objective-c - 从服务器下载 cocoa 包

Question

如何从服务器下载 Cocoa .bundle 文件，然后将其加载到应用程序中？我尝试过使用 zip，但是 shouldDecodeSourceDataOfMIMEType 函数没有被调用。

- (IBAction)testDownload:(id)sender {
    // Create the request.
    NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://localhost/SampleBundle.zip"]
                                                cachePolicy:NSURLRequestUseProtocolCachePolicy
                                            timeoutInterval:60.0];

    // Create the connection with the request and start loading the data.
    NSURLDownload  *theDownload = [[NSURLDownload alloc] initWithRequest:theRequest
                                                                delegate:self];
    if (theDownload) {
        // Set the destination file.
        [theDownload setDestination:@"/Users/developer/Desktop/Test-Downloads/SampleBundle" allowOverwrite:YES];
    } else {
        // inform the user that the download failed.
    }
}


- (void)download:(NSURLDownload *)download didFailWithError:(NSError *)error
{
    download = nil;

    // Inform the user.
    NSLog(@"Download failed! Error - %@ %@",
          [error localizedDescription],
          [[error userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]);
}

- (void)downloadDidFinish:(NSURLDownload *)download
{
    download = nil;

    // Do something with the data.
    NSLog(@"%@",@"downloadDidFinish");
}

- (BOOL)download:(NSURLDownload *)download shouldDecodeSourceDataOfMIMEType:(NSString *)encodingType;
{
    BOOL shouldDecode = YES;
    NSLog(@"EncodingType: %@",encodingType);
    return shouldDecode;
}

那么如何从服务器下载 .bundle 将其解压缩并将其加载到应用程序中？

谢谢

Answer 1

根据下载的文档:shouldDecodeSourceDataOfMIMEType:

This method is not called if the downloaded file is not encoded.

所以，我猜这可能与此有关。您最好实现 download:didReceiveResponse: 并检查 NSURLResponse 对象，尤其是状态代码 - 如果不是 200，则说明出现了问题，您需要查看 HTTP 代码以了解问题到底是什么。

另外，我不确定这一点，您是否需要提升权限来安装 bundle (它是可执行文件)？