iOS-获取当前连接WiFi热点的信息

前提需要配置工程

Target -> Capabilities -> Access WiFi Information -> ON

判断是否连接WiFi

见下面附的三种方法

获取连接WiFi的信息

导入头文件
#import 
获取WiFi的SSID(名字)
//获取当前WiFi热点的名字
+ (NSString *)wifiName {
    NSArray *ifs = CFBridgingRelease(CNCopySupportedInterfaces());
    id info = nil;
    for (NSString *ifname in ifs) {
        info = (__bridge_transfer id)CNCopyCurrentNetworkInfo((CFStringRef) ifname);
        if (info && [info count]) {
            break;
        }
    }
    NSDictionary *dic = (NSDictionary *)info;
    NSString *ssid = [[dic objectForKey:@"SSID"] lowercaseString];
    if (ssid) {
        return ssid;
    }else {
        return @"获取WIFi热点名字失败";
    }
    
}
获取WiFi的BSSID(Mac地址)
//获取当前热点的Mac地址
+ (NSString *)wifiMac {
    NSArray *ifs = CFBridgingRelease(CNCopySupportedInterfaces());
    id info = nil;
    for (NSString *ifname in ifs) {
        info = (__bridge_transfer id)CNCopyCurrentNetworkInfo((CFStringRef) ifname);
        if (info && [info count]) {
            break;
        }
    }
    NSDictionary *dic = (NSDictionary *)info;
    NSString *bssid = [dic objectForKey:@"BSSID"];
    if (bssid) {
        return bssid;
    }else {
        return @"获取WiFi热点Mac地址失败";
    }
}

附:判断当前连接的网络类型方法

1、苹果官方demo判断的方法:Reachability

这是苹果的官方演示demo中使用到的方法,我们可以到苹果官方文档里下载Demo(点击左上角Download Sample Code 即可下载),然后把Demo里的Reachability.h和.m考到自己项目中,并在Build Phases 的 Link Binary 添加SystemConfiguration.framework框架,然后在需要使用的地方导入Reachability头文件
在 Reachability头文件中我们可以看到无网络,wifi和蜂窝网三个网络状态的枚举值,如下:

typedef enum : NSInteger {
    NotReachable = 0,
    ReachableViaWiFi,
    ReachableViaWWAN
} NetworkStatus;

(1)获取网络状态:
在iOS 7之前,当用户网络为蜂窝网络时,是没法判断3G、4G等网络类型的,iOS 7 后是可以判断的

-(NSString *)internetStatus {

    Reachability *reachability   = [Reachability reachabilityWithHostName:@"www.apple.com"];
    NetworkStatus internetStatus = [reachability currentReachabilityStatus];
    NSString *net = @"WIFI";
    switch (internetStatus) {
        case ReachableViaWiFi:
            net = @"WIFI";
            break;

        case ReachableViaWWAN:
            net = @"蜂窝数据";
            //net = [self getNetType ];   //判断具体类型
            break;

        case NotReachable:
            net = @"当前无网路连接";

        default:
            break;
    }

    return net;
}

(2)当用户为手机自带网络时,判断具体网络类型
这时可以使用系统自带的API来判断是2G、3G还是4G,这就要使用到CTTelephonyNetworkInfo这类,记得在工程添加CoreTelephony.framework,并导入头文件

- (NSString *)getNetType
{
       CTTelephonyNetworkInfo *info = [[CTTelephonyNetworkInfo alloc] init];

            NSString *currentStatus = info.currentRadioAccessTechnology;

            if ([currentStatus isEqualToString:@"CTRadioAccessTechnologyGPRS"]) {

                netconnType = @"GPRS";
            }else if ([currentStatus isEqualToString:@"CTRadioAccessTechnologyEdge"]) {

                netconnType = @"2.75G EDGE";
            }else if ([currentStatus isEqualToString:@"CTRadioAccessTechnologyWCDMA"]){

                netconnType = @"3G";
            }else if ([currentStatus isEqualToString:@"CTRadioAccessTechnologyHSDPA"]){

                netconnType = @"3.5G HSDPA";
            }else if ([currentStatus isEqualToString:@"CTRadioAccessTechnologyHSUPA"]){

                netconnType = @"3.5G HSUPA";
            }else if ([currentStatus isEqualToString:@"CTRadioAccessTechnologyCDMA1x"]){

                netconnType = @"2G";
            }else if ([currentStatus isEqualToString:@"CTRadioAccessTechnologyCDMAEVDORev0"]){

                netconnType = @"3G";
            }else if ([currentStatus isEqualToString:@"CTRadioAccessTechnologyCDMAEVDORevA"]){

                netconnType = @"3G";
            }else if ([currentStatus isEqualToString:@"CTRadioAccessTechnologyCDMAEVDORevB"]){

                netconnType = @"3G";
            }else if ([currentStatus isEqualToString:@"CTRadioAccessTechnologyeHRPD"]){

                netconnType = @"HRPD";
            }else if ([currentStatus isEqualToString:@"CTRadioAccessTechnologyLTE"]){

                netconnType = @"4G";
            }
}

用此方法判断的蜂窝网络类型有如下类型:

CTRadioAccessTechnologyGPRS         //介于2G和3G之间,也叫2.5G ,过度技术    
CTRadioAccessTechnologyEdge         //EDGE为GPRS到第三代移动通信的过渡,EDGE俗称2.75G   
CTRadioAccessTechnologyWCDMA           
CTRadioAccessTechnologyHSDPA            //亦称为3.5G(3?G)  
CTRadioAccessTechnologyHSUPA            //3G到4G的过度技术  
CTRadioAccessTechnologyCDMA1x       //3G      
CTRadioAccessTechnologyCDMAEVDORev0    //3G标准  
CTRadioAccessTechnologyCDMAEVDORevA    
CTRadioAccessTechnologyCDMAEVDORevB    
CTRadioAccessTechnologyeHRPD        //电信使用的一种3G到4G的演进技术, 3.75G       
CTRadioAccessTechnologyLTE          //接近4G   

  1. 通过系统statusBar判断
    这种方法在iPhone X 上可能引起奔溃,可能是苹果修改了statusBar的keyPath,所以拿到的东西为nil,导致崩溃

//获取当前网络状态 (iPhone X 上可能引发崩溃)

+ (NSString *)networkingStatesFromStatebar {  
    // 状态栏是由当前app控制的,首先获取当前app  
    UIApplication *app = [UIApplication sharedApplication];  

    //iphone X 会在这里崩溃
    NSArray *children = [[[app valueForKeyPath:@"statusBar"] valueForKeyPath:@"foregroundView"] subviews];    
      
    int type = 0;  
    for (id child in children) {  
        if ([child isKindOfClass:[NSClassFromString(@"UIStatusBarDataNetworkItemView") class]]) {  
            type = [[child valueForKeyPath:@"dataNetworkType"] intValue];  
        }  
    }  
      
    NSString *stateString = @"wifi";  
      
    switch (type) {  
        case 0:  
            stateString = @"notReachable";  
            break;  
              
        case 1:  
            stateString = @"2G";  
            break;  
              
        case 2:  
            stateString = @"3G";  
            break;  
              
        case 3:  
            stateString = @"4G";  
            break;  
              
        case 4:  
            stateString = @"LTE";  
            break;  
              
        case 5:  
            stateString = @"wifi";  
            break;  
              
        default:  
            break;  
    }  
      
    return stateString;  
}  
  1. 通过AFNetworking
    此方法可以写在AppDelegate中,每当网络状态发生变化时,就可以发通知,实时监测网络变化,然后做相应的处理
#pragma mark - ------------- 监测网络状态 -------------
- (void)monitorNetworking
{
    [[AFNetworkReachabilityManager sharedManager] startMonitoring];
    [[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        switch (status) {
            case -1:
                NSLog(@"未知网络");
                break;
            case 0:
                NSLog(@"网络不可达");
                break;
            case 1:
            {
                NSLog(@"GPRS网络");
                //发通知,带头搞事
                [[NSNotificationCenter defaultCenter] postNotificationName:@"monitorNetworking" object:@"1" userInfo:nil];
            }
                break;
            case 2:
            {
                NSLog(@"wifi网络");
                //发通知,搞事情
                [[NSNotificationCenter defaultCenter] postNotificationName:@"monitorNetworking" object:@"2" userInfo:nil];
            }
                break;
            default:
                break;
        }
        if (status == AFNetworkReachabilityStatusReachableViaWWAN || status == AFNetworkReachabilityStatusReachableViaWiFi) {
            NSLog(@"有网");
        }else{
            NSLog(@"没网");
        }
    }];
}

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