ios - 如何从 os x 中的 webview 下载文件并将其保存到特定位置

Question

我到处都找遍了，但没有找到我要找的东西，所以这是我的问题:

我有一个正在玩的基本应用程序。我已经创建了一个 webview，并希望能够从加载到 webview 的网站下载一个文件，并将该文件保存到本地计算机上的 Downloads 文件夹中。该站点在 webview 中加载正常，现在我如何下载文件，比如从站点下载 .xml 文件并将其保存到本地计算机上的下载文件夹？

这是我目前所拥有的:

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{

    NSURL *url = [NSURL URLWithString:@"http://www.google.com"];//<-- example site
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    [[webView mainFrame] loadRequest:request];



}

我希望能够下载文件(可能使用委托(delegate))，然后将其保存到本地计算机上的某个位置。我对此很陌生，所以非常感谢任何帮助。

Answer 1

问题已经解决。我添加了以下代码以使其工作:

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    NSURL *url = [NSURL URLWithString:@"http://www.google.com"]; // <-- example website
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    self.webView.policyDelegate = self;
    [self.webView setDownloadDelegate:self];
    [[self.webView mainFrame] loadRequest:request];

}

- (void)webView:(WebView *)webView decidePolicyForMIMEType:(NSString *)type
                                                    request:(NSURLRequest *)request
                                                    frame:(WebFrame *)frame
                                            decisionListener:(id < WebPolicyDecisionListener >)listener
{
    if([type isEqualToString:@"application/octet-stream"]) //this is the type I was looking for
    {
        //figure out how to save file here

        [listener download];
        NSURLDownload *downLoad = [[NSURLDownload alloc] initWithRequest:request delegate:self];

        if(downLoad)
        {
            [self download:downLoad decideDestinationWithSuggestedFilename:@"filename.ext"];
            NSLog(@"File Downloaded Succesfully");
            //[webView close];
            [self.window close];

        }
        else
        {
            NSLog(@"The download failed");
        }



    }
    //just ignore all other types; the default behaviour will be used
}

-(void)download:(NSURLDownload *)download decideDestinationWithSuggestedFilename:(NSString *)filename
{
    NSString *destinationFileName;
    NSString *homeDirectory = NSHomeDirectory();

    destinationFileName = [[homeDirectory stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:filename];
    [download setDestination:destinationFileName allowOverwrite:NO]; //file is being saved to the Documents folder on the local machine
}

希望这对其他人有帮助。