EXC_BAD_ACCESS at UITableView on IOS
- by Suprie
Hi all,
When scrolling through table, my application crash and console said it was EXC_BAD_ACCESS.
I've look everywhere, and people suggest me to use NSZombieEnabled on my executables environment variables. I've set NSZombieEnabled, NSDebugEnabled, MallocStackLogging and MallocStackLoggingNoCompact to YES on my executables.
But apparently i still can't figure out which part of my program that cause EXC_BAD_ACCESS. This is what my console said
[Session started at 2010-12-21 21:11:21 +0700.]
GNU gdb 6.3.50-20050815 (Apple version gdb-1510) (Wed Sep 22 02:45:02 UTC 2010)
Copyright 2004 Free Software Foundation, Inc.
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This GDB was configured as "x86_64-apple-darwin".sharedlibrary apply-load-rules all
Attaching to process 9335.
TwitterSearch(9335) malloc: recording malloc stacks to disk using standard recorder
TwitterSearch(9335) malloc: process 9300 no longer exists, stack logs deleted from /tmp/stack-logs.9300.TwitterSearch.suirlR.index
TwitterSearch(9335) malloc: stack logs being written into /tmp/stack- logs.9335.TwitterSearch.tQJAXk.index
2010-12-21 21:11:25.446 TwitterSearch[9335:207] View Did Load
Program received signal: “EXC_BAD_ACCESS”.
And this is when i tried to type backtrace on gdb :
Program received signal: “EXC_BAD_ACCESS”.
(gdb) backtrace
#0 0x00f20a67 in objc_msgSend ()
#1 0x0565cd80 in ?? ()
#2 0x0033b7fa in -[UITableView(UITableViewInternal) _createPreparedCellForGlobalRow:withIndexPath:] ()
#3 0x0033177f in -[UITableView(UITableViewInternal) _createPreparedCellForGlobalRow:] ()
#4 0x00346450 in -[UITableView(_UITableViewPrivate) _updateVisibleCellsNow:] ()
#5 0x0033e538 in -[UITableView layoutSubviews] ()
#6 0x01ffc451 in -[CALayer layoutSublayers] ()
#7 0x01ffc17c in CALayerLayoutIfNeeded ()
#8 0x01ff537c in CA::Context::commit_transaction ()
#9 0x01ff50d0 in CA::Transaction::commit ()
#10 0x020257d5 in CA::Transaction::observer_callback ()
#11 0x00d9ffbb in __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ ()
#12 0x00d350e7 in __CFRunLoopDoObservers ()
#13 0x00cfdbd7 in __CFRunLoopRun ()
#14 0x00cfd240 in CFRunLoopRunSpecific ()
#15 0x00cfd161 in CFRunLoopRunInMode ()
#16 0x01a73268 in GSEventRunModal ()
#17 0x01a7332d in GSEventRun ()
#18 0x002d642e in UIApplicationMain ()
#19 0x00001d4e in main (argc=1, argv=0xbfffee34) at /Users/suprie/Documents/Projects/Self/cocoa/TwitterSearch/main.m:14
I really appreciate for any clue to help me debug my application.
EDIT
this is the Header file of table
#import <UIKit/UIKit.h>
@interface TwitterTableViewController : UITableViewController {
NSMutableArray *twitters;
}
@property(nonatomic,retain) NSMutableArray *twitters;
@end
and the implementation file
#import "TwitterTableViewController.h"
@implementation TwitterTableViewController
@synthesize twitters;
#pragma mark -
#pragma mark Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Return the number of rows in the section.
return [twitters count];
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
return 90.0f;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
const NSInteger TAG_IMAGE_VIEW = 1001;
const NSInteger TAG_TWEET_VIEW = 1002;
const NSInteger TAG_FROM_VIEW = 1003;
static NSString *CellIdentifier = @"Cell";
UIImageView *imageView;
UILabel *tweet;
UILabel *from;
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
// Image
imageView = [[[[UIImageView alloc] initWithFrame:CGRectMake(5.0f, 5.0f, 60.0f, 60.0f)] autorelease] retain];
[cell.contentView addSubview:imageView];
imageView.tag = TAG_IMAGE_VIEW;
// Tweet
tweet = [[[UILabel alloc] initWithFrame:CGRectMake(105.0f, 5.0f, 200.0f, 50.0f)] autorelease];
[cell.contentView addSubview:tweet];
tweet.tag = TAG_TWEET_VIEW;
tweet.numberOfLines = 2;
tweet.font = [UIFont fontWithName:@"Helvetica" size:12];
tweet.textColor = [UIColor blackColor];
tweet.backgroundColor = [UIColor clearColor];
// From
from = [[[UILabel alloc] initWithFrame:CGRectMake(105.0f, 55.0, 200.0f, 35.0f)] autorelease];
[cell.contentView addSubview:from];
from.tag = TAG_FROM_VIEW;
from.numberOfLines = 1;
from.font = [UIFont fontWithName:@"Helvetica" size:10];
from.textColor = [UIColor blackColor];
from.backgroundColor = [UIColor clearColor];
}
// Configure the cell...
NSMutableDictionary *twitter = [twitters objectAtIndex:(NSInteger) indexPath.row];
// cell.text = [twitter objectForKey:@"text"];
tweet.text = (NSString *) [twitter objectForKey:@"text"];
tweet.hidden = NO;
from.text = (NSString *) [twitter objectForKey:@"from_user"];
from.hidden = NO;
NSString *avatar_url = (NSString *)[twitter objectForKey:@"profile_image_url"];
NSData * imageData = [[NSData alloc] initWithContentsOfURL: [NSURL URLWithString: avatar_url]];
imageView.image = [UIImage imageWithData: imageData];
imageView.hidden = NO;
return cell;
}
#pragma mark -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSMutableDictionary *twitter = [twitters objectAtIndex:(NSInteger)indexPath.row];
NSLog(@"Twit ini kepilih :%@", [twitter objectForKey:@"text"]);
}
#pragma mark -
#pragma mark Memory management
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
}
- (void)viewDidUnload {
}
- (void)dealloc {
[super dealloc];
}
@end
