iOS开发 获取wifi信息

最近在做测速SDK开发，对iOS端wifi进行了调研，分享一下调研成果
从 iOS 4.1 开始，Apple 就提供了「CNCopyCurrentNetworkInfo」这项函数，调用时将会得到 SSID 与 BSSID等信息。 iOS 12 开始开发者必须在Xcode开启Access WiFi Information才能返回wifi信息。而在 iOS 13后，条件将变得更为严格，又增加了开启定位权限。
iOS13获取Wi-Fi信息步骤（必须真机调式）

• info.plist中添加

<key>NSLocationWhenInUseUsageDescription</key>
    <string>获取wifi信息需要开启定位权限</string>

• Xcode开启Access WiFi Information权限
  截屏2021-10-10 下午12.18.52.png
• 引用SystemConfiguration.framework

//导入头文件
#import <SystemConfiguration/SystemConfiguration.h>
#import <SystemConfiguration/CaptiveNetwork.h>
#import <CoreLocation/CoreLocation.h>

- (NSDictionary *)getWifiInfo{
//    if (@available(iOS 13.0, *)) {
//        检查定位权限
//        if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied) {
//            [[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
//        }
//        CLLocationManager* cllocation = [[CLLocationManager alloc] init];
//        if(![CLLocationManager locationServicesEnabled] || [CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined){
//            [cllocation requestWhenInUseAuthorization];
//        }
//    }
    NSDictionary *info = nil;
    NSArray *ifs = (__bridge_transfer id)CNCopySupportedInterfaces();
    if (ifs.count == 0) {
        return nil;
    }
    for (NSString *ifnam in ifs) {
        info = (__bridge_transfer id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
    }
    return info;
    
}

输出
{
    BSSID = "";
    SSID = "";
    SSIDDATA = {length = , bytes = };
}