ios - 错误域=NSURLErrorDomain 代码=-1009 "The Internet connection appears to be offline."

Question

当我尝试连接到 soundcloud 时使用以下代码:

// Create the request.
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"https://soundcloud.com/api"] cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:10.0];

// Create url connection and fire request
NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];

当我遇到以下错误时:

Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline." UserInfo={NSUnderlyingError=0x14cfccae0 {Error Domain=kCFErrorDomainCFNetwork Code=-1009 "The Internet connection appears to be offline." UserInfo={NSErrorFailingURLStringKey=https://soundcloud.com/api, NSErrorFailingURLKey=https://soundcloud.com/api, kCFStreamErrorCodeKey=50, kCFStreamErrorDomainKey=1, NSLocalizedDescription=The Internet connection appears to be offline.}}, NSErrorFailingURLStringKey=https://soundcloud.com/api, NSErrorFailingURLKey=https://soundcloud.com/api, kCFStreamErrorDomainKey=1, kCFStreamErrorCodeKey=50, NSLocalizedDescription=The Internet connection appears to be offline.}

关键是:我在我的iPhone上运行它，网络是4G。当我通过 Wifi 使用其他网络时，代码实际上运行良好。

Answer 1

原因是我的 iPhone 上的应用程序关闭了 4G 网络，但不确定我何时以及为何这样做。