Reading & Writing Images from iPhone's Documents Directory

Hello,

Many a times we face situations where we want to save some images or files in phones documents directory and then retrieve them when needed.

This option is usually chosen to avoid  fetching contents from web server
 instead saving & fetching contents locally on user's iPhone.

I have created two functions hope it helps somebody :)

-(void)saveImageInPhone:(NSData*)imageData withName:(NSString*)iconName

{

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, 

                     NSUserDomainMask, YES);  


    //Get the docs directory

    NSString *documentsPath = [paths objectAtIndex:0]; 

    NSString *folderPath = [documentsPath
                            stringByAppendingPathComponent:@"IconImages"];

    

   if (![[NSFileManager defaultManager] fileExistsAtPath:folderPath])

        [[NSFileManager defaultManager] createDirectoryAtPath:folderPath 

          withIntermediateDirectories:NO attributes:nil error:nil];

    

    //Add the FileName to FilePath

    NSString *filePath = [folderPath stringByAppendingPathComponent:[iconName 

                         stringByAppendingFormat:@"%@",@".png"]];

    //Write the file to documents directory

    [imageData writeToFile:filePath atomically:YES]; 

}

-(UIImage*)retrieveImageFromPhone:(NSString*)fileName 

                    havingVersion:(NSString*)iconVersionString 

{

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, 

                     NSUserDomainMask, YES);  

    

    //Get the docs directory

    NSString *documentsPath = [paths objectAtIndex:0]; 

    NSString *folderPath = [documentsPath
                           stringByAppendingPathComponent:@"IconImages"];

    NSString *filePath = [folderPath stringByAppendingPathComponent:

                          [fileName stringByAppendingFormat:
                            @"%@",@".png"]];

    if([[NSFileManager defaultManager] fileExistsAtPath:filePath])

        return [[UIImage alloc] initWithContentsOfFile:filePath];

    else 

        return nil;

}

How to view contents in Document Directory :


Finder  >> Library >> Application Support >> iPhone Simulator >> 
iOS version (5.1) >>  Applications >> Your Sample Application >> 
Documents >> IconImages >> myFirstImage.png.