我有一个应用程序,可以在Xcode6-Beta1和Xcode6-Beta2与iOS7和iOS8上正常工作。但是对于Xcode6-Beta3, Beta4, Beta5,我在iOS8上面临网络问题,但在iOS7上一切都很好。我得到错误“网络连接丢失”。错误如下:

Error: ErrorDomain =NSURLErrorDomain Code=-1005 "The network connection was lost."UserInfo=0x7ba8e5b0 {NSErrorFailingURLStringKey=, _kCFStreamErrorCodeKey=57, NSErrorFailingURLKey=, NSLocalizedDescription=网络连接丢失。, _kCFStreamErrorDomainKey=1, NSUnderlyingError=0x7a6957e0 "The network connection was lost."}

我使用AFNetworking 2。X和下面的代码片段进行网络调用:

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager setSecurityPolicy:policy];
manager.requestSerializer = [AFHTTPRequestSerializer serializer];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];

[manager POST:<example-url>
   parameters:<parameteres>
      success:^(AFHTTPRequestOperation *operation, id responseObject) {
          NSLog(@“Success: %@", responseObject);
      } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
          NSLog(@"Error: %@", error);
      }];

我尝试了NSURLSession,但仍然收到相同的错误。


当前回答

On top of all the answers i found one nice solution. Actually The issue related to network connection fail for iOS 12 onword is because there is a bug in the iOS 12.0 onword. And it Yet to resolved. I had gone through the git hub community for AFNetworking related issue when app came from background and tries to do network call and fails on connection establish. I spend 3 days on this and tries many things to get to the root cause for this and found nothing. Finally i got some light in the dark when i red this blog https://github.com/AFNetworking/AFNetworking/issues/4279

据说iOS 12系统有漏洞。基本上,如果应用程序不在前台,你就不能期望网络调用完成。由于这个错误,网络呼叫被中断,我们在日志中得到网络故障。

我给你的最好的建议是,当你的应用从后台到前台有网络呼叫时,提供一些延迟。使调度中的网络调用具有一定的延迟。你永远不会得到网络呼叫掉线或连接丢失。

不要等待苹果在iOS 12中解决这个问题,因为它仍然没有修复。 你可以通过为你的网络请求NSURLConnection, NSURLSession或AFNetworking或ALAMOFIRE提供一些延迟来解决这个问题。欢呼:)

其他回答

我必须退出XCode,删除DerivedData文件夹内容(~/Library/Developer/ XCode /DerivedData或/Library/Developer/ XCode /DerivedData)并退出模拟器才能使其工作。

重新启动模拟器解决了我的问题。

2017年1月25日,苹果发布了一份关于此错误的技术问答:

Apple Technical Q&A QA1941 Handling “The network connection was lost” Errors A: NSURLErrorNetworkConnectionLost is error -1005 in the NSURLErrorDomain error domain, and is displayed to users as “The network connection was lost”. This error means that the underlying TCP connection that’s carrying the HTTP request disconnected while the HTTP request was in progress (see below for more information about this). In some circumstances NSURLSession may retry such requests automatically (specifically, if the request is idempotent) but in other circumstances that’s not allowed by the HTTP standards. https://developer.apple.com/library/archive/qa/qa1941/_index.html#//apple_ref/doc/uid/DTS40017602

我遇到这个问题的原因如下。

TLDR:检查您发送的GET请求是否应该发送url上的参数,而不是NSURLRequest的HTTBody属性。

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我在我的应用程序上安装了一个网络抽象,它对我的所有请求都运行得很好。

我向另一个web服务(不是我自己的)添加了一个新请求,它开始向我抛出这个错误。

我去了一个操场,从最基本的要求开始,它成功了。所以我开始接近我的抽象概念,直到我找到原因。

我的抽象实现有一个错误: 我发送了一个请求,应该发送url编码的参数,我也填充了NSURLRequest的HTTBody属性与查询参数。 只要我移除HTTPBody,它就工作了。

无论何时得到错误-1005,然后需要再次调用API。

AFHTTPRequestOperationManager *manager = 
[AFHTTPRequestOperationManager manager];
[manager setSecurityPolicy:policy];
manager.requestSerializer = [AFHTTPRequestSerializer serializer];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];

[manager POST:<example-url>
   parameters:<parameteres>
    success:^(AFHTTPRequestOperation *operation, id responseObject) {
      NSLog(@“Success: %@", responseObject);
  } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
      NSLog(@"Error: %@", error);
      if (error.code == -1005) {
          // Call method again... 
       }
  }];

您需要再次添加调用函数的代码。确保你是调用方法一次,否则它的调用循环递归。