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:

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1. #import<SystemConfiguration/CaptiveNetwork.h>
3. -(id)fetchSSIDInfo
4. {
5. NSArray*ifs=(id)CNCopySupportedInterfaces();
6. NSLog(@"%s:Supportedinterfaces:%@",__func__,ifs);
7. idinfo=nil;
8. for(NSString*ifnaminifs){
9. info=(id)CNCopyCurrentNetworkInfo((CFStringRef)ifnam);
10. NSLog(@"%s:%@=>%@",__func__,ifnam,info);
11. if(info&&[infocount]){
12. break;
13. }
14. [inforelease];
15. }
16. [ifsrelease];
17. return[infoautorelease];
18. }

对于ARC版本, 代码可简化如下:

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1. -(id)fetchSSIDInfo{
2. NSArray*ifs=(__bridge_transferid)CNCopySupportedInterfaces();
3. NSLog(@"Supportedinterfaces:%@",ifs);
4. idinfo=nil;
5. for(NSString*ifnaminifs){
6. info=(__bridge_transferid)CNCopyCurrentNetworkInfo((__bridgeCFStringRef)ifnam);
7. NSLog(@"%@=>%@",ifnam,info);
8. if(info&&[infocount]){break;}
9. }
10. returninfo;
11. }

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.

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1. #import<SystemConfiguration/CaptiveNetwork.h>

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1. -(id)fetchSSIDInfo
2. {
3. NSArray*ifs=(id)CNCopySupportedInterfaces();
4. NSLog(@"%s:Supportedinterfaces:%@",__func__,ifs);
5. idinfo=nil;
6. for(NSString*ifnaminifs){
7. info=(id)CNCopyCurrentNetworkInfo((CFStringRef)ifnam);
8. if(info&&[infocount]){
9. break;
10. }
11. [inforelease];
12. }
13. [ifsrelease];
14. return[infoautorelease];
15. }
17. -(NSString*)currentWifiSSID{
18. //Doesnotworkonthesimulator.
19. NSString*ssid=nil;
20. NSArray*ifs=(id)CNCopySupportedInterfaces();
21. NSLog(@"ifs:%@",ifs);
22. for(NSString*ifnaminifs){
23. NSDictionary*info=(id)CNCopyCurrentNetworkInfo((CFStringRef)ifnam);
24. NSLog(@"dici：%@",[infoallKeys]);
25. if(info[@"SSIDD"]){
26. ssid=info[@"SSID"];
28. }
29. }
30. returnssid;
31. }
33. -(void)viewDidLoad
34. {
35. [superviewDidLoad];
37. tempLabel=[[UILabelalloc]initWithFrame:CGRectMake(50,40,200,40)];
38. tempLabel.textAlignment=NSTextAlignmentCenter;
39. [self.viewaddSubview:tempLabel];
40. NSDictionary*ifs=[selffetchSSIDInfo];
41. NSString*ssid=[[ifsobjectForKey:@"SSID"]lowercaseString];
42. tempLabel.text=ssid;
44. }

log 信息 ：

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1. 2013-06-0521:39:14.357wifiNameDemo[9877:707]dici：{
2. BSSID="f4:ec:38:40:cc:e8";
3. SSID="Nice_Apple";
4. SSIDDATA=<4e6963655f4170706c65>;
5. }
6. 2013-06-0521:39:14.360wifiNameDemo[9877:707]Nice_Apple

ARC 版本：

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1. -(id)fetchSSIDInfo{
2. NSArray*ifs=(__bridge_transferid)CNCopySupportedInterfaces();
3. NSLog(@"Supportedinterfaces:%@",ifs);
4. idinfo=nil;
5. for(NSString*ifnaminifs){
6. info=(__bridge_transferid)CNCopyCurrentNetworkInfo((__bridgeCFStringRef)ifnam);
7. NSLog(@"%@=>%@",ifnam,info);
8. if(info&&[infocount]){break;}
9. }
10. returninfo;
11. }

效果如下：

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1. #import<SystemConfiguration/CaptiveNetwork.h>

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1. -(id)fetchSSIDInfo
2. {
3. NSArray*ifs=(id)CNCopySupportedInterfaces();
4. NSLog(@"%s:Supportedinterfaces:%@",__func__,ifs);
5. idinfo=nil;
6. for(NSString*ifnaminifs){
7. info=(id)CNCopyCurrentNetworkInfo((CFStringRef)ifnam);
8. if(info&&[infocount]){
9. break;
10. }
11. [inforelease];
12. }
13. [ifsrelease];
14. return[infoautorelease];
15. }
17. -(NSString*)currentWifiSSID{
18. //Doesnotworkonthesimulator.
19. NSString*ssid=nil;
20. NSArray*ifs=(id)CNCopySupportedInterfaces();
21. NSLog(@"ifs:%@",ifs);
22. for(NSString*ifnaminifs){
23. NSDictionary*info=(id)CNCopyCurrentNetworkInfo((CFStringRef)ifnam);
24. NSLog(@"dici：%@",[infoallKeys]);
25. if(info[@"SSIDD"]){
26. ssid=info[@"SSID"];
28. }
29. }
30. returnssid;
31. }
33. -(void)viewDidLoad
34. {
35. [superviewDidLoad];
37. tempLabel=[[UILabelalloc]initWithFrame:CGRectMake(50,40,200,40)];
38. tempLabel.textAlignment=NSTextAlignmentCenter;
39. [self.viewaddSubview:tempLabel];
40. NSDictionary*ifs=[selffetchSSIDInfo];
41. NSString*ssid=[[ifsobjectForKey:@"SSID"]lowercaseString];
42. tempLabel.text=ssid;
44. }

log 信息 ：

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1. 2013-06-0521:39:14.357wifiNameDemo[9877:707]dici：{
2. BSSID="f4:ec:38:40:cc:e8";
3. SSID="Nice_Apple";
4. SSIDDATA=<4e6963655f4170706c65>;
5. }
6. 2013-06-0521:39:14.360wifiNameDemo[9877:707]Nice_Apple

ARC 版本：

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1. -(id)fetchSSIDInfo{
2. NSArray*ifs=(__bridge_transferid)CNCopySupportedInterfaces();
3. NSLog(@"Supportedinterfaces:%@",ifs);
4. idinfo=nil;
5. for(NSString*ifnaminifs){
6. info=(__bridge_transferid)CNCopyCurrentNetworkInfo((__bridgeCFStringRef)ifnam);
7. NSLog(@"%@=>%@",ifnam,info);
8. if(info&&[infocount]){break;}
9. }
10. returninfo;
11. }

效果如下：