HTTP Post Request check in swift - php

Question

i have php file to check a value passed from swift ios, i print json data, this is the code:
<?php
$said = $_REQUEST['sa_id'];
if($said == '123456') {
$returnValue = array("said" => "true");
}else{
$returnValue = array("said" => "false");
}
echo json_encode($returnValue);
?>
Also i wrote a swift function to check the returned said value, my code is work success in second click, i want it from first click:
class ViewController: UIViewController {
var saidResult = false;
#IBOutlet var saidField: UITextField!
#IBOutlet var labelField: UILabel!
override func viewDidLoad(){
super.viewDidLoad()
}
#IBAction func checkSAID(sender: UIButton) {
if ( isValidSAID(saidField.text) == false ) {
labelField.text = "SAID is Invalid"
} else {
labelField.text = "Done"
}
}
func isValidSAID(said2Test: String) -> Bool {
let myUrl = NSURL(string: "http://*****.com/said.php");
let request = NSMutableURLRequest(URL:myUrl!);
request.HTTPMethod = "POST";
// Compose a query string
let postString = "sa_id=\(said2Test)";
request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding);
let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
(data, response, error) in
if error != nil {
println("error=\(error)")
return
}
// You can print out response object
println("response = \(response)")
// Print out response body
let responseString = NSString(data: data, encoding: NSUTF8StringEncoding)
println("responseString = \(responseString)")
//Let's convert response sent from a server side script to a NSDictionary object:
var err: NSError?
var myJSON = NSJSONSerialization.JSONObjectWithData(data, options: .MutableLeaves, error:&err) as? NSDictionary
if let parseJSON =myJSON {
// Now we can access value of First Name by its key
var saidValue = parseJSON["said"] as? String
println("saidValue: \(saidValue)")
if ((saidValue) == "true" ) {
self.saidResult = true;
}
println("saidResult: \(self.saidResult)");
}
}
task.resume()
println("saidResult: \(self.saidResult)");
if ( self.saidResult == true ){
return true
} else {
return false
}
}
}
As i say, in first click the value of saidResult is false but after that it is take the true value
How i can solve this issue, or is there another way to improve my code?

Answer 1

I think this is probably because the http request is not answered on the first click but is on the second click.
you could try replacing your checkSAID function with this.
#IBAction func checkSAID(sender: UIButton) {
let saidQueue = dispatch_queue_create("saidQueue", DISPATCH_QUEUE_CONCURRENT)
// Do the checking on a background thread.
dispatch_async(saidQueue, {
if ( isValidSAID(saidField.text) == false ) {
// As the UI updates are performed on the main queue, update the label on the main queue.
dispatch_async(dispatch_get_main_queue()) {
labelField.text = "SAID is Invalid"
})
} else {
dispatch_async(dispatch_get_main_queue()) {
labelField.text = "Done"
})
}
})
}

Answer 2

Finally, after 4 days of testing i solved my problem.
I changed isValidSAID function code:
func isValidSAID(said2Test: String) -> Bool {
var status: String = "";
let myUrl = NSURL(string: "http://*****.com/said.php?sa_id=\(said2Test)");
let data = NSData(contentsOfURL: myUrl!)
let json = NSHSONSerialization.JSONObjectWithData(data!, option: nil, error: nil) as! NSDictionary
status = (json["said"] as? String)!
println(status)
return ( status == "true" ) ? true : false
}
and solved my issue.