Notes

//
// ViewController.m
// _LoginApp
//
// Created by STU 26 on 5/16/17.
// Copyright (c) 2017 STU 26. All rights reserved.
//

#import "ViewController.h"
#import "HomeViewController.h"

@interface ViewController ()
@property (strong, nonatomic) IBOutlet UITextField *txtUsername;
@property (strong, nonatomic) IBOutlet UITextField *txtPassword;

@end

@implementation ViewController

-(NSString *) login:(NSString *) username:(NSString *) password{

NSString *urlString=[NSString stringWithFormat:@"http://etikbiri.net/membership.svc/loginasjson?username=%@&password=%@",username,password];
NSURL *url=[NSURL URLWithString:urlString];
NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:url];
[request setTimeoutInterval:30.0f];
[request setHTTPMethod:@"GET"];
NSURLResponse *response=nil;
NSError *error=nil;
NSData *data=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString *returndata=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
return returndata;




}


-(void) displayTextIsRequired{
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:nil message:@"Lütfen kulanıcı adı ve şifre giriniz!" delegate:nil cancelButtonTitle:nil otherButtonTitles:@"Ok", nil];
[alert show];
}

-(void) userNotExists{
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:nil message:@"Kullanıcı Bulunamadı!" delegate:nil cancelButtonTitle:nil otherButtonTitles:@"Ok", nil];
[alert show];
}
-(void) errorMessage{
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:nil message:@"Hata !" delegate:nil cancelButtonTitle:nil otherButtonTitles:@"Ok", nil];
[alert show];
}




-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{

if ([segue.identifier isEqualToString:@"pushHomeViewController"]) {
HomeViewController *nextController=segue.destinationViewController;
[nextController setText:self.txtUsername.text];
}
}


-(BOOL) shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender{
if ([identifier isEqualToString:@"pushHomeViewController"]) {
if ([self.txtPassword.text length]==0 || [self.txtUsername.text length]==0) {
[self displayTextIsRequired];
return NO;
}else{

NSString *returnData=[self login:self.txtUsername.text : self.txtPassword.text];
NSLog(@"%@",returnData);
if ([returnData isEqualToString:@"1"])
{
return YES;
}
else if ([returnData isEqualToString:@"0"])
{
[self userNotExists];
return NO;
}
else if ([returnData isEqualToString:@"-1"])
{
[self errorMessage];
return NO;
}
}
}
return YES;
}

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end