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;