iPhone,iPad如何获取WIFI名称即SSID

2010年开始苹果清理了一批APP Store上的WIFI扫描软件, 缘由语焉不详.

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.

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

苹果在IOS v4.1+版本上提供了公开的方法来获取该信息.

示范代码如下:

#import<SystemConfiguration/CaptiveNetwork.h>

-(id)fetchSSIDInfo
{
NSArray*ifs=(id)CNCopySupportedInterfaces();
NSLog(@"%s:Supportedinterfaces:%@",__func__,ifs);
idinfo=nil;
for(NSString*ifnaminifs){
info=(id)CNCopyCurrentNetworkInfo((CFStringRef)ifnam);
NSLog(@"%s:%@=>%@",__func__,ifnam,info);
if(info&&[infocount]){
break;
}
[inforelease];
}
[ifsrelease];
return[infoautorelease];
}

对于ARC版本, 代码可简化如下:

-(id)fetchSSIDInfo{
NSArray*ifs=(__bridge_transferid)CNCopySupportedInterfaces();
NSLog(@"Supportedinterfaces:%@",ifs);
idinfo=nil;
for(NSString*ifnaminifs){
info=(__bridge_transferid)CNCopyCurrentNetworkInfo((__bridgeCFStringRef)ifnam);
NSLog(@"%@=>%@",ifnam,info);
if(info&&[infocount]){break;}
}
returninfo;
}

参考链接:

1. http://stackoverflow.com/questions/5198716/iphone-get-ssid-without-private-library

2. http://answers.yahoo.com/question/index?qid=20100529040141AAKd8dO

SSID全称Service Set IDentifier, 即Wifi网络的公开名称.在IOS 4.1以上版本提供了公开的方法来获取该信息.

#import<SystemConfiguration/CaptiveNetwork.h>

-(id)fetchSSIDInfo
{
NSArray*ifs=(id)CNCopySupportedInterfaces();
NSLog(@"%s:Supportedinterfaces:%@",__func__,ifs);
idinfo=nil;
for(NSString*ifnaminifs){
info=(id)CNCopyCurrentNetworkInfo((CFStringRef)ifnam);
if(info&&[infocount]){
break;
}
[inforelease];
}
[ifsrelease];
return[infoautorelease];
}

-(NSString*)currentWifiSSID{
//Doesnotworkonthesimulator.
NSString*ssid=nil;
NSArray*ifs=(id)CNCopySupportedInterfaces();
NSLog(@"ifs:%@",ifs);
for(NSString*ifnaminifs){
NSDictionary*info=(id)CNCopyCurrentNetworkInfo((CFStringRef)ifnam);
NSLog(@"dici：%@",[infoallKeys]);
if(info[@"SSIDD"]){
ssid=info[@"SSID"];

}
}
returnssid;
}

-(void)viewDidLoad
{
[superviewDidLoad];

tempLabel=[[UILabelalloc]initWithFrame:CGRectMake(50,40,200,40)];
tempLabel.textAlignment=NSTextAlignmentCenter;
[self.viewaddSubview:tempLabel];
NSDictionary*ifs=[selffetchSSIDInfo];
NSString*ssid=[[ifsobjectForKey:@"SSID"]lowercaseString];
tempLabel.text=ssid;

}

log 信息 ：

2013-06-0521:39:14.357wifiNameDemo[9877:707]dici：{
BSSID="f4:ec:38:40:cc:e8";
SSID="Nice_Apple";
SSIDDATA=<4e6963655f4170706c65>;
}
2013-06-0521:39:14.360wifiNameDemo[9877:707]Nice_Apple

ARC 版本：

-(id)fetchSSIDInfo{
NSArray*ifs=(__bridge_transferid)CNCopySupportedInterfaces();
NSLog(@"Supportedinterfaces:%@",ifs);
idinfo=nil;
for(NSString*ifnaminifs){
info=(__bridge_transferid)CNCopyCurrentNetworkInfo((__bridgeCFStringRef)ifnam);
NSLog(@"%@=>%@",ifnam,info);
if(info&&[infocount]){break;}
}
returninfo;
}

效果如下：

#import<SystemConfiguration/CaptiveNetwork.h>

-(id)fetchSSIDInfo
{
NSArray*ifs=(id)CNCopySupportedInterfaces();
NSLog(@"%s:Supportedinterfaces:%@",__func__,ifs);
idinfo=nil;
for(NSString*ifnaminifs){
info=(id)CNCopyCurrentNetworkInfo((CFStringRef)ifnam);
if(info&&[infocount]){
break;
}
[inforelease];
}
[ifsrelease];
return[infoautorelease];
}

-(NSString*)currentWifiSSID{
//Doesnotworkonthesimulator.
NSString*ssid=nil;
NSArray*ifs=(id)CNCopySupportedInterfaces();
NSLog(@"ifs:%@",ifs);
for(NSString*ifnaminifs){
NSDictionary*info=(id)CNCopyCurrentNetworkInfo((CFStringRef)ifnam);
NSLog(@"dici：%@",[infoallKeys]);
if(info[@"SSIDD"]){
ssid=info[@"SSID"];

}
}
returnssid;
}

-(void)viewDidLoad
{
[superviewDidLoad];

tempLabel=[[UILabelalloc]initWithFrame:CGRectMake(50,40,200,40)];
tempLabel.textAlignment=NSTextAlignmentCenter;
[self.viewaddSubview:tempLabel];
NSDictionary*ifs=[selffetchSSIDInfo];
NSString*ssid=[[ifsobjectForKey:@"SSID"]lowercaseString];
tempLabel.text=ssid;

}

log 信息 ：

2013-06-0521:39:14.357wifiNameDemo[9877:707]dici：{
BSSID="f4:ec:38:40:cc:e8";
SSID="Nice_Apple";
SSIDDATA=<4e6963655f4170706c65>;
}
2013-06-0521:39:14.360wifiNameDemo[9877:707]Nice_Apple

ARC 版本：

-(id)fetchSSIDInfo{
NSArray*ifs=(__bridge_transferid)CNCopySupportedInterfaces();
NSLog(@"Supportedinterfaces:%@",ifs);
idinfo=nil;
for(NSString*ifnaminifs){
info=(__bridge_transferid)CNCopyCurrentNetworkInfo((__bridgeCFStringRef)ifnam);
NSLog(@"%@=>%@",ifnam,info);
if(info&&[infocount]){break;}
}
returninfo;
}

效果如下：