我想检查设备是否已连接到互联网。为此,我等到得到结果(对或错)。这是我的代码:
import Foundation
import Network
let monitor = NWPathMonitor()
let queue = DispatchQueue(label: "Monitor")
var connected = false
func checkConnection(completion:@escaping (Bool) -> () ) {
DispatchQueue.main.async {
monitor.pathUpdateHandler = { path in
if path.status == .satisfied {
connected = true
} else {
connected = false
}
}
monitor.start(queue: queue)
completion(true)
}
}
checkConnection { (status) in
if status {
print(connected)
}
}
我不明白为什么它不起作用。我预计connected
的值会有所变化,具体取决于我是否已连接到Internet。取而代之的是,connected
的值保持等于false
。
有人有想法吗?谢谢
[我发现了另一种方法,更简单了:此类验证互联网连接(WiFi或蜂窝电话):
import SystemConfiguration
public class CheckInternet{
class func Connection() -> Bool{
var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {zeroSockAddress in
SCNetworkReachabilityCreateWithAddress(nil, zeroSockAddress)
}
}
var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
return false
}
// Working for Cellular and WIFI
let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
let ret = (isReachable && !needsConnection)
return ret
}
}
然后,在您的代码中检查(并等待)连接:
func checkConnection(completion:@escaping (Bool) -> () ) {
DispatchQueue.main.async {
if CheckInternet.Connection(){
print("Internet connection is on.")
self.go = true
} else {
self.go = false
print("There's no internet connection.")
}
completion(true)
}
}
checkConnection { (status) in
if status {
if self.go {
// your code
} else {
// your code
}
}
}