Swift 3 check internet connection with Reachability - ios

Question

so I'm looking at using this GitHub api to that checks for the reachability of a host.: https://github.com/ashleymills/Reachability.swift/tree/feature/ios10
however its pretty bare bones and I'm getting a few errors when trying to write a function that will use this code. I'm calling it from viewdidload
setupReachability(hostName: nil)
var reachability:Reachability?
var connected = false
func setupReachability (hostName:String?) {
do {
let reachability = try hostName == nil ? Reachability() : Reachability(hostname: hostName!)
self.reachability = reachability
try! self.reachability?.startNotifier()
} catch ReachabilityError.FailedToCreateWithAddress(let address) {
print(address)
return
} catch {}
//now that the reacability function is created set a notification
NotificationCenter.default.addObserver(self, selector: "reachabilityChanged", name: ReachabilityChangedNotification, object: reachability)
}
func reachabilityChanged(notification: Notification) {
let reachability = notification.object as! Reachability
if reachability.isReachable {
if reachability.isReachableViaWiFi {
connected = true
print("Connected via WiFi")
} else {
connected = true
print("Connected via Cellular")
}
} else {
connected = false
print("Not Connected")
}
}
this is my error log:
2016-12-28 08:53:25.441 ParseStarterProject-Swift[92944:1919466] Simulator user has requested new graphics quality: 100
2016-12-28 08:53:29.697 ParseStarterProject-Swift[92944:1919546] -[ParseStarterProject_Swift.PackViewController reachabilityChanged]: unrecognized selector sent to instance 0x7fafabd0bb40
2016-12-28 08:53:29.712 ParseStarterProject-Swift[92944:1919546] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[ParseStarterProject_Swift.PackViewController reachabilityChanged]: unrecognized selector sent to instance 0x7fafabd0bb40'
*** First throw call stack:
(
0 CoreFoundation 0x000000010ad98d4b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x000000010a7fa21e objc_exception_throw + 48
2 CoreFoundation 0x000000010ae08f04 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
3 CoreFoundation 0x000000010ad1e005 ___forwarding___ + 1013
4 CoreFoundation 0x000000010ad1db88 _CF_forwarding_prep_0 + 120
5 CoreFoundation 0x000000010ad365ec __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
6 CoreFoundation 0x000000010ad364eb _CFXRegistrationPost + 427
7 CoreFoundation 0x000000010ad36252 ___CFXNotificationPost_block_invoke + 50
8 CoreFoundation 0x000000010acf9282 -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 2018
9 CoreFoundation 0x000000010acf831b _CFXNotificationPost + 667
10 Foundation 0x000000010a2c081b -[NSNotificationCenter postNotificationName:object:userInfo:] + 66
11 ParseStarterProject-Swift 0x000000010983fabe _TFC25ParseStarterProject_Swift12ReachabilityP33_3EC4A4DB94B171724E68742C2AA9888E19reachabilityChangedfT_T_ + 462
12 ParseStarterProject-Swift 0x0000000109841205 _TFFC25ParseStarterProject_Swift12Reachability13startNotifierFzT_T_U_FT_T_ + 21
13 ParseStarterProject-Swift 0x0000000109811f17 _TTRXFo___XFdCb___ + 39
14 libdispatch.dylib 0x000000010df1b978 _dispatch_call_block_and_release + 12
15 libdispatch.dylib 0x000000010df450cd _dispatch_client_callout + 8
16 libdispatch.dylib 0x000000010df22e17 _dispatch_queue_serial_drain + 236
17 libdispatch.dylib 0x000000010df23b4b _dispatch_queue_invoke + 1073
18 libdispatch.dylib 0x000000010df2402b _dispatch_queue_override_invoke + 683
19 libdispatch.dylib 0x000000010df26385 _dispatch_root_queue_drain + 720
20 libdispatch.dylib 0x000000010df26059 _dispatch_worker_thread3 + 123
21 libsystem_pthread.dylib 0x000000010e39f712 _pthread_wqthread + 1299
22 libsystem_pthread.dylib 0x000000010e39f1ed start_wqthread + 13
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
EDIT

Answer 1

You forgot a colon on the reachabilityChanged: selector. You need it to indicate that an argument is to be passed:
NotificationCenter.default.addObserver(self, selector: "reachabilityChanged:", name: ReachabilityChangedNotification, object: reachability)