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: 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];
- }
对于ARC版本, 代码可简化如下:
- - (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);
- if (info && [info count]) { break; }
- }
- return info;
- }
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