iOS下的WiFi开发
iOS下Wi-Fi开发需要添加依赖库SystemConfiguration.framework，在需要使用Wi-Fi信息的控制器下引入头文件#import <SystemConfiguration/CaptiveNetwork.h>
1，Wi-Fi热点获取
+(NSString *) currentWifiSSID { #if TARGET_OS_SIMULATOR return @"(simulator)"; #else NSArray *ifs = (__bridge id)CNCopySupportedInterfaces(); id info = nil; for (NSString *ifnam in ifs) { info = (__bridge id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam); if (info && [info count]) { break; } } NSDictionary *dctySSID = (NSDictionary *)info; NSString *ssid = [dctySSID objectForKey:@"SSID"] ; return ssid; #endif }
2，取得本机Wi-Fi的IP地址
#include <arpa/inet.h> #include <netdb.h> #include <net/if.h> #include <ifaddrs.h> #import <dlfcn.h> +(NSString *) localWiFiIPAddress { BOOL success; struct ifaddrs * addrs; const struct ifaddrs * cursor; success = getifaddrs(&addrs) == 0; if (success) { cursor = addrs; while (cursor != NULL) { // the second test keeps from picking up the loopback address if (cursor->ifa_addr->sa_family == AF_INET && (cursor->ifa_flags & IFF_LOOPBACK) == 0) { NSString *name = [NSString stringWithUTF8String:cursor->ifa_name]; if ([name isEqualToString:@"en0"]) // Wi-Fi adapter return [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)cursor->ifa_addr)->sin_addr)]; } cursor = cursor->ifa_next; } freeifaddrs(addrs); } return nil; }
3，获取当前Wi-Fi的名称
- (void)GetWifiName{ NSString *wifiName = @"Not Found"; CFArrayRef myArray = CNCopySupportedInterfaces(); if (myArray != nil) { CFDictionaryRef myDict =CNCopyCurrentNetworkInfo(CFArrayGetValueAtIndex(myArray, 0)); if (myDict != nil) { NSDictionary *dict = (NSDictionary*)CFBridgingRelease(myDict); wifiName = [dict valueForKey:@"SSID"]; } NSLog(@"wifiName:%@", wifiName); }
注意：需要真机才能测试！模拟器下返回空。
4，打开系统设置
从应用跳到系统设置里的WiFi界面有这个需求存在吗？答案是肯定的。
在没有网的状态下，你可能想提醒用户去设置界面连接WiFi。如果不能跳到WiFi界面，只能在APP里面做出文字提示。这样很多小白用户可能不会看提示，只会觉得APP没有做好。
+(void)openSystemSetting:(NSString *)settingName{ //iOS8 才有效 float version = [[[UIDevice currentDevice] systemVersion] floatValue]; #if __IPHONE_OS_VERSION_MAX_ALLOWED < __IPHONE_8_0 #define SETTING_URL @"app-settings:" #else #define SETTING_URL UIApplicationOpenSettingsURLString #endif // NSLog(UIApplicationOpenSettingsURLString); if (version >= 8.0){ [[UIApplication sharedApplication] openURL: [NSURL URLWithString:SETTING_URL]]; } }
UIApplication.sharedApplication().openURL(NSURL(string: "prefs:root=WIFI")!)
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