Failed on [nsMutableArrayObj removeAllObjects] when rintime

Question

Hi guys.
I am facing to a little problem related NSMutableArray.
I declared NSMutableArray proprety in .h file following as :
@interface MyCustomController : UIViewController {
NSMutableArray *arrayObject;
@property (nonatomic, retain) NSMutableArray *arrayObject;
And initialized it in MyAppDelegate.m
- (void)applicationDidFinishLaunching:(UIApplication *)application {
_myCustomController = [[MyCustomController alloc] initWithNibName"MyCustomController" bundle:nil]
_myCustomController.arrayObject = [[NSMutableArray alloc] init];
I use arrayObject in NSThread. And to pass a value in NSThread like this :
MyCustomObject *obj = [[MyCustomObject alloc] init];
[obj setObjectFor:(MyCustomObject *)[arrayObject objectAtIndex:index];
//Now use only obj
When call [arrayObject removeAllObjects] on Main Thread, crashed the application.
In the console :
[Session started at 2009-11-28 17:07:43 +0800.]
objc[6611]: FREED(id): message release sent to freed object=0x5fd6e90
GNU gdb 6.3.50-20050815 (Apple version gdb-966) (Tue Mar 10 02:43:13 UTC 2009)
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This GDB was configured as "i386-apple-darwin".sharedlibrary apply-load-rules all
Attaching to process 6611.
kill
Current language: auto; currently objective-c
quit
The Debugger has exited with status 0.(gdb)
What is wrong here ?
How to fix it ?
Please help me guys.
Thanks in advance.

Answer 1

Thanks, xnav.
In order to call method that uses NSMutableArray with time interval, I am using the NSThread.
I am thinking about to use NSTimer instead of NSThread.
Because NSTimer is not a separate thread.
Can NSTimer work as a main thread ?
What do you think about it?
Thanks in advance.