EXC_BAD_ACCESS issue - iphone

Question

I am showing employee records as rows in a screen
I want the option to remove these and show a new set of records when I click a button
The structure / organization of my code is as follows :
In My controller .h
NSMutableArray *employeeScrollViewArray;
IBOutlet UIScrollView *employeeScrollViewItems;
Here I have a UIScrollView - employeeScrollViewItems - which is populated with rows shown on the UI
I also store these rows in an array - employeeScrollViewArray
Initialization and release of objects in MyController.m file is as shown:
In the method
- (void)viewDidLoad {
employeeScrollViewArray=[[NSMutableArray alloc]init];
I am releasing this mutable array in the method :
- (void)dealloc {
[employeeScrollViewArray release];
when the view loads I populate this array with objects from a user Defined class in a method :
EmployeeDetail.m file
EmployeeDetail *empDetail=[[EmployeeDetail alloc]init];
empDetail.delegate=self;
[[NSBundle mainBundle] loadNibNamed:#"EmployeeDetail" owner:empDetail options:nil];
[self.employeeScrollViewItems addSubview:empDetail.view];
[employeeScrollViewArray addObject:empDetail];
The details of the "h" file foe EmployeeDetail.h is :
#interface EmployeeDetail : UIViewController
UIView *view;
This is the "view" that is populated with data and shown on the screen
I now want to cleanup /remove these objects
So I tried things like this : ( which is then causing the exception )
int yyy = [employeeScrollViewArray count];
for(int xxx=yyy-1;xxx>=0;xxx--){
if ([[[employeeScrollViewItems subviews]objectAtIndex:xxx ]isKindOfClass:[UIView class]]) {
[[[employeeScrollViewItems subviews ]objectAtIndex:xxx] removeFromSuperview];
}
[employeeScrollViewArray removeObjectAtIndex:xxx];
}//for
This is the only way that I am able to remove these objects
If I try to remove them separately I get this error
However even after I remove the items and code passes - it still throws this error
If I remove this code then things work - but then I cannot remove these objects
Please help !

Answer 1

I don't know where the error is coming from, but I have some general advice:
You should release the object after adding it to the array.
[employeeScrollViewArray addObject:empDetail];
[empDetail release];
The array's entries will be retained by the array itself. In the cleanup method (dealloc) now just release the array: [employeeScrollViewArray release]. That will also release all contained objects.
Mostly it is not necessary to cleanup the view hierachy. However, if you want to remove all subviews of employeeScrollViewItems, I'd do this:
for (UIView* subview in [employeeScrollViewItems subviews]) {
[subview removeFromSuperview];
}