我想知道如何正确释放一个单元格并修复我的内存泄漏。如果数字单元格数字变高，还会询问内存泄漏是否会导致滚动崩溃？
这是我的单元格泄漏来自任何建议吗？
NSString *identifier = @"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
if (cell == nil) {
}
//add subtitle
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:@"cell"];
/*
//Here it adds a nice shadow to the table view but will crash on rotation and send a
wierd dump to ApplistViewController !!!????
tableView.layer.shadowColor = [[UIColor blackColor] CGColor];
tableView.layer.shadowOffset = CGSizeMake(1.0f, 1.0f);
tableView.layer.shadowRadius = 8.0f;
tableView.layer.shadowOpacity = 1.0f;
*/
[cell.textLabel setNumberOfLines:1];
[cell.textLabel setText:[(Tweet*)[authors objectAtIndex:indexPath.row] author]];
[cell.detailTextLabel setText:[(Tweet*)[tweets objectAtIndex:indexPath.row] tweet]];
[cell.detailTextLabel setNumberOfLines:10];
[cell.textLabel setTextColor:[UIColor darkGrayColor]];
[cell.textLabel setShadowColor:[UIColor whiteColor]];
[cell.textLabel setShadowOffset:CGSizeMake(0.5, 0.5)];
[cell.detailTextLabel setTextColor:[UIColor blackColor]];
//[cell.detailTextLabel setText:[(Tweet*)[retweetCount objectAtIndex:indexPath.row]
reTweetCount]];
[cell.textLabel setUserInteractionEnabled:YES];
[cell.contentView setMultipleTouchEnabled:YES];
// cell.text = [[NSString alloc] initWithFormat:@"Cell :%i", indexPath.row];
NSURL *url = [NSURL URLWithString:[(Tweet*)[avatarsURL
objectAtIndex:indexPath.row]avatarURL]];
NSData *data = [NSData dataWithContentsOfURL:url];
// NSLog(@"http://a0.twimg.com/profile_images/1268205919/iDD_normal.png");
UIImage *tableImage = [[UIImage alloc] initWithData:data];
[cell.imageView setImage:tableImage];
cell.imageView.image = tableImage ;
CGSize imageSize = CGSizeMake(45,45);
UIGraphicsBeginImageContext(imageSize);
CGRect imageRect = CGRectMake(0.2, 0.1, imageSize.width, imageSize.height);
[tableImage drawInRect:imageRect];
cell.imageView.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
//PlaceMent avatars! would like to use a if statment to place this image in the cell if
before it retrives the avatar just like the method above for the profile!
/*
NSString *avatar = [[NSBundle mainBundle] pathForResource:@"avatar" ofType:@"png"];
UIImage *setAvatar = [[UIImage alloc] initWithContentsOfFile:avatar];
//now place avatar in cell
cell.imageView.image = setAvatar;
*/
//add gradient to cell
UIImage *gradient = [UIImage imageNamed:@"gradientcell2.png"];
UIImageView *cellimage = [[UIImageView alloc] initWithImage:gradient];
cellimage.contentMode = UIViewContentModeScaleToFill;
cell.backgroundView = cellimage;
[cellimage release];
UIImage *selectedGradient = [UIImage imageNamed:@"selectedcell.png"];
UIImageView *selectedCell = [[UIImageView alloc] initWithImage:selectedGradient];
selectedCell.contentMode = UIViewContentModeScaleToFill;
cell.selectedBackgroundView = selectedCell;
//subtitle if needed !! Also change UITableViewStlyle from default to Subtitle up 7
lines
// cell.detailTextLabel.text = @"subtile";
//yeah another warning within the tableview whats new =P
[tableView setBackgroundColor:[UIColor clearColor]];
return cell;
[cell autorelease];
}
所有泄漏都是固定的!!!!谢谢，但为什么在添加计数整数时会崩溃？
有什么建议吗？
2011-06-01 18:24:55.663 ThemeCatcher[4641:207] *** Terminating app due to uncaught
exception 'NSRangeException', reason: '*** -[NSMutableArray objectAtIndex:]: index 16
beyond bounds [0 .. 15]'
*** Call stack at first throw:
(
0 CoreFoundation 0x014dcbe9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x016315c2 objc_exception_throw + 47
2 CoreFoundation 0x014d26e5 -[__NSArrayM objectAtIndex:] +
261
3 ThemeCatcher 0x00025833 -[TwitterVeiwController
tableView:cellForRowAtIndexPath:] + 531
4 UIKit 0x007bb7fa -
[UITableView(UITableViewInternal) _createPreparedCellForGlobalRow:withIndexPath:] + 634
5 UIKit 0x007b177f -
[UITableView(UITableViewInternal) _createPreparedCellForGlobalRow:] + 75
6 UIKit 0x007c6450 -
[UITableView(_UITableViewPrivate) _updateVisibleCellsNow:] + 1561
7 UIKit 0x007be538 -[UITableView layoutSubviews] +
242
8 QuartzCore 0x00460451 -[CALayer layoutSublayers] + 181
9 QuartzCore 0x0046017c CALayerLayoutIfNeeded + 220
10 QuartzCore 0x0045937c
_ZN2CA7Context18commit_transactionEPNS_11TransactionE + 310
11 QuartzCore 0x004590d0 _ZN2CA11Transaction6commitEv +
292
12 QuartzCore 0x004897d5
_ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 99
13 CoreFoundation 0x014bdfbb
__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 27
14 CoreFoundation 0x014530e7 __CFRunLoopDoObservers + 295
15 CoreFoundation 0x0141bbd7 __CFRunLoopRun + 1575
16 CoreFoundation 0x0141b240 CFRunLoopRunSpecific + 208
17 CoreFoundation 0x0141b161 CFRunLoopRunInMode + 97
18 GraphicsServices 0x01efa268 GSEventRunModal + 217
19 GraphicsServices 0x01efa32d GSEventRun + 115
20 UIKit 0x0075642e UIApplicationMain + 1160
21 ThemeCatcher 0x000021c9 main + 121
22 ThemeCatcher 0x00002145 start + 53
23 ??? 0x00000001 0x0 + 1
)
terminate called after throwing an instance of 'NSException'
Current language: auto; currently objective-c
(gdb)
答案 0 :(得分：0)
cell对象需要在此自动发布 - cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:@"cell"];，此行必须位于if ( cell == nil ) { //here }内。tableImage但不发布它。selectedCell也未发布。autorelease。这不会发生，如果是可重复使用的单元格，它会发送一条额外的release消息，导致您的应用崩溃。您的评论中似乎有更多问题我选择不包括在内。尝试使用Leaks应用程序检查内存泄漏。
答案 1 :(得分：0)
当你在cellForRowAtIndex中编写下面的代码时，只需自动释放它。你的问题解决了。
static NSString *cellIdentifier = @"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if(cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellSeparatorStyleSingleLine reuseIdentifier:cellIdentifier] autorelease];
}