就是这么简单:
NSString *publicIP = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"https://icanhazip.com/"] encoding:NSUTF8StringEncoding error:nil];
publicIP = [publicIP stringByTrimmingCharactersInSet:[NSCharacterSet newlineCharacterSet]]; // IP comes with a newline for some reason
+ (NSString *)externalIPAddress {
// Check if we have an internet connection then try to get the External IP Address
if (![self connectedViaWiFi] && ![self connectedVia3G]) {
// Not connected to anything, return nil
return nil;
}
// Get the external IP Address based on dynsns.org
NSError *error = nil;
NSString *theIpHtml = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"http://www.dyndns.org/cgi-bin/check_ip.cgi"]
encoding:NSUTF8StringEncoding
error:&error];
if (!error) {
NSUInteger an_Integer;
NSArray *ipItemsArray;
NSString *externalIP;
NSScanner *theScanner;
NSString *text = nil;
theScanner = [NSScanner scannerWithString:theIpHtml];
while ([theScanner isAtEnd] == NO) {
// find start of tag
[theScanner scanUpToString:@"<" intoString:NULL] ;
// find end of tag
[theScanner scanUpToString:@">" intoString:&text] ;
// replace the found tag with a space
//(you can filter multi-spaces out later if you wish)
theIpHtml = [theIpHtml stringByReplacingOccurrencesOfString:
[ NSString stringWithFormat:@"%@>", text]
withString:@" "] ;
ipItemsArray = [theIpHtml componentsSeparatedByString:@" "];
an_Integer = [ipItemsArray indexOfObject:@"Address:"];
externalIP =[ipItemsArray objectAtIndex:++an_Integer];
}
// Check that you get something back
if (externalIP == nil || externalIP.length <= 0) {
// Error, no address found
return nil;
}
// Return External IP
return externalIP;
} else {
// Error, no address found
return nil;
}
}
Source from ALSystemUtilities
感谢 @Tarek 的回答。
以下是 Swift 4 版本的代码:
func getPublicIPAddress() -> String {
var publicIP = ""
do {
try publicIP = String(contentsOf: URL(string: "https://www.bluewindsolution.com/tools/getpublicip.php")!, encoding: String.Encoding.utf8)
publicIP = publicIP.trimmingCharacters(in: CharacterSet.whitespaces)
}
catch {
print("Error: \(error)")
}
return publicIP
}
注1:要获取公共IP地址,我们必须有外部网站来返回公共IP地址。 我使用的网站是商业公司的网站,因此,只要该业务存在,它就会存在。
注2:您可以自己创建一些网站,但是苹果要求HTTPS网站才能使用此功能。
我使用ipify,并且没有任何抱怨。
NSURL *url = [NSURL URLWithString:@"https://api.ipify.org/"];
NSString *ipAddress = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];
NSLog(@"My public IP address is: %@", ipAddress);
对于我们使用Swift的人来说,这里是Andrei答案的翻译,并增加了NSURLSession以在后台运行。我使用Reachability.swift来检查网络。另外,请记得在你的info.plist
中将dyndns.org添加到NSExceptionDomains
以用于NSAppTransportSecurity
。
var ipAddress:String?
func getIPAddress() {
if reachability!.isReachable() == false {
return
}
guard let ipServiceURL = NSURL(string: "http://www.dyndns.org/cgi-bin/check_ip.cgi") else {
return
}
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithURL(ipServiceURL, completionHandler: {(data, response, error) -> Void in
if error != nil {
print(error)
return
}
let ipHTML = NSString(data: data!, encoding: NSUTF8StringEncoding) as? String
self.ipAddress = self.scanForIPAddress(ipHTML)
})
task.resume()
}
func scanForIPAddress(var ipHTML:String?) -> String? {
if ipHTML == nil {
return nil
}
var externalIPAddress:String?
var index:Int?
var ipItems:[String]?
var text:NSString?
let scanner = NSScanner(string: ipHTML!)
while scanner.atEnd == false {
scanner.scanUpToString("<", intoString: nil)
scanner.scanUpToString(">", intoString: &text)
ipHTML = ipHTML!.stringByReplacingOccurrencesOfString(String(text!) + ">", withString: " ")
ipItems = ipHTML!.componentsSeparatedByString(" ")
index = ipItems!.indexOf("Address:")
externalIPAddress = ipItems![++index!]
}
if let ip = externalIPAddress {
print("External IP Address: \(ip)")
}
return externalIPAddress
}
Alamofire.request("https://api.ipify.org").responseString { (response) in
print(response.result.value ?? "Unable to get IP")
}
我发现Andrei和Tarek的回答都很有帮助。两者都依赖于一个Web URL来查询iOS/OS X设备的“公共IP”。
然而,在一些地区,像Andrei回答中提到的那样,这种方法存在问题,因为像“http://www.dyndns.org/cgi-bin/check_ip.cgi”这样的URL被审查了。
NSString *theIpHtml = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"http://www.dyndns.org/cgi-bin/check_ip.cgi"]
encoding:NSUTF8StringEncoding
error:&error];
NSURL* externalIPCheckURL = [NSURL URLWithString: @"http://1212.ip138.com/ic.asp"];
encoding:NSUTF8StringEncoding error:nil];
NSStringEncoding encoding = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
NSString *theIpHtml = [NSString stringWithContentsOfURL: externalIPCheckURL
encoding: encoding
error: &error];
icanhazip.com
为域名的网站的长久性。 :) - CIFiltericanhazip.com
其实是Backspace公司员工创建的一个非常知名的服务,已经运行了很多年(至少7年)。想要了解更多信息,请查看此链接:icanhazip FAQ。 - Tarek