判断网络类型

获取网络数据类型，需要导入一个苹果api文件：Reachability(可以直接在官方上下载)，里面的枚举类型就是对应网络类型 kSCNetworkReachabilityFlagsIsWWAN、 kSCNetworkReachabilityFlagsReachable、kSCNetworkReachabilityFlagsTransientConnection、 kSCNetworkReachabilityFlagsConnectionRequired kSCNetworkReachabilityFlagsConnectionOnTraffic、kSCNetworkReachabilityFlagsInterventionRequired、 kSCNetworkReachabilityFlagsConnectionOnDemand、 kSCNetworkReachabilityFlagsIsLocalAddress、kSCNetworkReachabilityFlagsIsDirect

自定义的一个返回方法：

#pragma mark - 判断网络类型

+ (NSString *)getNetconnType{
    
    NSString *netconnType = @"";
    
    Reachability *reach = [Reachability reachabilityWithHostName:@"www.apple.com"];
    
    switch ([reach currentReachabilityStatus]) {
        case NotReachable:// 没有网络
        {
            
            netconnType = @"no_network";
        }
            break;
            
        case ReachableViaWiFi:// Wifi
        {
            netconnType = @"Wifi";
        }
            break;
            
        case ReachableViaWWAN:// 手机自带网络
        {
            // 获取手机网络类型
            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";
            }
        }
            break;
            
        default:
            break;
    }
    
    return netconnType;
}