downloadedImageOnDevice

- (NSString)dowloadedImageOnDevice {
    NSString *fileOnDevice;
    NSString *imagePath;
    NSArray *dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentDirectoryPath = dirPaths[0];
    NSString *calendarDir = [documentDirectoryPath stringByAppendingString:[NSString stringWithFormat:@"/CalendarFolder/"]];
    NSArray *list = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:calendarDir error:nil];
    for (NSString* file in list) {
        if ([[file pathExtension] isEqualToString: @"png"]) {
            imagePath = [calendarDir stringByAppendingPathComponent:file];
        }
        fileOnDevice = [imagePath lastPathComponent];
        }
    return fileOnDevice;
}