问题是图像不会被删除.

- (void)removeImage:(NSString*)fileName {

    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:
                      [NSString stringWithFormat:@"%@.png",fileName]];

    [fileManager removeItemAtPath: fullPath error:NULL];
    NSLog(@"image removed: %@",fullPath);

    NSString *appFolderPath = [[NSBundle mainBundle] resourcePath];    
    NSLog(@"Directory Contents:\n%@",[fileManager directoryContentsAtPath: appFolderPath]);
}

最后两行显示了我的app目录中的内容,我想要删除的图像仍然存在.我究竟做错了什么？