iphone ipad 获取wifi信息 BSSID SSID

首先，app如果要上app store是没有办法获取wifi列表的～ 

这些WIFI扫描软件使用了苹果的私有函数apple80211.framework 

尽管不能合法(指能通过App Store的审核)的获取WIFI列表, 不过我们还是可以获取到当前Wifi连接的信息,比如SSID. BSSID

SSID全称Service Set IDentifier, 即Wifi网络的公开名称. 

BSSID 是指站点的 MAC 地址.

苹果在IOS v4.1+版本上提供了公开的方法来获取该信息. 

注意记得要在build phases中添加库SystemConfiguration.framework

#import <SystemConfiguration/CaptiveNetwork.h>

- (id)fetchSSIDInfo
{
NSArray *ifs = (id)CNCopySupportedInterfaces();
NSLog(@"%s: Supported interfaces: %@", __func__, ifs);
id info = nil;
for (NSString *ifnam in ifs) {
info = (id)CNCopyCurrentNetworkInfo((CFStringRef)ifnam);
NSLog(@"%s: %@ => %@", __func__, ifnam, info);
if (info && [info count]) {
break;
}
[info release];
}
[ifs release];
return [info autorelease];
}

ARC版本

#import <SystemConfiguration/CaptiveNetwork.h>

- (id)fetchSSIDInfo {
NSArray *ifs = (__bridge_transfer id)CNCopySupportedInterfaces();
NSLog(@"Supported interfaces: %@", ifs);
id info = nil;
for (NSString *ifnam in ifs) {
info = (__bridge_transfer id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
NSLog(@"%@ => %@", ifnam, info);  //单个数据info[@"SSID"]; info[@"BSSID"];
if (info && [info count]) { break; }
}
return info;
}

输出结果

2013-09-05 10:32:00.655 wifiTest[3534:707] -[wifiTestAppDelegate fetchSSIDInfo]: Supported interfaces: (
en0
)
2013-09-05 10:32:00.661 wifiTest [3534:707] -[wifiTestAppDelegate fetchSSIDInfo]: en0 => {
BSSID = "0:4:c3:a1:2b:22";
SSID = wifiname;
SSIDDATA = <01234567 76543210>;
}

BSSID 正确格式是 00:04:c3:a1:2b:22 但是输出以后却是0:4:c3:a1:2b:22 少了头0，可用一下方法补0

- (NSString *)standardFormateMAC:(NSString *)MAC {
NSArray * subStr = [MAC componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@":-"]];
NSMutableArray * subStr_M = [[NSMutableArray alloc] initWithCapacity:0];
for (NSString * str in subStr) {
if (1 == str.length) {
NSString * tmpStr = [NSString stringWithFormat:@"0%@", str];
[subStr_M addObject:tmpStr];
} else {
[subStr_M addObject:str];
}
}

NSString * formateMAC = [subStr_M componentsJoinedByString:@":"];
[subStr_M release];
return [formateMAC uppercaseString];
}