1.獲取設備外網IP，根據淘寶網獲取，其結果與百度搜IP所獲得的結果相同。其方法為：

- (NSString *)GetIPAdderss{
    NSURL *ipURL = [NSURL URLWithString:@"http://ip.taobao.com/service/getIpInfo.php?ip=myip"];
    NSData *data = [NSData dataWithContentsOfURL:ipURL];
    NSDictionary *ipDic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
    return (ipDic[@"data"][@"ip"]?ipDic[@"data"][@"ip"]:@"0.0.0.0");
}

其獲取結果為：

image.png

2.根據搜狐網獲取外網IP地址，其方法為：

- (NSString *)getWANIPAddress{
    NSError *error;
    NSURL *ipURL = [NSURL URLWithString:@"http://pv.sohu.com/cityjson?ie=utf-8"];
    NSMutableString *ip = [NSMutableString stringWithContentsOfURL:ipURL encoding:NSUTF8StringEncoding error:&error];
    //判斷返回字符串是否為所需數據
    if ([ip hasPrefix:@"var returnCitySN = "]) {
        //對字符串進行處理，然后進行json解析
        //刪除多余字符串
        NSRange range = NSMakeRange(0, 19);
        [ip deleteCharactersInRange:range];
        NSString *nowip = [ip substringToIndex:ip.length-1];
        //將字符串轉換成二進制進行Json解析
        NSData *data = [nowip dataUsingEncoding:NSUTF8StringEncoding];
        NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
        NSLog(@"%@",dict);
        return dict[@"cip"]?dict[@"cip"]:@"0.0.0.0";
    }
    return @"0.0.0.0";
}

其結果為：

image.png