about json method calling

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aoa i am making an f..
app of finance system. i had maked web method login name in c# json wcf.
but whenever i call this methos in ios it is getting a thread...
my code for login form is:

C#

(IBAction)yes:(id)sender

<pre lang="cs">UIAlertView *msgbox=[[UIAlertView alloc]initWithTitle:@&quot;Warrning&quot; message:nil delegate:self cancelButtonTitle:@&quot;Ok&quot; otherButtonTitles:nil, nil];
    if ([usernametextbox.text length]&gt;0)
    {
        if ([passwordtextbox.text length]&gt;0)
        {
            NSMutableString *ms=[[NSMutableString alloc]initWithFormat:@&quot;http://192.168.1.2:8082/ipad/ipadservice.svc/login?UserName=%@&amp;Pasword=%@&quot;,usernametextbox.text,passwordtextbox.text];
            NSURL *serviceurl=[[NSURL alloc] initWithString:ms];
            NSError *error=nil;
            NSData *data=[NSData dataWithContentsOfURL:serviceurl options:NSDataReadingUncached error:&amp;error];
            NSMutableDictionary *dic=[[NSMutableDictionary alloc]init];
            NSString *jsondata=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
            SBJSON *parsedata=[[SBJSON alloc] init];
            dic=[parsedata objectWithString:jsondata error:nil];
            if([dic count]&gt;0)
            {
                NSMutableString *st=[[NSMutableString alloc]initWithString:[dic objectForKey:@&quot;loginResult&quot;]];
                if ([st isEqualToString:@&quot;YES&quot;])
                {
                    UIAlertView * alert=[[UIAlertView alloc] initWithTitle:@&quot;accept&quot; message:@&quot;correct username&quot; delegate:nil cancelButtonTitle:@&quot;OK&quot; otherButtonTitles:nil, nil];
                    [alert show];


                }
                else
                {
                    UIAlertView * alert=[[UIAlertView alloc] initWithTitle:@&quot;Error&quot; message:@&quot;Invalid UserName and Password&quot; delegate:nil cancelButtonTitle:@&quot;OK&quot; otherButtonTitles:nil, nil];
                    [alert show];

                }
            }
        }
        else
        {
            msgbox.message=@&quot;Please Enter Password...&quot;;
            [msgbox show];
        }
    }
    else
    {
        msgbox.message=@&quot;Please Enter Username...&quot;;
        [msgbox show];
    }
}</pre>

i am getting error on

if ([st isEqualToString:@&quot;YES&quot;])
{

and application will terminate on this line and the thread is

C#

#import <UIKit/UIKit.h>

#import "AppDelegate.h"

int main(int argc, char *argv[])
{
    @autoreleasepool {
        return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
    }
}

signal sigabrt..
how can i overcome this iisue?

Posted 10-Jun-14 3:03am

Member 10690757

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KarstenK · Answer 1 · 2014-06-10T06:11:00

Solution 1

it is the "normal" behavior if one of both isnt a valid string. check the code path of creating st in a more detailed fashion.

C#

SBJSON *parsedata=[[SBJSON alloc] init];
dic=[parsedata objectWithString:jsondata error:nil]; //error check!!!
if([dic count]&gt;0)//too simple check
{
NSMutableString *st=[[NSMutableString alloc]initWithString:[dic objectForKey:@&quot;loginResult&quot;]];//here comes the problem
                
if ([st isEqualToString:@&quot;YES&quot;])

Posted 10-Jun-14 6:11am

KarstenK

Comments

Member 10690757 10-Jun-14 12:17pm

how can i remove this error?

KarstenK 11-Jun-14 11:44am

have you updated yor code? and where is the error now?

Member 10690757 11-Jun-14 11:49am

error is on
{
NSMutableString *st=[[NSMutableString alloc]initWithString:[dic objectForKey:@"loginResult"]];//here comes the problem

if ([st isEqualToString:@"YES"])
in this line

Member 10690757 10-Jun-14 12:18pm

kindly do tell

Member 10907890 5-Aug-14 4:07am

can you give nslog error like reason:

KarstenK · Answer 2 · 2014-08-04T23:03:00

Solution 2

check the dic result like that

NSString *s = [dic objectForKey:@"loginResult"];

if( s == nil )
{
 NSLog(@"ERROR: No loginResult provided");
}

consider writing clean and stable code :-O

Posted 4-Aug-14 23:03pm

KarstenK