本文档提供了一个Swift实现的网络状态结构体`NetworkStatus`，包含获取当前WiFi信息、判断网络可达性以及识别网络类型的功能。通过`CTTelephonyNetworkInfo`和`CNCopyCurrentNetworkInfo`等系统API，能详细判断是WiFi、2G、3G、4G还是无网络连接。
//
// NetworkStatus.swift
//
// Created by A on 15/10/26.
// Copyright © 2015年 A. All rights reserved.
//
import Foundation
import CoreTelephony.CTTelephonyNetworkInfo
import SystemConfiguration.CaptiveNetwork
//import NetworkExtension.NEHotspotHelper
enum NetworkReachable {
case CanReachable
case NotReachable
}
enum NetworkType {
case WiFi
case Unknown
case Cellular2G
case Cellular3G
case Cellular4G
}
struct NetworkStatus {
func getCurrentWifiInfo() -> (String, String) {
if let interfaces = CNCopySupportedInterfaces() {
let if0: UnsafePointer<Void>? = CFArrayGetValueAtIndex(interfaces, 0)
let interfaceName: CFStringRef = unsafeBitCast(if0!, CFStringRef.self)
let ssidNSDic = CNCopyCurrentNetworkInfo(interfaceName) as NSDictionary?
var ssid = String()
var bssid = String()
if ssidNSDic != nil { // 未连接WiFi的情况会返回nil
ssid = ssidNSDic!["SSID"] as! String
bssid = ssidNSDic!["BSSID"] as! String
return (bssid, ssid)
} else {
return ("", "")
}
}
return ("", "")
}
/*
* 在调用该接口之前一定要用isNetworkReachable()来确保有网络连接
*/
func currentNetworkType() -> NetworkType {
let networkType = CTTelephonyNetworkInfo().currentRadioAccessTechnology
if networkType == nil { // 非蜂窝网络下会返回nil
// 排除是WiFi还是无网络
if isNetworkReachable() == .CanReachable { // 这下可以判断是Wifi了
return .WiFi
} else {
assert(false, "要是仅仅判断有无网络的话就用isNetworkReachable()，该接口是判断网络类型的，你应该在确保有网络的情况下调用该接口")
return .Unknown
}
} else {
switch networkType! {
case CTRadioAccessTechnologyGPRS:
return .Cellular2G
case CTRadioAccessTechnologyEdge:
return .Cellular2G // 2.75G的EDGE网络
case CTRadioAccessTechnologyWCDMA:
return .Cellular3G
case CTRadioAccessTechnologyHSDPA:
return .Cellular3G // 3.5G网络
case CTRadioAccessTechnologyHSUPA:
return .Cellular3G // 3.5G网络
case CTRadioAccessTechnologyCDMA1x:
return .Cellular2G // CDMA2G网络
case CTRadioAccessTechnologyCDMAEVDORev0,
CTRadioAccessTechnologyCDMAEVDORevA,
CTRadioAccessTechnologyCDMAEVDORevB:
return .Cellular3G
case CTRadioAccessTechnologyeHRPD:
return .Cellular3G // 电信的怪胎，只能算3G
case CTRadioAccessTechnologyLTE:
return .Cellular4G
default:
return .Unknown
}
}
}
func isNetworkReachable() -> NetworkReachable {
var isCellularReachable = false // wifi 是否连接了
let networkType = CTTelephonyNetworkInfo().currentRadioAccessTechnology
if networkType == nil { // 非蜂窝网络下会返回nil
isCellularReachable = false
} else {
isCellularReachable = true
}
/*
* there are total three condition
* 1.not reachable, 2.cellular, 3.wifi
*/
var isWifiReachable = false // wifi 是否连接了
if let interfaces = CNCopySupportedInterfaces() {
let if0: UnsafePointer<Void>? = CFArrayGetValueAtIndex(interfaces, 0)
let interfaceName: CFStringRef = unsafeBitCast(if0!, CFStringRef.self)
let ssidNSDic = CNCopyCurrentNetworkInfo(interfaceName) as NSDictionary?
if ssidNSDic == nil {
isWifiReachable = false
} else {
isWifiReachable = true
}
}
if isCellularReachable == false && isWifiReachable == false { // 非蜂窝网络下会返回nil && 未连接WiFi的情况会返回nil
return .NotReachable
} else {
return .CanReachable
}
}
var reachable: NetworkReachable {
get {
return isNetworkReachable()
}
}
var networkType: NetworkType {
get {
return currentNetworkType()
}
}
}
扫一扫
3176
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
