我有一个textlbabelfield，在其中我通过JSon从外部数据库获取数据。现在，我想让我的用户修改这个字段并将其发布到数据库中。但同样，它不起作用，数据库没有改变。请你复习一下我的代码：
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后功能：
@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)
}
}
}
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。插入查询是插入一个新的数据。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。
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帖子请求：
@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)
}
}