php - How to go about an iPhone login page -

i wondering how start iphone login page. have tried using sql/php , connecting xcode, have had no success. best way it?

cribbing off a tutorial:

// loginexampleviewcontroller.h #import <uikit/uikit.h>  @class loginexampleviewcontroller;  @interface loginexampleappdelegate : nsobject <uiapplicationdelegate> {     uiwindow *window;     loginexampleviewcontroller *viewcontroller; }  @property (nonatomic, retain) iboutlet uiwindow *window; @property (nonatomic, retain) iboutlet loginexampleviewcontroller *viewcontroller;  @end  // loginexampleviewcontroller.h  #import <uikit/uikit.h>  @interface loginexampleviewcontroller : uiviewcontroller {   iboutlet uitextfield *unamefield;  iboutlet uitextfield *passwordfield;  iboutlet uibutton *loginbutton;   nsmutabledata *receivedata;  }  @property (nonatomic, retain) uitextfield *unamefield; @property (nonatomic, retain) uitextfield *passwordfield; @property (nonatomic, retain) uibutton *loginbutton; @property (nonatomic, retain) nsmutabledata *receivedata;  -(ibaction)dologin: (id)sender;   @end  // loginexampleviewcontroller.m #import "loginexampleviewcontroller.h"  @implementation loginexampleviewcontroller   @synthesize unamefield; @synthesize passwordfield; @synthesize loginbutton; @synthesize receivedata;  // implement viewdidload additional setup after loading view, typically nib. - (void)viewdidload {   [super viewdidload];  }  //implement ibaction method -(ibaction) dologin: (id) sender {    nsstring *uname= unamefield.text;  nsstring *password= passwordfield.text;      nsurl *theurl = [nsurl urlwithstring:[nsstring stringwithformat:@"http://localhost:8888/powerplay/insert2.php?name=%@&password=%@",uname, password]]; //here place url link   nsurlrequest *req = [nsurlrequest requestwithurl:theurl];  nsurlconnection *connection = [nsurlconnection connectionwithrequest:req delegate:self];  if (connection) {   nslog(@"connection successful");  }  else {   nslog(@"failed");  } }   // implement connection delegate  -(void) connection:(nsurlconnection *)connection didreceivedata:(nsdata *)data{  } -(void) connection:(nsurlconnection *)connection didreceiveresponse:(nsurlresponse *)response{   [receivedata setlength:0]; // nsurl *theurl=[response url]; }  -(void) connectiondidfinishloading:(nsurlconnection *)connection{  nslog(@"success",[receivedata length]);  [connection release];  [receivedata release];  }    // implement textfield delegate  -(bool)textfieldshouldreturn:(uitextfield *)textfield{  [textfield resignfirstresponder];  return yes; }   // implement touchevent   -(void)touchesbegan :(nsset *)touches withevent:(uievent *)event {   [super touchesbegan:touches withevent:event];  }   - (void)didreceivememorywarning {     // releases view if doesn't have superview.     [super didreceivememorywarning];      // release cached data, images, etc aren't in use. }  - (void)viewdidunload {     [super viewdidunload];     // release retained subviews of main view.     // e.g. self.myoutlet = nil; }   - (void)dealloc {  [unamefield release];  [passwordfield release];     [super dealloc]; }     @end 

worked me, if have problems, leave comment.