How to load .png images from Documents folder of an app - ios

Question

I have .png images in the Documents folder of my app but when i try to load them it don't work :/
I have this class for the methods for saving and loading :
UIImage+loadScan.h :
#import <UIKit/UIKit.h>
#interface UIImage (loadScan)
- (void)saveScan:(NSString*)name;
- (UIImage *)loadScan:(NSString*)name;
#end
.m :
#import "UIImage+loadScan.h"
#implementation UIImage (loadScan)
#pragma SAVE AND LOAD
- (void)saveScan:(NSString*)name{
if (self != nil)
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString* path = [documentsDirectory stringByAppendingPathComponent:
[NSString stringWithString:name] ];
NSData* data = UIImagePNGRepresentation(self);
[data writeToFile:path atomically:YES];
}
}
- (UIImage *)loadScan:(NSString*)name{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString* path = [NSString stringWithFormat:#"%#/%#", documentsDirectory, name];
NSLog(#"loading %#", path);
NSData *imgData = [NSData dataWithContentsOfFile:path];
UIImage *image = [[UIImage alloc] initWithData:imgData];
//UIImage *image = [UIImage imageWithContentsOfFile:path];
return image;
}
#end
The method saveScan work good :
[image saveScan:[NSString stringWithFormat:#"%#.png", imgName]];
But loadScan don't want to work :
UIImage *imageLoad = [[UIImage alloc] init];
[imageLoad loadScan:[NSString stringWithFormat:#"%#.png", imgName]];
cell.imageScan.image = imageLoad;
I don't understand why, yet the file exist.
Thanks

Answer 1

I have found a (strange) method, but it work (i send the UIImage also un parametter and init it in the method) :
- (UIImage *)loadScan:(NSString*)name theImage:(UIImage*)theImg{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString* path = [NSString stringWithFormat:#"%#/%#", documentsDirectory, name];
NSLog(#"loading %#", path);
[theImg initWithContentsOfFile:path];
return theImg;
}
Call with :
UIImage *imageLoad = [UIImage alloc];
[imageLoad loadScan:[NSString stringWithFormat:#"%##2x.png", imgName] theImage:imageLoad];
Now imageLoad have the image data and we can show it !