代码语言：javascript复制
NSString *IP = @"0.0.0.0";
//http://61.4.185.48:81/g/（中国天气网的接口）
NSURL *url = [NSURL URLWithString:@"http://61.4.185.48:81/g/"];
NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:1.0];
NSURLResponse *response = nil;
NSError *error = nil;
NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
if (error) {
NSLog(@"Failed to get WAN IP Address!n%@", error);
} else {
NSString *responseStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
IP = responseStr;
}
NSLog(@"%@",IP);
return IP;
</pre> 
