[iOS 14.5 Beta] SCNetworkReachabilityFlags return kSCNetworkReachabilityFlagsTransientConnection

The various kSCNetworkReachabilityFlagsXxx flags are meant to be flags, that is, you should test them in isolation. If you care about reachability, just test the kSCNetworkReachabilityFlagsReachable flag. The kSCNetworkReachabilityFlagsTransientConnection flag only matters if your care whether the connection is transient or not, which is pretty obscure.

Taking as step back, what are you using SCNetworkReachability for? [1]

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—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@apple.com"

[1] This is, in my experience, the #1 most misused API on our platforms. That is, most folks who are using it are either using it incorrectly or using it for the wrong reasons. Thus, any time I see folks ask about reachability I always ask the WAYRTTD question.

I was among the people who misused the SCNetworkReachability, my algirithm was:

• (NetworkStatus) networkStatusForFlags: (SCNetworkReachabilityFlags) flags

{
NetworkStatus status = NotReachable;

if (flags & kSCNetworkReachabilityFlagsReachable) {
if (flags & kSCNetworkReachabilityFlagsIsWWAN) {
status | = ReachableViaWWAN;
}
if (! (flags & kSCNetworkReachabilityFlagsTransientConnection)) {
status | = ReachableViaWiFi;
}
}
return status;
}
Who considers the status not reachable when I receive kSCNetworkReachabilityFlagsTransientConnection and I am reachable and not in WWAN.

Thanks for your help

So what are you trying to actually do here? I don’t see a network connection in play, so I’m presuming that this reachability instance isn’t associated with one. So what is it doing?

This matters because there are many ways to use reachability, almost all of which have better options. There’s too many options for me to enumerate them all here, but if you describe your circumstances I’m happy to suggest a better way forward.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@apple.com"

I wanted to know the status of the network from the received flags and be notified when this is changed.
The statuses are:
NotReachable
ReachableViaWWAN
ReachableViaWiFi