如何使用CaptiveNetwork获取当前WiFi热点名称
我需要获取当前连接的Wi-Fi热点的名称，例如"BT OpenZone“
有人告诉我可以用CaptiveNetwork特别是CNCopyCurrentNetworkInfo来完成
到目前为止我的代码如下：
#import <SystemConfiguration/CaptiveNetwork.h>
...
// Get the dictionary containing the captive network infomation
CFDictionaryRef captiveNtwrkDict = CNCopyCurrentNetworkInfo(kCNNetworkInfoKeySSID);
// Get the count of the key value pairs to test if it has worked
int count = CFDictionaryGetCount(captiveNtwrkDict);
NSLog(@"Count of dict:%d",count);当代码在WiFi热点中的设备上运行时，captiveNtwrkDict为空。
有没有人能让它工作起来？我在CaptiveNetworks上找不到太多的文档或任何示例代码示例...任何帮助都将不胜感激。
回答 4
Stack Overflow用户
发布于 2011-01-17 23:28:16
您需要找出哪些网络可用，然后将它们传递给CNCopyCurrentNetworkInfo。例如：
CFArrayRef myArray = CNCopySupportedInterfaces();
CFDictionaryRef myDict = CNCopyCurrentNetworkInfo(CFArrayGetValueAtIndex(myArray, 0));然后，您可以使用您得到的字典上的kCNNetworkInfoKeySSID (myDict)来查找...and。不要忘记适当地释放/管理内存。
Stack Overflow用户
发布于 2015-10-15 02:01:50
iOS 12、swift 4.2的更新
iOS 12
您必须从功能启用Access WiFi信息。
重要信息要在iOS 12和更高版本中使用此功能，请在Xcode中为您的应用程序启用访问WiFi信息功能。启用此功能后，Xcode会自动将Access WiFi信息权限添加到您的权限文件和应用程序ID中。Documentation link
Swift4.2 4.2
public class SSID {
class func fetchSSIDInfo() -> String {
var currentSSID = ""
if let interfaces = CNCopySupportedInterfaces() {
for i in 0..<CFArrayGetCount(interfaces) {
let interfaceName: UnsafeRawPointer = CFArrayGetValueAtIndex(interfaces, i)
let rec = unsafeBitCast(interfaceName, to: AnyObject.self)
let unsafeInterfaceData = CNCopyCurrentNetworkInfo("\(rec)" as CFString)
if let interfaceData = unsafeInterfaceData as? [String: AnyObject] {
currentSSID = interfaceData["SSID"] as! String
let BSSID = interfaceData["BSSID"] as! String
let SSIDDATA = interfaceData["SSIDDATA"]
debugPrint("ssid=\(currentSSID), BSSID=\(BSSID), SSIDDATA=\(SSIDDATA)")
}
}
}
return currentSSID
}
}iOS 10更新
iOS 10中不再推荐使用CNCopySupportedInterfaces。(API Reference)
您需要导入SystemConfiguration/CaptiveNetwork.h并将SystemConfiguration.framework添加到目标的链接库(在build phases下)。
以下是swift (RikiRiocma's Answer)中的代码片段
import Foundation
import SystemConfiguration.CaptiveNetwork
public class SSID {
class func fetchSSIDInfo() -> String {
var currentSSID = ""
if let interfaces:CFArray! = CNCopySupportedInterfaces() {
for i in 0..<CFArrayGetCount(interfaces){
let interfaceName: UnsafePointer<Void> = CFArrayGetValueAtIndex(interfaces, i)
let rec = unsafeBitCast(interfaceName, AnyObject.self)
let unsafeInterfaceData = CNCopyCurrentNetworkInfo("\(rec)")
if unsafeInterfaceData != nil {
let interfaceData = unsafeInterfaceData! as Dictionary!
currentSSID = interfaceData["SSID"] as! String
}
}
}
return currentSSID
}
}(重要信息： CNCopySupportedInterfaces在模拟器上返回nil。)
有关Objective-c，请参阅Esad's answer here and below
+ (NSString *)GetCurrentWifiHotSpotName {
NSString *wifiName = nil;
NSArray *ifs = (__bridge_transfer id)CNCopySupportedInterfaces();
for (NSString *ifnam in ifs) {
NSDictionary *info = (__bridge_transfer id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
if (info[@"SSID"]) {
wifiName = info[@"SSID"];
}
}
return wifiName;
}iOS 9更新
从iOS 9开始，强制网络已弃用*。(source)
*在iOS 10中不再推荐使用，请参见上文。
建议您使用NEHotspotHelper (source)
你需要给苹果公司发邮件到networkextension@apple.com，并申请授权。(source)
示例代码(Not my code. See Pablo A's answer)：
for(NEHotspotNetwork *hotspotNetwork in [NEHotspotHelper supportedNetworkInterfaces]) {
NSString *ssid = hotspotNetwork.SSID;
NSString *bssid = hotspotNetwork.BSSID;
BOOL secure = hotspotNetwork.secure;
BOOL autoJoined = hotspotNetwork.autoJoined;
double signalStrength = hotspotNetwork.signalStrength;
}附注:是的，他们在iOS 9中弃用了CNCopySupportedInterfaces，并在iOS 10中改变了立场。我与一位苹果网络工程师进行了交谈，在这么多人提交雷达并在苹果开发者论坛上谈论这个问题后，他们的立场发生了逆转。
Stack Overflow用户
发布于 2013-12-30 19:51:48
易于使用的代码片段(方法)：
添加下面的method
- (NSString *)GetCurrentWifiHotSpotName { NSString *wifiName = nil；NSArray *ifs = (__bridge_transfer id)CNCopySupportedInterfaces()；for (NSString *ifs in ifs) { NSDictionary *= (__bridge_transfer id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam)；NSLog(@"info:%@"，info)；如果(info@"SSID") { wifiName = info@"SSID"；}}返回wifiName；}
https://stackoverflow.com/questions/4712535
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