I've been pouring over stack overflow for ages trying to find a way out of this error:
unexpected non void return value in void function
that I am getting with returning a Bool within my function.
i just can't seem to dig my way out of this one. I'm sure its something to do with async but I'm not very familiar with these types of functions.
class CheckReachability {
class func setupReachability (hostName:String?, useClosures: Bool) -> Bool{
var reachability : Reachability!
var connected = false
let reachability2 = hostName == nil ? Reachability() : Reachability(hostname: hostName!)
reachability = reachability2
try! reachability?.startNotifier()
if useClosures {
reachability2?.whenReachable = { reachability in
DispatchQueue.main.async {
connected = true
print("Reachable....")
}
}
reachability2?.whenUnreachable = { reachability in
DispatchQueue.main.async {
connected = false
print("Not Connected....")
}
}
} else {
NotificationCenter.default.addObserver(self, selector: Selector(("reachabilityChanged:")), name: ReachabilityChangedNotification, object: reachability2)
}
return connected
}
}
calling this from viewdidload on another vc doesn't allow enough time to get a true result
let connected = CheckReachability.setupReachability(hostName: nil, useClosures: true)
if connected {
If you want to write a checking class to listen to the reachability, define it as a singleton and pass the completeBlock to it like this:
class CheckReachability {
static let shared = CheckReachability()
var reachability: Reachability?
func setupReachability(hostName:String?, completeBlock: ((Bool) -> Void)? = nil) {
reachability = hostName == nil ? Reachability() : Reachability(hostname: hostName!)
try? reachability?.startNotifier()
if let block = completeBlock {
reachability?.whenReachable = { reachability in
DispatchQueue.main.async {
print("Reachable....")
block(true)
}
}
reachability?.whenUnreachable = { reachability in
DispatchQueue.main.async {
print("Not Connected....")
block(false)
}
}
} else {
// If we don't use block, there is no point to observe it.
NotificationCenter.default.addObserver(self, selector: #selector(reachabilityChanged(_:)), name: .ReachabilityChangedNotification, object: nil)
}
}
deinit {
NotificationCenter.default.removeObserver(self)
}
@objc func reachabilityChanged(_ notification: Notification) {
// ?? what should we do here?
}
}
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