Question

我有一个textlbabelfield，我通过JSon从外部数据库中获取数据。现在，我想让我的用户修改此字段并将其发布到数据库。但同样，它不起作用，数据库没有改变。请你查一下我的代码：

PHP代码：

       <?php
/* include db.config.php */
include_once("config.php");
// Get user id
$username = isset($_POST['username']) ? mysql_real_escape_string($_POST['username']) : “”;
$data = isset($_POST['signature']) ? mysql_real_escape_string($_POST['signature']) : “”;

// get user data
mysql_query('SET NAMES "utf8"');
$sql = mysql_query("UPDATE users SET signature = '$data' WHERE username='$username'");

die;
mysql_close($conn);
/* JSON Response */

?>

Alamofire post func：

    @IBAction func Signature(sender: UIButton) {
        var signaturesave1 = self.signature
        let prefs:NSUserDefaults = NSUserDefaults.standardUserDefaults()
        var username = prefs.valueForKey("USERNAME") as NSString
        //load and parse the JSON into an array
        Alamofire.request(.POST, "http://mywebsite/app/data/jsonsavesignature.php", parameters: ["username": username, "signature":signaturesave1]).responseJSON { (request, response, data, error) in
            if (error != nil)
            {
                // got an error in getting the data, need to handle it
                println("error calling GET usersdata")
                println(error)
            }
            else {

        self.performSegueWithIdentifier("signature_to_persoinfo", sender: self)
    }

        }
}

Answer 1

如果要更新现有数据，则需要使用更新查询，而不是插入查询。插入查询是插入新数据。因此，将mysql_query("INSERT signature INTO users WHERE username='$username'");替换为mysql_query("UPDATE users SET signature = '$data' WHERE username='$username'");，其中$ data是用户的签名。

Answer 2

我得到了答案，感谢Karthikeyani的帮助，我发布了答案，与大家分享：

我的PHP脚本：

 <?php

/* include db.config.php */
include_once("config.php");
// Get user id
$username = isset($_POST['username']) ? mysql_real_escape_string($_POST['username']) : “”;
$data = isset($_POST['signature']) ? mysql_real_escape_string($_POST['signature']) : “”;

// get user data
mysql_query('SET NAMES "utf8"');
$sql = mysql_query("UPDATE users SET signature = '$data' WHERE username='$username'");

mysql_close($conn);
/* JSON Response */

?>

我的Alamofire邮寄请求：

  @IBAction func Signature(sender: UIButton) {
        var signaturesave1 = self.signature.text
        let prefs:NSUserDefaults = NSUserDefaults.standardUserDefaults()
        var username = prefs.valueForKey("USERNAME") as NSString
        let parameters =
            ["username": username, "signature":signaturesave1]

        //load and parse the JSON into an array
        Alamofire.request(.POST, "http://mywebsite.com/app/data/jsonsavesignature.php", parameters: parameters).responseJSON { (request, response, data, error) in

                 self.performSegueWithIdentifier("signature_to_persoinfo", sender: self)

        }
    }

需要你的帮助，IOS Swift Post数据给Json Alamofire

2 个答案: