I hope someone can help me put because I've trying the whole day :( ( newly stuff )
I have a database mySQL, which contains one table "products" ( two rows : "id" and "stock" ). And I want my ios5 app to send an "id" and receive the "stock" of that product.
In my PHP code:
echo json_encode(array(
'id'=>$id,
'stock'=>$stock, ));
Which I believe sends a JSON to my app, my app receives this JSON in a function called:
- (void)requestFinished:(ASIHTTPRequest *)request
{
NSString *responseStringWEB = [request responseString];
NSLog(@"STRING:: %@
", responseStringWEB); //3
NSDictionary *responseDict = [responseStringWEB JSONValue];
NSLog(@"DICT: %@
", responseDict); //3
NSString *id_producto = [responseDict objectForKey:@"id"];
NSString *stock = [responseDict objectForKey:@"stock"];
NSLog(@"ID: %@
", id_producto); //3
NSLog(@"stock: %@", stock); //3
}
and checking the console I get:
**`STRING`::**
Connection establishedDatabase selected..
***{"id":"3","stock":"46"}***
Connection closedDesconectado
2011-12-26 18:58:57.170 CaeDeCajon[1998:16403] Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (JSON text did not start with array or object and option to allow fragments not set.) UserInfo=0x984aeb0 {NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}
2011-12-26 18:58:57.171 CaeDeCajon[1998:16403] **`DICT`**: (null)
2011-12-26 18:58:57.171 CaeDeCajon[1998:16403] **`ID`**: (null)
2011-12-26 18:58:57.171 CaeDeCajon[1998:16403] **`stock`**: (null)
The question is : I do not know what format the JSON is coming ( array, How should I parse the NSstring responseStringWEB to get those two values ( ID and STOCK ). It seems I receive them from the database but I do not reach to extract them.
HELP :) thank you ,
EDITING::
Thanks. It really Helped.
It seemed that there has had something to do with the multiple echos I used in the PHP code. Now I only have one echo, sending data in json format. It works perfectly with my database and my app: I receive the whole table ( "id" and "stock" ) of all items. Thanks.
But I have found another obstacle ( no wonder ), is that I need to change the database once the products have been sold, and as they´re not usually sold 1 by 1 must post arrays into PHP,, my intention is to POST the id and reductor(reductor represent how many products of that "id" were sold ) of the products/items affected ( array_id and array_reductor).
IOS5 CODE:
NSArray *array_id=[[NSArray alloc]initWithObjects:@"0",@"3",@"5", nil];
//with the id products;
NSArray *array_reductor=[[NSArray alloc]initWithObjects:@"10",@"5",@"40", nil];
//with the number of products sold ( so I have to decrease the previous stock number in the database by these to obtain the current stock numbers ).
NSURL *url=[[NSURL alloc]initWithString:@"http://www.haveyourapp.com/promos/"];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
[request setPostValue:array_id forKey:@"id"];
[request setPostValue:array_reductor forKey:@"reductor"];
[request setDelegate:self];
[request startAsynchronous];
MY PHP FILE:
if (isset($_POST['id'])&&isset($_POST['reductor'])) // check if data is coming {
$id = array(); // I create arrays
$reductor = array();
$id=$_POST['id']; // and store arrays in them ( At least is what I believe )
$reductor=$_POST['reductor'];
$connection = new createConnection(); //i created a new object
$connection->connectToDatabase(); // connected to the database
$connection->selectDatabase();
/////////////////////////////////////////////////////////////////////////////////////////////////////////////// Stock reduction in the items affected////////////////////////////////
$num=mysql_numrows($id);
$i=0;
$stock_anterior=array();
while ($i < $num) {
$query=" SELECT stock FROM productos WHERE id = $id[$i]";
$stock_anterior[$i] = mysql_query($query);
++$i;
}
$l=0;
$num2=mysql_numrows($id);
while ($l < $num2) {
$stock_reductor[$l] = $stock_anterior[$l] - $reductor[$l];
$query = "UPDATE productos SET stock = '$stock_reductor[$l]' WHERE id = $id[$l] ";
mysql_query($query);
++$l;
}
$connection->closeConnection();
But my code is not working, I don not know if the problem is in my app or in the PHP file ( likely ), but how can I receive those two arrays and work with them????
Thanks in advance
I spend a lot of time on stack Overflow: VERY USEFULLLLLLLL!!!!!
