这段代码是我在iOS 5时代写的，肯定有需要改的地方，但以此为线索，应该能减轻不少工作量。希望能帮到有需要的人哟~
WiFiScanner.h
#import <dlfcn.h>
@interface WiFiScanner : NSObject {
void *libHandle;
void *airportHandle;
int (*apple80211Open)(void *handle);
int (*apple80211Bind)(void *handle, NSString *en);
int (*apple80211Close)(void *handle);
int (*apple80211Scan)(void *handle, NSArray **result, void *requirements);
int (*apple80211Assoc)(void *handle, NSDictionary *apInfo, NSString *password);
int (*apple80211Disassoc)(void *handle);
}
- (void)scan;
- (void)connectTo:(NSDictionary *)apInfo withPassword:(NSString *)password;
- (void)disconnect;
@end
WiFiScanner.m
#import "WiFiTest.h"
@implementation WiFiScanner
- (id)init {
self = [super init];
libHandle = dlopen("/System/Library/SystemConfiguration/IPConfiguration.bundle/IPConfiguration", RTLD_LAZY); // iOS 8中留意一下/System/Library/SystemConfiguration/EAPOLController.bundle/eapolclient
apple80211Bind = dlsym(libHandle, "Apple80211BindToInterface");
apple80211Close = dlsym(libHandle, "Apple80211Close");
apple80211Scan = dlsym(libHandle, "Apple80211Scan"); // 扫描
apple80211Assoc = dlsym(libHandle, "Apple80211Associate"); // 连接，iOS 8中我粗略扫了一眼，没找到这个函数
apple80211Disassoc = dlsym(libHandle, "Apple80211Disassociate"); // 断开，iOS 8中我粗略扫了一眼，没找到这个函数
apple80211Open(&airportHandle);
apple80211Bind(airportHandle, @"en0");
return self;
}
- (void)scan {
NSDictionary *parameters = [NSDictionary alloc] init]; // 扫描参数，不填则获取所有信息
NSArray *scan_networks; // 存放扫描信息，每个对象均是一个NSDictionary
apple80211Scan(airportHandle, &scan_networks, parameters); // 同步扫描
for (id dictionary in scan_networks) {
if (dictionary) // 判断要连接哪一个热点
[self connectTo:dictionary withPassword:nil];
}
[parameters release];
}
- (void)connectTo:(NSDictionary *)apInfo withPassword:(NSString *)password {
apple80211Assoc(airportHandle, apInfo, password);
}
- (void)disconnect {
apple80211Disassoc(airportHandle);
}
- (void)dealloc {
apple80211Close(airportHandle);
dlclose(libHandle);
[super dealloc];
}
@end