“EXC_BAD_ACCESS" signal received - iphone

Question

i am beginner in iphone programming i am doing an app of photo gallery in which while scrolling the UITableView i am getting this exception in my device as Program received signal: “EXC_BAD_ACCESS”
can anyone pls help me tackle this problem...
enter cod[super viewDidLoad];
self.title=#"Back";
udf=[NSUserDefaults standardUserDefaults];
id_arr=[[NSMutableArray alloc]init];
descrip_arr=[[NSMutableArray alloc]init];
path_arr=[[NSMutableArray alloc]init];
count_arr=[[NSMutableArray alloc]init];
client = [[[ClientController alloc] init] autorelease];
r_m = [[[RequestMessage alloc]init] autorelease];
m_j = [[[Main_Json alloc]init] autorelease];
[r_m setServiceType:#"IMAGE"];
[r_m setParameter:#"sample string"];
NSString * json_string = [m_j returnJsonString:r_m:#"button"];
json_string=[json_string stringByAppendingFormat: #"\n"];
NSLog(#"Client is sending:%#", json_string);
//NSLog(json_string);
client.connect;
NSLog(#"client connecting........");
if([client isConnected])
{
NSString *flag = [client send:json_string];
if(![flag isEqualToString:#"success"])
{
NSLog(#"Before Alert_view");
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:flag delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
[alert release];
return;
}
NSString *Var=[client receiveResponse];
//NSLog(#"TEST:%#",Var);
NSString *main_str=[Var stringByReplacingOccurrencesOfString:#"!#{}&" withString:#""];
//main_str=[Var stringByReplacingOccurrencesOfString:#"{\"serviceType\":\"ALLIMAGE\",\"parameters\":[[]]}" withString:#""];
NSLog(#"Split:%#",main_str);
js=[[JsontoObject alloc]sivajiTV_response:main_str];
e1=[[Event alloc]init];
NSLog(#"TEST1:%#",[udf objectForKey:#"id_value"]);
NSLog(#"TEST2:%#",[udf objectForKey:#"des_value"]);
NSLog(#"TEST3:%#",[udf objectForKey:#"path_value"]);
NSLog(#"TEST4:%#",[udf objectForKey:#"count_value"]);
id_arr=[[udf objectForKey:#"id_value"] componentsSeparatedByString:#","];
NSArray *descrip_arr1 =[[udf objectForKey:#"des_value"] componentsSeparatedByString:#","];
NSArray *path_arr1=[[udf objectForKey:#"path_value"] componentsSeparatedByString:#","];
count_arr=[[udf objectForKey:#"count_value"] componentsSeparatedByString:#","];
//NSLog(#"-------------");
//NSLog(#"STRING_ID2:%#",descrip_arr1);
//NSLog(#"STRING_ID3:%#",path_arr1);
//NSLog(#"-------------");
for (int i=0; i<[descrip_arr1 count]; i++) {
NSString *temp=[NSString stringWithFormat:#"%#",[descrip_arr1 objectAtIndex:i]];
//NSLog(#"STRING_test:%#",temp);
temp=[temp stringByReplacingOccurrencesOfString:#"\"" withString:#""];
//NSLog(#"STRING_test1:%#",temp);
[descrip_arr addObject:temp];
NSString *temp1=[NSString stringWithFormat:#"%#",[path_arr1 objectAtIndex:i]];
temp1=[temp1 stringByReplacingOccurrencesOfString:#"\"" withString:#""];
[path_arr addObject:temp1];
}
NSLog(#"------------------------------------------------------------------------------");
NSLog(#"STRING_ID1:%#",id_arr);
NSLog(#"STRING_ID2:%#",descrip_arr);
NSLog(#"STRING_ID3:%#",path_arr);
NSLog(#"STRING_ID4:%#",count_arr);
NSLog(#"------------------------------------------------------------------------------");
if([main_str isEqualToString: [NSNull null]])
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:main_str delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
[alert release];
return;
}
}
else
{
UIAlertView *alert1 = [[UIAlertView alloc] initWithTitle:nil message:#"Connection not Found" delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert1 show];
[alert1 release];
}
UILabel *lblTitle=[[UILabel alloc] initWithFrame:CGRectMake(0, 0, 50, 40)];
lblTitle.backgroundColor=[UIColor clearColor];
self.navigationItem.titleView=lblTitle;
toolbar=[[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 25)];
toolbar.barStyle=UIBarStyleBlackOpaque;
[self.view addSubview:toolbar];
UILabel *mylabel = [[UILabel alloc] initWithFrame:CGRectMake(250, 2, 60, 20)];
mylabel.backgroundColor=[UIColor clearColor];
mylabel.textColor = [UIColor whiteColor];
mylabel.text = #"Gallery";
[toolbar addSubview:mylabel];
myTableView.frame=CGRectMake(0,26, 320,430);
// myTableView.backgroundView=nil;
[self.view addSubview:myTableView];
//self.myTableView.separatorColor = [UIColor clearColor];
//UITableViewController *myTableViewController = [[UITableViewController alloc] initWithTableStyle:UITableViewStyleGrouped];
// UIToolBar *myToolBar = [[UIToolBar alloc]initWithFrame:CGRectMake(0, 15, 320, 10)];
// CGRect *toolBarFrame;
// toolBarFrame = CGMakeRect (0, 440, 320, 40);
// [toolBarFrame setFrame:toolBarFrame];
// [myTableViewController.view addSubView:toolBarFrame];
//viewController.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"movies.jpg"]];
//myTableView.rowHeight=120;
[self.view addSubview:myTableView];
//tempArray = [[NSArray alloc] initWithObjects:#"Sports",#"News",#"naturals1",#"live",nil];
//titleArray = [[NSArray alloc] initWithObjects:#"SA spinners made the difference: Sammy",#"Cabinet terminates ISRO’s deal",#"Hudson River Fish Evolve Toxic ",#"Hi Today Special News?",nil];
//SBJSON *json = [SBJSON new];
// json.humanReadable = YES;
//self.tableDataList = tempArray;
//self.myTableView.backgroundColor = [UIColor clearColor];
//create new uiview with a background image
//UIImage *backgroundImage = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"movies" ofType:#"jpg"]];
//UIImageView *backgroundView = [[UIImageView alloc] initWithImage:backgroundImage];
//adjust the frame for the case of navigation or tabbars
//backgroundView.frame = CGRectMake(0, 0, 320, 460);
//add background view and send it to the back
//[self.viewController.view addSubview:backgroundView];
//[self.viewController.view sendSubviewToBack:backgroundView];
//[backgroundView release];
//UIImage *img1= [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:#"http://122.183.217.134:8080/sivajitv/photos/20101216001017.jpg"]]];
//NSLog(#"ERROR1:%#",img1);
//NSData *imageData = [[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:#"http://122.183.217.134:8080/sivajitv/photos/20101216001017.jpg"]];
//NSLog(#"ERROR12:%#",imageData);
}

Answer 1

There are so many things wrong with your code it is hard to know where to begin:
client.connect; is syntactic sugar for [client connect], however since connect is not a property (at least I hope it is not a property), you should not use the dot-notation.
The argument to isEqualToString: expects an NSString * object, not NSNull *. If you want to see whether the variable points to a string (as opposed to nil), or, if you want to make sure that the string actually contains characters, use:
if ([main_str length])
// do something
You assign a new mutable array that you own to id_arr using id_arr=[[NSMutableArray alloc]init];, however you completely overwrite this reference later with id_arr=[[udf objectForKey:#"id_value"] componentsSeparatedByString:#","];. This means that the original array that you created (and own) can no longer be referenced, and is leaked.
You never initialise the object that you allocated:
js=[[JsontoObject alloc]sivajiTV_response:main_str];
You create an Event object, but never use it or release it (this is a memory leak):
e1=[[Event alloc]init];