IOS How to save and get iamge from url

/* save image from url */
+ (void) saveImageFromURL:(NSString *) folder file:(NSString *)fileName url:(NSString*)fileURL {   
    NSString *filePath;
    [self removeFileFromDocuments:folder file:fileName];
    NSString* documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    if([folder length] == 0) {
        filePath = [documentsDirectory stringByAppendingPathComponent:fileName];
    } else {
        filePath = [[[[documentsDirectory stringByAppendingString:@"/"] stringByAppendingString:folder] stringByAppendingString:@"/"] stringByAppendingString:fileName]; 
    }
    NSFileManager *fileManager = [NSFileManager defaultManager];
   
    if(![fileManager fileExistsAtPath:filePath]) {       
        // Get an image from the URL below
        UIImage *image = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:fileURL]]];
        NSData *data = [NSData dataWithData:UIImagePNGRepresentation(image)];
        [data writeToFile:filePath atomically:YES];
        [image release];
    }
   
}

/* get image from url */
+ (UIImage*) getImageFromURL:(NSString*)fileURL {   
    // Get an image from the URL below
    UIImage *image = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:fileURL]]];
    return [image autorelease];
}

+ (UIImage*) getSynchronousImage:(NSString*)fileURL {
    NSError * err;
    NSURLResponse * response;
    @autoreleasepool {
   
        NSString *strURL = [fileURL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

        NSURLRequest *imageRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:strURL]];

        NSData * receivedData = [NSURLConnection sendSynchronousRequest:imageRequest
                                                      returningResponse:&response
                                                                  error:&err];
        if( !receivedData ){
            /* Handle error */
            UtiLog(@"Error:%@",[err description]);
        }
       
        UIImage *image = [[UIImage alloc] initWithData:receivedData];
                              
        return image;
  }
}