从php网站解码附件url

因此，我有一个内置php（IP板）的网站，我的ios应用程序中有一个下载管理器，可以检测zip、deb等文件扩展名。但是我找不到方法让它识别板用于附加文件的url

我现在使用的代码：

//Download manager
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {

    if(navigationType == UIWebViewNavigationTypeLinkClicked) {
        NSURL *theRessourcesURL = [request URL];
        NSString *fileExtension = [theRessourcesURL pathExtension];

        NSLog(@"fileExtension is: %@", fileExtension);
        if ([fileExtension hasSuffix:@"zip"] || [fileExtension hasSuffix:@"deb"] || [fileExtension hasSuffix:@"rar"] || [fileExtension hasSuffix:@"mp3"] || [fileExtension hasSuffix:@"pdf"] || [fileExtension hasSuffix:@"exe"] || [fileExtension hasSuffix:@"mp4"] || [fileExtension hasSuffix:@"flv"] || [fileExtension hasSuffix:@"torrent"] || [fileExtension hasSuffix:@"png"] || [fileExtension hasSuffix:@"jpg"] || [fileExtension hasSuffix:@"jpeg"]) {

            NSError *error = nil; //error setting
            NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
            NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder
            NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:@"downloads"];

            if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath])
                [[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error]; //Create folder

            HCDownloadViewController *dlvc = [[HCDownloadViewController alloc] init];
            [dlvc downloadURL:theRessourcesURL userInfo:nil];


            [self.navigationController setNavigationBarHidden:NO];
            self.navigationController.navigationBar.tintColor = [UIColor colorWithRed:0/255.0f green:0/255.0f blue:0/255.0f alpha:1];
            [self.navigationController pushViewController:dlvc animated:YES];

            dlvc.delegate = self;
            return NO;
        }
        else {
        }
    }
    return YES;
}

目前，该网站上载的附件提供如下链接：

实现这一目标的最佳方式是什么

谢谢你的帮助

更新7/17：

从我试图收集的信息来看，我试图使用下面的内容。但我似乎无法将其链接到下载管理器以启动下载视图控制器

//New method I'm trying
    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

    NSString *userId= [prefs stringForKey:@"userIdkey"];

    NSString *urlStr = [NSString stringWithFormat:@"http://mysite.com/index.php?app=core&module=attach&section=attach&attach_id=%@",userId];

//Need to push this view controller like the file extension code above
    HCDownloadViewController *dlvc = [[HCDownloadViewController alloc] init];
    [dlvc downloadURL:theRessourcesURL userInfo:nil];

更新7/18：

在这里尝试其他操作，但仍然没有推送视图控制器

NSURL *url = [request URL];
NSString *id = @"12212323";
NSString *fullURL = [[url pathExtension] initWithFormat:@"www.mysite.com/index.php?app=core&module=attach&section=attach&attach_id=%@", id];

抛出此日志：

*WebKit丢弃了webView:DecisionPolicyFornavigationAction:request:frame:decisionListener: 委托：初始化方法 -initWithFormat:locale:arguments:无法发送到类NSPathStore2:创建具体实例的抽象对象

---

通过调整服务器端的一些东西解决了这个问题，然后使用这个找到了扩展

NSString *fileExtension = [[externalURL absoluteString] pathExtension];

不知道为什么在代码完全相同的情况下将其标记为“已编辑”

  //My code
    NSString *fileExtension = [[externalURL absoluteString] pathExtension];