Xcode 10获取不到wifi 信息的问题

一般我们获取wifi信息都是通过SystemConfiguration.framework里的CaptiveNetwork 。但是升级完xcode 10 运行以前的工程发现获取不到了。不要慌，不是说方法用不了了，这是因为xcode10里添加了一个Capabilitie。需要你手动打开。如下图：

Access WiFi Infomation

打开这个你就会发现可以获取到了。

下面丢一个获取方法：

func getWiFiNetworks() -> [String] {
        var wifiNetworks = [String]()
        guard let unwrappedCFArrayInterfaces = CNCopySupportedInterfaces() else {
            print("this must be a simulator, no interfaces found")
            return wifiNetworks
        }
        guard let swiftInterfaces = (unwrappedCFArrayInterfaces as NSArray) as? [String] else {
            print("System error: did not come back as array of Strings")
            return wifiNetworks
        }
        for interface in swiftInterfaces {
            guard let unwrappedCFDictionaryForInterface = CNCopyCurrentNetworkInfo(interface as CFString) else {
                print("System error: \(interface) has no information")
                return wifiNetworks
            }
            guard let SSIDDict = (unwrappedCFDictionaryForInterface as NSDictionary) as? [String: AnyObject] else {
                print("System error: interface information is not a string-keyed dictionary")
                return wifiNetworks
            }
            for d in SSIDDict.keys {
                wifiNetworks.append(String(describing: SSIDDict[d]!))
            }
        }
        return wifiNetworks
    }