iphone 保存到沙盒中的图片的读取

1：原文摘自：http://www.devdiv.com/thread-84543-1-1.html

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
        UIImage *baseImage = [info objectForKey:UIImagePickerControllerOriginalImage];
        if (baseImage == nil) return;
        compositeImage = [self addOverlayToBaseImage:baseImage];
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
        NSDate* date = [NSDate date];
        NSDateFormatter* formatter = [[[NSDateFormatter alloc] init] autorelease];
        [formatter setDateFormat:@"yyyyMMddHHMMSS"];
        NSString* str = [formatter stringFromDate:date]; 
        //给照片按拍摄时间命名
        NSString *uniquePath=[[paths objectAtIndex:0] stringByAppendingPathComponent:[NSString stringWithFormat:@"%@",str]];
    BOOL result=[UIImagePNGRepresentation(compositeImage)writeToFile: uniquePath atomically:YES];
    if (result) {
        NSLog(@"success");
    }        
}

请问如何把这些保存在沙盒中的图片全部读出来呢？并循环显示在一个uiimageview中呢？