可达性和国际漫游 [英] Reachability and International Roaming

问题描述

我使用来自Apple的 Reachability 类来确定数据或wifi是否可用。但是，用户（使用美国iPhone）正在另一个国家/地区测试该应用，并且在尝试访问MapKit时出现以下错误。

I am using the Reachability class from Apple to determine whether or not data or wifi is available. However, a user (with a U.S. iPhone) is testing the app in another country and he is seeing the following error while trying to access the MapKit.

在我对这个错误的研究中，我发现 PBRequester 是 ProtocolBuffer 。

In my research on this error, I have found that PBRequester is ProtocolBuffer.

2012-10-15 21：16：00.921 WrightsCS App [24239：907] PBRequester失败，错误错误域= kCFErrorDomainCFNetwork Code = -1018国际漫游目前关闭。 UserInfo = 0x1e5587d0 {NSErrorFailingURLKey = https：//gsp13-cn.ls.apple.com/shift，NSErrorFailingURLStringKey = https：//gsp13-cn.ls.apple.com/shift，NSLocalizedDescription =国际漫游目前已关闭。}

2012-10-15 21:16:00.921 WrightsCS App[24239:907] PBRequester failed with Error Error Domain=kCFErrorDomainCFNetwork Code=-1018 "International roaming is currently off." UserInfo=0x1e5587d0 {NSErrorFailingURLKey=https://gsp13-cn.ls.apple.com/shift, NSErrorFailingURLStringKey=https://gsp13-cn.ls.apple.com/shift, NSLocalizedDescription=International roaming is currently off.}

示例

Example

-(BOOL)hasDataConnection
{
    Reachability *networkReachability = [Reachability reachabilityForInternetConnection];
    NetworkStatus networkStatus = [networkReachability currentReachabilityStatus];

    if ( networkStatus == NotReachable )
    {
        return NO;
    }
    else
    {
        if ( ! [Reachability reachabilityWithHostName:@"www.google.com"] )
            return NO;

        return YES;
    }
}

问题

我们如何检测用户是否正在漫游，或者至少确保在用户漫游时不会遇到此错误？

Question

How can we detect if the user is roaming or at least ensure that we do not encounter this error if by chance the user is roaming?

推荐答案

确定 - 这不是一个答案，但可能指向正确的方向。首先，我找不到Objective C类似乎允许你这样做（例如 NSURLRequest Class）。

OK - this is not an answer but may point you in the right direction. To start with, I can't find an Objective C class that seems to let you do this (e.g. NSURLRequest Class).

我认为您需要直接前往CFNetwork Framework （CFNetwork Framework Reference），因为查看CFNetworkError代码有这些诱人的条目（它们匹配您的错误消息）：

I think you will need to go directly to the CFNetwork Framework (CFNetwork Framework Reference) because looking at the CFNetworkError codes has these tantalising entries (which match your error message):

kCFURLErrorNotConnectedToInternet  = -1009,
kCFURLErrorInternationalRoamingOff = -1018,
kCFURLErrorDataNotAllowed          = -1020,

不幸的是，我不知道CFNetwork框架，尽管看看苹果文档我不知道哪个CFNetwork框架API使用这些值。但我相信会有办法。

Unfortunately, I don't know the CFNetwork Framework and despite looking at the Apple docs I am no wiser about which CFNetwork Framework API's use these values. But I am convinced there will be a way.

我的两个想法（我很宽松地使用这个词）：

My two "ideas" (and I use that word loosely):

1. 使用 CFHost （并获取回调查询错误代码）


2. CFNetDiagnosticCopyNetworkStatusPassively （并解析返回的字符串）。

1. Use CFHost (and get a callback to query for the error code)
2. UseCFNetDiagnosticCopyNetworkStatusPassively (and parse the returned string).

如果有专家，真正的答案。

I would love to see the real answer if there's an expert out there.

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