iOS平台网络类型检测

#import <Foundation/Foundation.h>
/*
 依赖于以下Framework
 SystemConfiguration
 CoreTelephony
 */
typedef enum _NetWorkType
{
    kNetworkOff = 0,
    kNetworkWifi,
    kNetworkWLan,//如果不能获取到更详细的,将统一返回该值(iOS7以上才能获取到)
    kNetworkWLan2G,
    kNetworkWLan3G,
    kNetworkGPRS,
    kNetworkEdge,
    kNetworkWCDMA,
    kNetworkHSDPA,
    kNetworkHSUPA,
    kNetworkCDMA1x,
    kNetworkCDMAEVDORev0,
    kNetworkCDMAEVDORevA,
    kNetworkCDMAEVDORevB,
    kNetworkHRPD,
    kNetworkLTE,
}NetworkType;
@interface HSNetworkDetect : NSObject

//通用接口
/*
 返回0~2的网络类型枚举值NetworkType
 */
+(NetworkType)getNetworkType;
/*
 iOS7及以上,确定是蜂窝网络的情况下,返回>2的网络类型枚举值;否则,仍返回2
 */
+(NetworkType)getCellularDataNetworkType;
/*
 检测网络是否可达,使用Reachability
 */
+(BOOL)isReachable:(NSString*)address port:(NSInteger)port;
/*
 获取当前连接的WIFI热点的SSID
 */
+(NSString*)getWifiSSID;


@end

#import "HSNetworkDetect.h"
#import "Reachability.h"
#import <CoreTelephony/CTTelephonyNetworkInfo.h>
#import <SystemConfiguration/CaptiveNetwork.h>

#define ISIOS7 !([[[UIDevice currentDevice] systemVersion] floatValue] <=6.9f)
#define SENTENCED_EMPTY(string)    (string = ((string == nil) ? @"":string))

@implementation HSNetworkDetect
#pragma mark 通用接口
+(NetworkType)getNetworkType
{
    struct sockaddr_in zeroAddress;
    bzero(&zeroAddress, sizeof(zeroAddress));
    zeroAddress.sin_len = sizeof(zeroAddress);
    zeroAddress.sin_family = AF_INET;
    SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress); //创建测试连接的引用：
    SCNetworkReachabilityFlags flags;
    SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);
    if ((flags & kSCNetworkReachabilityFlagsReachable) == 0)
    {
        return kNetworkOff;
    }
    NetworkType retVal = kNetworkOff;
    if ((flags & kSCNetworkReachabilityFlagsConnectionRequired) == 0)
    {
        retVal = kNetworkWifi;
    }
    if ((((flags & kSCNetworkReachabilityFlagsConnectionOnDemand ) != 0) ||
         (flags & kSCNetworkReachabilityFlagsConnectionOnTraffic) != 0))
    {
        if ((flags & kSCNetworkReachabilityFlagsInterventionRequired) == 0)
        {
            retVal = kNetworkWifi;
        }
    }
    
    if ((flags & kSCNetworkReachabilityFlagsIsWWAN) == kSCNetworkReachabilityFlagsIsWWAN)
    {
        if((flags & kSCNetworkReachabilityFlagsReachable) == kSCNetworkReachabilityFlagsReachable) {
            if ((flags & kSCNetworkReachabilityFlagsTransientConnection) == kSCNetworkReachabilityFlagsTransientConnection)
            {
                retVal = kNetworkWLan3G;
                if((flags & kSCNetworkReachabilityFlagsConnectionRequired) == kSCNetworkReachabilityFlagsConnectionRequired)
                {
                    retVal = kNetworkWLan2G;
                }
            }
        }
    }
    return retVal;
}
+(NetworkType)getCellularDataNetworkType
{
    if (ISIOS7)
    {
        CTTelephonyNetworkInfo *telephonyInfo = [CTTelephonyNetworkInfo new];
        NSString* wlanNetwork = telephonyInfo.currentRadioAccessTechnology;
        if (wlanNetwork == nil)
            return kNetworkOff;
        if([wlanNetwork isEqualToString:CTRadioAccessTechnologyGPRS  		 ])
        {
            return kNetworkGPRS;
        }
        else if([wlanNetwork isEqualToString:CTRadioAccessTechnologyEdge        ])
        {
            return kNetworkEdge;
        }
        else if([wlanNetwork isEqualToString:CTRadioAccessTechnologyWCDMA       ])
        {
            return kNetworkWCDMA;
        }
        else if([wlanNetwork isEqualToString:CTRadioAccessTechnologyHSDPA       ])
        {
            return kNetworkHSDPA;
        }
        else if([wlanNetwork isEqualToString:CTRadioAccessTechnologyHSUPA       ])
        {
            return kNetworkHSUPA;
        }
        else if([wlanNetwork isEqualToString:CTRadioAccessTechnologyCDMA1x      ])
        {
            return kNetworkCDMA1x;
        }
        else if([wlanNetwork isEqualToString:CTRadioAccessTechnologyCDMAEVDORev0])
        {
            return kNetworkCDMAEVDORev0;
        }
        else if([wlanNetwork isEqualToString:CTRadioAccessTechnologyCDMAEVDORevA])
        {
            return kNetworkCDMAEVDORevA;
        }
        else if([wlanNetwork isEqualToString:CTRadioAccessTechnologyCDMAEVDORevB])
        {
            return kNetworkCDMAEVDORevB;
        }
        else if([wlanNetwork isEqualToString:CTRadioAccessTechnologyeHRPD       ])
        {
            return kNetworkHRPD;
        }
        else if([wlanNetwork isEqualToString:CTRadioAccessTechnologyLTE         ])
        {
            return kNetworkLTE;
        }
    }
    return kNetworkWLan;
}
+(NSString*)getWifiSSID
{
    NSArray *ifs = (__bridge id)CNCopySupportedInterfaces();
    id info = nil;
    for (NSString *ifnam in ifs)
    {
        info = (__bridge id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
        if (info && [info count])
        {
            NSString *ssid=[info objectForKey:(__bridge NSString *)kCNNetworkInfoKeySSID];
            //NSString *bssid=[info objectForKey:(__bridge NSString *)kCNNetworkInfoKeyBSSID];
            //NSLog(@"interfaceName:%@ ssid:%@ bssid:%@",ifnam,ssid,bssid);
            return ssid;
        }
    }
    return nil;
}
+(BOOL)isReachable:(NSString*)address port:(NSInteger)port
{
    Reachability* poReach = [Reachability reachabilityWithHostname:[NSString stringWithFormat:@"%@:%d",address,port]];
    BOOL bRet = [poReach isReachable];
    return bRet;
}

@end

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