (UIImage*)loadImage:(NSString*)imageName;
#end
imageSaveLoad.m:
#import "imageSaveLoad.h"
#implementation imageSaveLoad
//saving an image
- (void)saveImage:(UIImage*)image forKey:(NSString*)imageName
{
NSData *imageData = UIImagePNGRepresentation(image);
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:#"%#.png", imageName]];
[fileManager createFileAtPath:fullPath contents:imageData attributes:nil];
NSLog(#"image saved");
}
//removing an image
- (void)removeImage:(NSString*)fileName
{
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:#"%#.png", fileName]];
[fileManager removeItemAtPath: fullPath error:NULL];
NSLog(#"image removed");
}
//loading an image
- (UIImage*)loadImage:(NSString*)imageName
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:#"%#.png", imageName]];
return [UIImage imageWithContentsOfFile:fullPath];
}
#end
Where I want to save, load or delete an image I import the class: #import "imageSaveLoad.h"
Then I create an instance of it and call the required methods (here I save):
imageSaveLoad *imgSL = [[imageSaveLoad alloc] init];
[imgSL saveImage:photoImgView.image forKey:#"yourPhoto"];
Then in another view/class where I want to retrieve the image:
imageSaveLoad *imgSL = [[imageSaveLoad alloc] init];
yourImgView.image = [imgSL loadImage:#"yourPhoto"];
But yourImgView displays nothing, blank.
So where am I going wrong? I have checked all IBOutlet connections and that all the code is being called. Is there a problem with the methods I am using?

Answer 1

When saving image, try by replacing this line :
[fileManager createFileAtPath:fullPath contents:imageData attributes:nil];
With
[imageData writeToFile:fullpath atomically:YES];