我正在开发一个复杂的应用程序,我想在每个从服务器接收数据的 ViewController 上测试两个主机的互联网可达性我目前正在使用这个库来实现可达性
我想创建一个简单的方法或扩展来检查互联网和主机的可达性我已经使用了下面库中的示例代码:`import UIKit
import Reachability
class VC22: UIViewController {
@IBOutlet weak var networkStatus: UILabel!
@IBOutlet weak var hostNameLabel: UILabel!
var reachability: Reachability?
override func viewDidLoad() {
super.viewDidLoad()
// Start reachability without a hostname intially
setupReachability(nil, useClosures: true)
startNotifier()
// After 5 seconds, stop and re-start reachability, this time using a hostname
let dispatchTime = DispatchTime.now() + DispatchTimeInterval.seconds(5)
DispatchQueue.main.asyncAfter(deadline: dispatchTime) {
self.stopNotifier()
self.setupReachability("http://81.28.42.42:4242/", useClosures: true)
self.startNotifier()
let dispatchTime = DispatchTime.now() + DispatchTimeInterval.seconds(5)
DispatchQueue.main.asyncAfter(deadline: dispatchTime) {
self.stopNotifier()
self.setupReachability("invalidhost", useClosures: true)
self.startNotifier() }
}
}
func setupReachability(_ hostName: String?, useClosures: Bool) {
hostNameLabel.text = hostName != nil ? hostName : "No host name"
print("--- set up with host name: \(hostNameLabel.text!)")
let reachability = hostName == nil ? Reachability() : Reachability(hostname: hostName!)
self.reachability = reachability
if useClosures {
reachability?.whenReachable = { reachability in
DispatchQueue.main.async {
self.updateLabelColourWhenReachable(reachability)
}
}
reachability?.whenUnreachable = { reachability in
DispatchQueue.main.async {
self.updateLabelColourWhenNotReachable(reachability)
}
}
} else {
NotificationCenter.default.addObserver(self, selector: #selector(VC22.reachabilityChanged(_:)), name: ReachabilityChangedNotification, object: reachability)
}
}
func startNotifier() {
print("--- start notifier")
do {
try reachability?.startNotifier()
} catch {
networkStatus.textColor = .red
networkStatus.text = "Unable to start\nnotifier"
return
}
}
func stopNotifier() {
print("--- stop notifier")
reachability?.stopNotifier()
NotificationCenter.default.removeObserver(self, name: ReachabilityChangedNotification, object: nil)
reachability = nil
}
func updateLabelColourWhenReachable(_ reachability: Reachability) {
print("\(reachability.description) - \(reachability.currentReachabilityString)")
if reachability.isReachableViaWiFi {
self.networkStatus.textColor = .green
} else {
self.networkStatus.textColor = .blue
}
self.networkStatus.text = reachability.currentReachabilityString
}
func updateLabelColourWhenNotReachable(_ reachability: Reachability) {
print("\(reachability.description) - \(reachability.currentReachabilityString)")
self.networkStatus.textColor = .red
self.networkStatus.text = reachability.currentReachabilityString
}
func reachabilityChanged(_ note: Notification) {
let reachability = note.object as! Reachability
if reachability.isReachable {
updateLabelColourWhenReachable(reachability)
} else {
updateLabelColourWhenNotReachable(reachability)
}
}
deinit {
stopNotifier()
}
}
这很好,但我只需要一个布尔值来告诉我它是否已连接,可以通过应用程序重复使用
更新目前我正在使用以下课程:
import Foundation
import SystemConfiguration
public class Reachability {
class func isConnectedToNetwork() -> 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
}
let isReachable = flags == .reachable
let needsConnection = flags == .connectionRequired
return isReachable && !needsConnection
}
}
并在 viewControllers 中使用,如下所示:
if Reachability.isConnectedToNetwork() == true {
print("Internet connection OK")
JSONParseFunction()
} else {
print("Internet connection FAILED")
let alert = UIAlertView(title: "You are not connect to internet", message: "please check you connectivity", delegate: nil, cancelButtonTitle: "OK")
alert.show()
}
这样我只检查互联网我需要检查主机和互联网