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copied!<ol> <li><p>Set up a local server on your computer (eventually this is what would be hosted on a website, etc...) To do this I suggest the following:</p></li> <li><p>Download XAMPP (<a href="http://www.apachefriends.org/en/xampp-macosx.html" rel="nofollow">http://www.apachefriends.org/en/xampp-macosx.html</a>) follow instructions</p> <ul> <li><p>Install in applications</p></li> <li><p>Make htcdocs in XAMPP folder in applications read &write for all</p></li> <li>Create a new folder titled Tutorials (in htcdocs)</li> <li>Add a new php file called index.php</li> <li>Write php code (NOTE THIS IS NOT SECURE, ONLY A VERY BASIC EXAMPLE)</li> </ul></li> </ol> <p>in index.php write: //Very unsecure, but this finds the function parameter name</p> <pre><code>if(function_exists($_GET['f'])) { //If found, call the function with value as a parameter $_GET['f']($_GET['value']); } //actual function that takes in a number and finds the square of the number function getLabel($number){ //This variable response with parameter name is equal to the number times the number $response['name']=$number*$number; //Return the data to the caller (in JSON encoded format) echo json_encode($response); } </code></pre> <p>-Save and close your index.php file</p> <ol> <li>In Xcode create a new project, set it up with a text label that will display the result on the screen (very simple google a tutorial if you don't know how to do this)</li> </ol> <p>Set up the connection in Xcode</p> <p>Details and steps are explained in the .h and .m file (sorry not sure why the code portion here isn't showing as such)</p> <pre><code>//Step 1, add NSURLConnectionDataDelegate //.h @interface ViewController : UIViewController<NSURLConnectionDataDelegate> @property (strong, nonatomic) IBOutlet UILabel *answer; @end </code></pre> <p>.m</p> <pre><code>#import "ViewController.h" @interface ViewController () {//step 2 local data objects NSMutableData*webData; NSURLConnection*connection; } @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; //Step 8 call (send) the request [self getData]; // Do any additional setup after loading the view, typically from a nib. //NSDictionary*dict=[NSJSONSerialization se] } //Step 3 implement this method -(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{ [webData setLength:0]; } //Step 4 append the connection data to your object -(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{ [webData appendData:data]; } //Step 5 Process results from request (called automatically when the data arrives) -(void)connectionDidFinishLoading:(NSURLConnection *)connection{ //Main parse //Web data NSError*error; //Dictionary serialized (processed) using JSON (Way of encoding data from a web request) NSDictionary*data=[NSJSONSerialization JSONObjectWithData:webData options:0 error:&error]; //If data is nil, then print error if (data==nil) { NSLog(@"%@",error); } //Print the data NSLog(@"%@",data); //Get the numerical result from the dictionary key name NSNumber*num=[data valueForKey:@"name"]; //Convert number to string NSString*label=[num stringValue]; //Set the label to this result _answer.text=label; } //Step 7, actually initialize the request -(void)getData{ //I will break this down as if it where a generic method //Connect to the index.php file via this URL //Localhost/tutorials is the XAMPP folder on your computer //index.php is the php file //getLabel(int number){} //?f=getLabel (calling this method in the php file) //number=900 //&value=900 is the parameter NSURL*url=[NSURL URLWithString:@"http://localhost/tutorials/index.php?f=getLabel&value=900"]; //In the php file it does number*number and returns the results //URL request NSURLRequest*request=[NSURLRequest requestWithURL:url]; //Set the connection connection = [NSURLConnection connectionWithRequest:request delegate:self]; if (connection) { webData=[[NSMutableData alloc]init]; } //*****Results of this request are processed by step 5 }//Step 6, in case data connection fails -(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{ NSLog(@"fail"); } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end </code></pre>

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