在ios扫描公共区域内wifi信息中，写了实现wifi扫描的一种方法，但是那种方法扫描出来的wifi信息不全，下面是扫描全部wifi信息的实现方法： #import#import #import #include #include #include @interface MSNetworksManager : NSObject { NSMutableDictionary *networks; NSArray *types; int autoScanInterval; bool scanning; bool autoScanning; void *libHandle; void *airportHandle; int (*open)(void *); int (*bind)(void *, NSString *); int (*close)(void *); int (*associate)(void *, NSDictionary*, NSString*); int (*scan)(void *, NSArray **, void *); //int (*open)(void *); //int (*bind)(void *, NSString *); //int (*close)(void *); //int (*scan)(void *, NSArray **, void *); //int (*associate)(void*, NSDictionary *, NSString *); int (*getpower)(void *, char *); int (*setpower)(void*, char*);}+ (MSNetworksManager *)sharedNetworksManager;+ (NSNumber *)numberFromBSSID:(NSString *) bssid;- (NSMutableDictionary *)networks;- (NSDictionary *)networks:(int) type;- (NSDictionary *)network:(NSString *) aNetwork;- (id)init;- (void)dealloc;- (int)numberOfNetworks;- (int)numberOfNetworks:(int) type;- (int)autoScanInterval;- (void)scan;- (void)removeNetwork:(NSString *)aNetwork;- (void)removeAllNetworks;- (void)removeAllNetworks:(int) type;- (void)autoScan:(bool)scan;- (bool)autoScan;- (void)scanSelector:(id)param;- (void)setAutoScanInterval:(int) scanInterval;- (int)associateNetwork: (NSDictionary *)bss: (NSString *)password;- (int)getPower: (char *)power;- (int)setPower: (char *)power;- (NSString *) localIPAddress; @end .m文件： #import "MSNetworksManager.h"static MSNetworksManager *NetworksManager; @implementation MSNetworksManager+ (MSNetworksManager *)sharedNetworksManager{ if (!NetworksManager) NetworksManager = [[MSNetworksManager alloc] init]; return NetworksManager;} + (NSNumber *)numberFromBSSID:(NSString *) bssid{ int x = 0; uint64_t longmac; int MAC_LEN = 6; short unsigned int *bs_in = malloc(sizeof(short unsigned int) * MAC_LEN); if (sscanf([bssid cStringUsingEncoding: [NSString defaultCStringEncoding]],"%hX:%hX:%hX:%hX:%hX:%hX",&bs_in[0], &bs_in[1], &bs_in[2], &bs_in[3], &bs_in[4], &bs_in[5]) == MAC_LEN) { for (x = 0; x < MAC_LEN; x++) longmac |= (uint64_t) bs_in[x] << ((MAC_LEN – x – 1) * 8); } else { NSLog(@"WARN: invalid mac address! %@",self); } free(bs_in); return [NSNumber numberWithUnsignedLongLong:longmac];} - (NSDictionary *)networks{ // TODO: Implement joining of network types return networks;}- (NSDictionary *)networks:(int) type{ // TODO: Implement selecting of network types if(type != 0) NSLog(@"WARN: Non 80211 networks are not supported. %@",self); return networks;} - (NSDictionary *)network:(NSString *) aNetwork{ return [networks objectForKey: aNetwork];} - (id)init{ self = [super init]; NetworksManager = self; networks = [[NSMutableDictionary alloc] init]; types = [NSArray arrayWithObjects:@"80211", @"Bluetooth", @"GSM", nil]; [types retain]; autoScanInterval = 5; //seconds // For iPhone 2.0 // libHandle = dlopen("/System/Library/PrivateFrameworks/Apple80211.framework/Apple80211", RTLD_LAZY); // For iPhone 3.0 libHandle = dlopen("/System/Library/SystemConfiguration/WiFiManager.bundle/WiFiManager", RTLD_LAZY); open = dlsym(libHandle, "Apple80211Open"); bind = dlsym(libHandle, "Apple80211BindToInterface"); close = dlsym(libHandle, "Apple80211Close"); scan = dlsym(libHandle, "Apple80211Scan"); associate = dlsym(libHandle, "Apple80211Associate"); getpower = dlsym(libHandle, "Apple80211GetPower"); setpower = dlsym(libHandle, "Apple80211SetPower"); open(&airportHandle); bind(airportHandle, @"en0"); return self;} - (void)dealloc{ close(&airportHandle); [super dealloc];} - (int)numberOfNetworks{ return [networks count];}- (int)numberOfNetworks:(int) type{ // TODO: Implement selecting of network types if(type != 0) NSLog(@"WARN: Non 80211 networks are not supported. %@",self); return [networks count];} - (int)autoScanInterval{ return autoScanInterval;} - (void)scan{// NSLog(@"Scanning…"); scanning = true; [[NSNotificationCenter defaultCenter] postNotificationName:@"startedScanning" object:self]; NSArray *scan_networks; NSMutableDictionary *parameters = [[NSMutableDictionary alloc] init]; [parameters setObject:@"YES" forKey:@"SCAN_MERGE"]; scan(airportHandle, &scan_networks, parameters); int i; //bool changed; [networks removeAllObjects]; for (i = 0; i < [scan_networks count]; i++) { [networks setObject:[[scan_networks objectAtIndex: i] objectForKey:@"BSSID"] forKey:[[scan_networks objectAtIndex: i] objectForKey:@"RSSI"]]; } NSLog(@"Scan Finished…");} - (void)removeNetwork:(NSString *)aNetwork{ [networks removeObjectForKey:aNetwork];} - (void)removeAllNetworks{ [networks removeAllObjects];} - (void)removeAllNetworks:(int) type{ if(type != 0) NSLog(@"WARN: Non 80211 networks are not supported. %@",self); [networks removeAllObjects];} - (void)autoScan:(bool) bScan{ autoScanning = bScan; if(bScan) { [self scan]; [NSTimer scheduledTimerWithTimeInterval:autoScanInterval target:self selector:@selector (scanSelector:) userInfo:nil repeats:NO]; } NSLog(@"WARN: Automatic scanning not fully supported yet. %@",self);} - (bool)autoScan{ return autoScanning;} - (void)scanSelector:(id)param { if(autoScanning) { [self scan]; [NSTimer scheduledTimerWithTimeInterval:autoScanInterval target:self selector:@selector (scanSelector:) userInfo:nil repeats:NO]; }} - (void)setAutoScanInterval:(int) scanInterval{ autoScanInterval = scanInterval;} - (int)associateNetwork:(NSDictionary *)bss: (NSString *)password{ if(bss!=nil) { NSLog(@"associateNetwork"); int ret = associate(airportHandle, bss, password); return ret; }else return -1;} - (int)getPower: (char *)power{ return getpower(airportHandle, power);} - (int)setPower: (char *)power{ return setpower(airportHandle, power);} - (NSString *) localIPAddress{ NSString *address = @"error"; struct ifaddrs *interfaces = NULL; struct ifaddrs *temp_addr = NULL; int success = 0; // retrieve the current interfaces – returns 0 on success success = getifaddrs(&interfaces); if (success == 0) { // Loop through linked list of interfaces temp_addr = interfaces; while(temp_addr != NULL) { if(temp_addr->ifa_addr->sa_family == AF_INET) { // Check if interface is en0 which is the wifi connection on the iPhone if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) { // Get NSString from C String address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)]; } } temp_addr = temp_addr->ifa_next; } } // Free memory freeifaddrs(interfaces); return address;} @end 添加到项目中即可。