状态Wifi/5G/4G/3G/2G"/>

Swift获取当前网络状态Wifi/5G/4G/3G/2G

通过Swift获取当前网络状态

通过第三方库Alamofire获取网络状态只能获取到ethernetOrWiFi、cellular、notReachable、unknown这几种网络状态，不能准确的获取到Wifi/5G/4G/3G/2G状态，于是通过系统SystemConfiguration跟CoreTelephony库来实现获取当前对应的网络状态，实现代码如下：

import CoreTelephony
import SystemConfiguration/// 无网络返回字样
private static var notReachable: String {get {return "notReachable"}}/// 获取网络类型
private static func getNetworkType() -> String {var zeroAddress = sockaddr_storage()bzero(&zeroAddress, MemoryLayout<sockaddr_storage>.size)zeroAddress.ss_len = __uint8_t(MemoryLayout<sockaddr_storage>.size)zeroAddress.ss_family = sa_family_t(AF_INET)let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {$0.withMemoryRebound(to: sockaddr.self, capacity: 1) { address inSCNetworkReachabilityCreateWithAddress(nil, address)}}guard let defaultRouteReachability = defaultRouteReachability else {return notReachable}var flags = SCNetworkReachabilityFlags()let didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags)guard didRetrieveFlags == true,(flags.contains(.reachable) && !flags.contains(.connectionRequired)) == trueelse {return notReachable}if flags.contains(.connectionRequired) {return notReachable} else if flags.contains(.isWWAN) {return self.cellularType()} else {return "WiFi"}}/// 获取蜂窝数据类型private static func cellularType() -> String {let info = CTTelephonyNetworkInfo()var status: Stringif #available(iOS 12.0, *) {guard let dict = info.serviceCurrentRadioAccessTechnology,let firstKey = dict.keys.first,let statusTemp = dict[firstKey] else {return notReachable}status = statusTemp} else {guard let statusTemp = info.currentRadioAccessTechnology else {return notReachable}status = statusTemp}if #available(iOS 14.1, *) {if status == CTRadioAccessTechnologyNR || status == CTRadioAccessTechnologyNRNSA {return "5G"}}switch status {case CTRadioAccessTechnologyGPRS,CTRadioAccessTechnologyEdge,CTRadioAccessTechnologyCDMA1x:return "2G"case CTRadioAccessTechnologyWCDMA,CTRadioAccessTechnologyHSDPA,CTRadioAccessTechnologyHSUPA,CTRadioAccessTechnologyeHRPD,CTRadioAccessTechnologyCDMAEVDORev0,CTRadioAccessTechnologyCDMAEVDORevA,CTRadioAccessTechnologyCDMAEVDORevB:return "3G"case CTRadioAccessTechnologyLTE:return "4G"default:return notReachable}}