iOS端获取当前WiFi，IP名称以及连接WiFi后返回处理

项目要想获得WiFi信息先得打开一些权限
1.添加依赖库
target->buildphases->link Binary-> 添加 NetworkExtension.framework

添加依赖库

2.在target->signing&capabilities里面添加Hotspot Configuration权限和Access WiFi Information权限

添加权限

3.上代码
查找好多资料，常规方法
1.先获取当前WiFi名称

//获取当前WiFi名称
-(NSString *)getSSID{
    NSString *ssid = @"Not Found";
    CFArrayRef myArray = CNCopySupportedInterfaces();
    if (myArray != nil) {
        CFDictionaryRef myDict = CNCopyCurrentNetworkInfo(CFArrayGetValueAtIndex(myArray, 0));
        if (myDict != nil) {
            NSDictionary * dict = (NSDictionary*)CFBridgingRelease(myDict);
            ssid = [dict valueForKey:@"SSID"];
        }
    }
    return ssid;
}

获取IP名称

//首先导入头文件信息 （补充，目前是获取不到设备的mac地址的，苹果已禁，如果有请告知）
#include 
#include 
#include 
#import 

#define IOS_CELLULAR    @"pdp_ip0"
#define IOS_WIFI        @"en0"
//#define IOS_VPN       @"utun0"
#define IP_ADDR_IPv4    @"ipv4"
#define IP_ADDR_IPv6    @"ipv6"

@implementation WBNetInfoModel
//获取设备当前网络IP地址
+ (NSString *)getIPAddress:(BOOL)preferIPv4
{
    NSArray *searchArray = preferIPv4 ?
    @[ /*IOS_VPN @"/" IP_ADDR_IPv4, IOS_VPN @"/" IP_ADDR_IPv6,*/ IOS_WIFI @"/" IP_ADDR_IPv4, IOS_WIFI @"/" IP_ADDR_IPv6, IOS_CELLULAR @"/" IP_ADDR_IPv4, IOS_CELLULAR @"/" IP_ADDR_IPv6 ] :
    @[ /*IOS_VPN @"/" IP_ADDR_IPv6, IOS_VPN @"/" IP_ADDR_IPv4,*/ IOS_WIFI @"/" IP_ADDR_IPv6, IOS_WIFI @"/" IP_ADDR_IPv4, IOS_CELLULAR @"/" IP_ADDR_IPv6, IOS_CELLULAR @"/" IP_ADDR_IPv4 ] ;

    NSDictionary *addresses = [self getIPAddresses];
    NSLog(@"addresses: %@", addresses);

    __block NSString *address;
    [searchArray enumerateObjectsUsingBlock:^(NSString *key, NSUInteger idx, BOOL *stop)
     {
         address = addresses[key];
         if(address) *stop = YES;
     } ];
    return address ? address : @"0.0.0.0";
}

//获取所有相关IP信息
+ (NSDictionary *)getIPAddresses
{
    NSMutableDictionary *addresses = [NSMutableDictionary dictionaryWithCapacity:8];

    // retrieve the current interfaces - returns 0 on success
    struct ifaddrs *interfaces;
    if(!getifaddrs(&interfaces)) {
        // Loop through linked list of interfaces
        struct ifaddrs *interface;
        for(interface=interfaces; interface; interface=interface->ifa_next) {
            if(!(interface->ifa_flags & IFF_UP) /* || (interface->ifa_flags & IFF_LOOPBACK) */ ) {
                continue; // deeply nested code harder to read
            }
            const struct sockaddr_in *addr = (const struct sockaddr_in*)interface->ifa_addr;
            char addrBuf[ MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN) ];
            if(addr && (addr->sin_family==AF_INET || addr->sin_family==AF_INET6)) {
                NSString *name = [NSString stringWithUTF8String:interface->ifa_name];
                NSString *type;
                if(addr->sin_family == AF_INET) {
                    if(inet_ntop(AF_INET, &addr->sin_addr, addrBuf, INET_ADDRSTRLEN)) {
                        type = IP_ADDR_IPv4;
                    }
                } else {
                    const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6*)interface->ifa_addr;
                    if(inet_ntop(AF_INET6, &addr6->sin6_addr, addrBuf, INET6_ADDRSTRLEN)) {
                        type = IP_ADDR_IPv6;
                    }
                }
                if(type) {
                    NSString *key = [NSString stringWithFormat:@"%@/%@", name, type];
                    addresses[key] = [NSString stringWithUTF8String:addrBuf];
                }
            }
        }
        // Free memory
        freeifaddrs(interfaces);
    }
    return [addresses count] ? addresses : nil;
}

3.连接WiFi

//连接WiFi
- (void)sysConnectWifiWithWifiSSID:(NSString *)wifiSSID wifiKey:(NSString *)wifiKey{
    NSString *ssid = wifiSSID;
    NSString *passphrase = wifiKey;
    NSString *connectSsid = @"Not Found";
    BOOL isWEP = NO;
    CFArrayRef myArray = CNCopySupportedInterfaces();
    if (myArray != nil) {
        CFDictionaryRef myDict = CNCopyCurrentNetworkInfo(CFArrayGetValueAtIndex(myArray, 0));
        if (myDict != nil) {
            NSDictionary *dict = (NSDictionary*)CFBridgingRelease(myDict);
            connectSsid = [dict valueForKey:@"SSID"];
        }
    }
    if ([connectSsid isEqualToString:ssid]){
        /// MARK: 连接Wi-Fi
        self.connectType = ConnectTypeAlready;
        NSLog(@"你已连接到该WiFi,不用重复连接:%ld",self.connectType);
        return;
    }
    __weak typeof(self) weakSelf = self;
    if (@available(iOS 11.0, *)) {
        NEHotspotConfiguration *configuration = [[NEHotspotConfiguration alloc]initWithSSID:ssid passphrase:passphrase isWEP:isWEP];
        [[NEHotspotConfigurationManager sharedManager]applyConfiguration:configuration completionHandler:^(NSError * _Nullable error) {
            if (!error) {
                //根据名称判断是否连接成功
                if ([[self getSSID]isEqualToString:ssid]) {
                    weakSelf.connectType = ConnectTypeSuccess;
                    NSLog(@"连接成功:%ld",self.connectType);                
                }else{
                     if(error.code ==0){
                            weakSelf.connectType = ConnectTypeFailure;
                            NSLog(@"连接失败:%ld",self.connectType);
                    } 
                }
            }
        }];
    }
}