对于iOS 9,我使用Reachability公共类来检查设备是否连接到互联网。我将Swift 2代码转换为Swift 3,而Reachability不再适用。有人能告诉我如何检查iOS 10上的互联网连接吗?谢谢! 这是代码段:
open class Reachability {
class func isConnectedToNetwork() -> Bool {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {
SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))
}
var flags = SCNetworkReachabilityFlags()
if !SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) {
return false
}
let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
return (isReachable && !needsConnection)
}
}
答案 0 :(得分:107)
import Foundation
import SystemConfiguration
func isInternetAvailable() -> Bool
{
var zeroAddress = sockaddr_in()
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()
if !SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) {
return false
}
let isReachable = flags.contains(.reachable)
let needsConnection = flags.contains(.connectionRequired)
return (isReachable && !needsConnection)
}
这适用于iOS 10
答案 1 :(得分:62)
SWIFT 3.0 : 这是非常简单的方法:
import SystemConfiguration
protocol Utilities {
}
extension NSObject:Utilities{
enum ReachabilityStatus {
case notReachable
case reachableViaWWAN
case reachableViaWiFi
}
var currentReachabilityStatus: ReachabilityStatus {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
zeroAddress.sin_family = sa_family_t(AF_INET)
guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
SCNetworkReachabilityCreateWithAddress(nil, $0)
}
}) else {
return .notReachable
}
var flags: SCNetworkReachabilityFlags = []
if !SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) {
return .notReachable
}
if flags.contains(.reachable) == false {
// The target host is not reachable.
return .notReachable
}
else if flags.contains(.isWWAN) == true {
// WWAN connections are OK if the calling application is using the CFNetwork APIs.
return .reachableViaWWAN
}
else if flags.contains(.connectionRequired) == false {
// If the target host is reachable and no connection is required then we'll assume that you're on Wi-Fi...
return .reachableViaWiFi
}
else if (flags.contains(.connectionOnDemand) == true || flags.contains(.connectionOnTraffic) == true) && flags.contains(.interventionRequired) == false {
// The connection is on-demand (or on-traffic) if the calling application is using the CFSocketStream or higher APIs and no [user] intervention is needed
return .reachableViaWiFi
}
else {
return .notReachable
}
}
}
然后只需在项目的任何位置使用它,例如:
func viewDidLoad(){
print(currentReachabilityStatus != .notReachable) //true connected
}
答案 2 :(得分:11)
试试这个,它对我有用 首先导入 SystemConfiguration 到您的班级。
import SystemConfiguration
现在实现波纹管功能。
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()
if !SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) {
return false
}
let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
return (isReachable && !needsConnection)
}
答案 3 :(得分:7)
第1步:在项目中创建一个swift文件。我创建了“ConnectionCheck.swift”
第2步:将此代码添加到“ConnectionCheck.swift”文件中,并将“import SystemConfiguration”文件添加到“ConnectionCheck.swift”和“ViewController.swift”
import Foundation
import SystemConfiguration
public class ConnectionCheck {
class func isConnectedToNetwork() -> Bool {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
zeroAddress.sin_family = sa_family_t(AF_INET)
guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
SCNetworkReachabilityCreateWithAddress(nil, $0)
}
}) else {
return false
}
var flags: SCNetworkReachabilityFlags = []
if !SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) {
return false
}
let isReachable = flags.contains(.reachable)
let needsConnection = flags.contains(.connectionRequired)
return (isReachable && !needsConnection)
}
}
步骤3:现在在“ViewController.swift”中使用此代码检查网络可达性
if ConnectionCheck.isConnectedToNetwork() {
print("Connected")
}
else{
print("disConnected")
}
答案 4 :(得分:3)
这是通过回调函数的Swift 3解决方案,isConnectedToNetwork()
取自Yasin Ugurlu从上面的解决方案。
class func isInternetAvailable(webSiteToPing: String?, completionHandler: @escaping (Bool) -> Void) {
// 1. Check the WiFi Connection
guard isConnectedToNetwork() else {
completionHandler(false)
return
}
// 2. Check the Internet Connection
var webAddress = "https://www.google.com" // Default Web Site
if let _ = webSiteToPing {
webAddress = webSiteToPing!
}
guard let url = URL(string: webAddress) else {
completionHandler(false)
print("could not create url from: \(webAddress)")
return
}
let urlRequest = URLRequest(url: url)
let session = URLSession.shared
let task = session.dataTask(with: urlRequest, completionHandler: { (data, response, error) in
if error != nil || response == nil {
completionHandler(false)
} else {
completionHandler(true)
}
})
task.resume()
}
答案 5 :(得分:3)
此代码对您有所帮助。它在Swift 4和Xcode 9中对我有用
转到https://github.com/ashleymills/Reachability.swift/tree/master/Reachability 并将Reachability.swift文件复制到您的项目
Vasil Nunev清楚地解释了这种可达性 https://www.youtube.com/watch?v=wDZmz9IsB-8
class ViewController: UIViewController {
let reachability = Reachability();
override func viewDidLoad() {
super.viewDidLoad()
reachability?.whenReachable = { _ in
DispatchQueue.main.async {
self.view.backgroundColor = UIColor.green
}
}
reachability?.whenUnreachable = { _ in
DispatchQueue.main.async {
self.view.backgroundColor = UIColor.red
}
}
NotificationCenter.default.addObserver(self, selector: #selector(internetChanged), name: Notification.Name.reachabilityChanged , object: reachability)
do{
try reachability?.startNotifier()
}catch{
print("Could not start notifier:\(error)")
}
}
@objc func internetChanged(note:Notification) {
let reachability = note.object as! Reachability
if reachability.connection != .none {
if reachability.connection == .wifi{
DispatchQueue.main.async {
self.view.backgroundColor = #colorLiteral(red: 0.3411764801, green: 0.6235294342, blue: 0.1686274558, alpha: 1)
}
}else if reachability.connection == .cellular{
DispatchQueue.main.async {
self.view.backgroundColor = #colorLiteral(red: 0.3647058904, green: 0.06666667014, blue: 0.9686274529, alpha: 1)
}
}
}else{
DispatchQueue.main.async {
self.view.backgroundColor = #colorLiteral(red: 0.7450980544, green: 0.1568627506, blue: 0.07450980693, alpha: 1)
}
}
}
}
答案 6 :(得分:1)
Swift 4 / Xcode 10:
我将结合两个函数(稍作修改)从@Pavle Mijatovic和@Krutagn Patel的解决方案中获取(谢谢)回答@Lance Samaria问题。 :)
我几乎检查了所有可能性。 (代码可以增强,但效果很好)
有一个课程如下:
import Foundation
import SystemConfiguration
public class ConnectionCheck {
class func isConnectedToNetwork() -> Bool {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
zeroAddress.sin_family = sa_family_t(AF_INET)
guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
SCNetworkReachabilityCreateWithAddress(nil, $0)
}
}) else {
return false
}
var flags: SCNetworkReachabilityFlags = []
if !SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) {
return false
}
let isReachable = flags.contains(.reachable)
let needsConnection = flags.contains(.connectionRequired)
return (isReachable && !needsConnection)
}
class func isInternetAvailable(webSiteToPing: String?, completionHandler: @escaping (_ b: Bool) -> Void) {
// 1. Check the WiFi Connection
guard isConnectedToNetwork() else {
completionHandler(false)
return
}
// 2. Check the Internet Connection
var webAddress = "https://www.google.com" // Default Web Site
if let _ = webSiteToPing {
webAddress = webSiteToPing!
}
guard let url = URL(string: webAddress) else {
completionHandler(false)
print("could not create url from: \(webAddress)")
return
}
let urlRequest = URLRequest(url: url)
let session = URLSession.shared
let task = session.dataTask(with: urlRequest, completionHandler: { (data, response, error) in
if error != nil || response == nil {
completionHandler(false)
} else {
completionHandler(true)
}
})
task.resume()
}
}
使用以下代码检查互联网连接:例如,在 appDelegate - &gt;中applicationDidBecomeActive 功能。
说明:每当调用completionHandler函数(上面)时,结果(true或false)将作为b
传递给下面的代码。所以,如果b为真,你就有了互联网连接。
let web : String? = "https://www.google.com"
ConnectionCheck.isInternetAvailable(webSiteToPing: web) { (b) in
print(b)
if b {
print("connected") // or do something here
} else {
print("disconnected") // or do something here
}
}
答案 7 :(得分:0)
你可以在swift 3中使用
@Html.Raw(File.ReadAllText(Server.MapPath("~/image.svg")))
答案 8 :(得分:0)
1)在您的项目中创建一个新的Swift文件,将其命名为“ Reachability.swift”。
2)将以下代码剪切并粘贴到其中以创建您的类。
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(sizeofValue(zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(&zeroAddress) {
SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, UnsafePointer($0))
}
var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
return false
}
let isReachable = flags == .Reachable
let needsConnection = flags == .ConnectionRequired
return isReachable && !needsConnection
}
}
3)您可以使用以下代码检查项目中任何地方的互联网连接:
if Reachability.isConnectedToNetwork() == true {
println("Internet connection OK")
} else {
println("Internet connection FAILED")
}
4)如果用户未连接到Internet,则可能要向他们显示一个警报对话框以通知他们。
if Reachability.isConnectedToNetwork() == true {
println("Internet connection OK")
} else {
println("Internet connection FAILED")
var alert = UIAlertView(title: "No Internet Connection", message: "Make sure your
device is connected to the internet.", delegate: nil, cancelButtonTitle: "OK")
alert.show()
}
答案 9 :(得分:0)
Swift 4 / Xcode 9+(制作Reachability.swift文件):
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
}
// 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
}
}
用法:
if Reachability.isConnectedToNetwork() {
// connected, do something
}
答案 10 :(得分:0)
在您的项目中创建一个Swift文件,将其命名为:Reachability.swift”。 然后将以下代码粘贴到该Reachability.swift文件中:-
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(sizeofValue(zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(&zeroAddress) {
SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, UnsafePointer($0))
}
var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
return false
}
let isReachable = flags == .Reachable
let needsConnection = flags == .ConnectionRequired
return isReachable && !needsConnection
}
}
然后,您可以使用以下代码检查项目中任何地方的互联网
if Reachability.isConnectedToNetwork() == true {
println("Internet connection OK")
} else {
println("Internet connection FAILED")
}
答案 11 :(得分:0)
Swift 4.0的另一种解决方案。不是IUU的忠实粉丝,而是使用警卫队
func isConnectedToNetwork() -> Bool {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
SCNetworkReachabilityCreateWithAddress(nil, $0)
}
}) else {
return false
}
var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
if SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) == false {
return false
}
let isReachable = flags == .reachable
let needsConnection = flags == .connectionRequired
return isReachable && !needsConnection
}