shouldPerformSegueWithIdentifier issue - ios

Question

I tried too much to solve my bellow issue but i am failed.Please help me to solve this issue. I have login view and after validating id and password i am pushing it to next view controller.Please check bellow image.
Issue - When Id and Password is correct it's pushing to next view controller but after 2 clicks on login button.
Code -
ServiceManager.m
-(void)initGetAppServiceRequestWithUrl:(NSString *)baseUrl onCompletion:
(ServiceCompletionHandler)handler
{
NSString *fullUrl = [NSString stringWithFormat:#"%#",[baseUrl
stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL
URLWithString:fullUrl]];
[NSURLConnection sendAsynchronousRequest:(NSURLRequest *)request
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response,NSData *data,NSError *error)
{
if (error) {
handler(nil,error);
// NSLog(#"error = %#",error);
}
else
{ handler(data, nil);
// NSLog(#"data = %#",data);
}
}];
}
JSONResponseHandler.m
+(void)handleResponseData:(NSData *)responseData onCompletion:(JSONHandler)handler
{
if (responseData) {
NSError *jsonParseError;
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:responseData
options:kNilOptions error:&jsonParseError];
if (!json) {
handler(nil , jsonParseError);
}
else
{
handler (json , nil);
}
}
}
ASKevrServiceManager.m
-(void)login:(Login *)login completionHandler:(ServiceCompletionHandler)handler
{
NSString *loginUrl = [NSString
stringWithFormat:#"http://249development.us/johnsan/askever/login.php?
login=%#&password=%#",login.emailAddr , login.password];
[self initGetAppServiceRequestWithUrl:loginUrl onCompletion:^(id object, NSError
*error)
{
handler(object , error);
}
];
}
ASKevrOperationManager.m
+(void)login:(Login *)login handler:(OperationHandler)handler
{
ASKevrServiceManager *serviceManager = [[ASKevrServiceManager alloc]init];
[serviceManager login:login completionHandler:^(id object, NSError *error)
{
[JSONResponseHandler handleResponseData:object onCompletion:^(NSDictionary
*json , NSError *jsonError)
{
if(json)
{
handler(json , nil , YES);
}
else
{
handler(nil , jsonError , NO);
}
}];
}];
}
LoginViewController.m
-(BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender
{
if ([identifier isEqualToString:#"pushTab"])
{
if ([emailTxt.text isEqualToString:#""] || [passwordTxt.text
isEqualToString:#""])
{
[self showAlertWithMessage:#"Please write your id or password"];
return NO;
}
else
{
Login *loginModel = [[Login alloc]init];
loginModel.emailAddr =emailTxt.text;
loginModel.password = passwordTxt.text;
[ASKevrOperationManager login:loginModel handler:^(id object , NSError *error ,
BOOL success)
{
if (success)
{
NSLog(#"object =%#",object);
NSDictionary *arr = [object objectForKey:#"response"];
str = [arr objectForKey:#"flag"];
//check for error
NSDictionary *toDict = [object objectForKey:#"response"];
currentUserId = [toDict objectForKey:#"c_id"];
NSLog(#"currentUserId = %#",currentUserId);
}
else
{
[self showAlertWithMessage:#"Wrong Id or Password."];
}
}];
NSLog(#"str = %#",str);
if ([str isEqualToString:#"1"])
{
// [self showAlertWithMessage:#"Wrong Id or Password."];
return YES;
}
}
}
return NO;
}

Answer 1

When pressing login button do run the code
if (![emailTxt.text isEqualToString:#""] &&
![passwordTxt.text isEqualToString:#""]){
Login *loginModel = [[Login alloc]init];
loginModel.emailAddr =emailTxt.text;
loginModel.password = passwordTxt.text;
[ASKevrOperationManager login:loginModel handler:^(id object , NSError *error ,
BOOL success)
{
if (success){
NSLog(#"object =%#",object);
NSDictionary *arr = [object objectForKey:#"response"];
str = [arr objectForKey:#"flag"];
//check for error
NSDictionary *toDict = [object objectForKey:#"response"];
currentUserId = [toDict objectForKey:#"c_id"];
NSLog(#"currentUserId = %#",currentUserId);
//perform the segue only when succesful
[self performSegueWithIdentifier:#"yourSegue" sender:sender];
}else{
[self showAlertWithMessage:#"Wrong Id or Password."];
}
}];
}else {
[self showAlertWithMessage:#"Please write your id or password"];
}
Keep your shouldPerformSegueWithIdentifier simple
-(BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender
{
if ([identifier isEqualToString:#"pushTab"])
{
//don't put logic here
//put code here only if you need to pass data
//to the next screen
return YES:
}
return NO;
}