滚动UITableview时出现以下错误。
EXC_BAD_ACCESS， - [CFString retain]：发送到解除分配的实例的消息
我怎样才能找到解除分配的实例...？ 这是我的noOfRowsinsection代码
for(int i=0;i<size;i++)
{
NSString *CellIdentifier1;
if(universalApp==2)
{
NSAutoreleasePool *pool=[[NSAutoreleasePool alloc]init];
CellIdentifier1 = @"CustomThumbImageTableCell_iphone";
cell = [[[CustomThumbImageTableCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier1] autorelease];
//NSLog(@">>>>> Creating image >>>>>>>>");
//cell.thumbImageView = [[CustomImageView alloc] initWithFrame:CGRectMake(4, 4, 83, 101)];
cell.thumbImageView = [[[CustomImageView alloc] initWithFrame:CGRectMake(4, 4, 83, 101)] autorelease];
[imgViewArray addObject:cell.thumbImageView];
[cell.thumbImageView release];
[pool release];
}
这是我的cellforRow代码
enter code hereif(universalApp==2)
{
NSLog(@"iphone cell>>>>>>>>>>>>>>>>>>>>>>");
CustomThumbImageTableCell *cell = nil;
@try
{
static NSString *CellIdentifier = @"CustomThumbImageTableCell_iphone";
int currentRow = [indexPath row] ;//+ skippedItems;
//NSLog(@">>>>>>>>>>>>Current Table row = %d, %d, %d", loadedCellArray.count, currentRow, [Table numberOfRowsInSection:0]);
/*if(loadedCellArray.count > currentRow + 1 && [loadedCellArray objectAtIndex:(currentRow)] != nil)
{
NSLog(@"Image updated = %d", ( currentRow));
cell = (CustomThumbImageTableCell_iphone *) [loadedCellArray objectAtIndex:(currentRow )];
}
else
{*/
/*if(loadedCellArray.count > currentRow + 1 )// && [loadedCellArray objectAtIndex:(currentRow)] != nil)
// if( [loadedCellArray objectAtIndex:(currentRow)] != nil)
{
//NSLog(@"Image updated = %d", ( currentRow));
cell = (CustomThumbImageTableCell_iphone *) [loadedCellArray objectAtIndex:([indexPath row] )];
if(!isScrollingUp)
{
//scrollCount++;
[loadedCellArray removeLastObject];
}
isScrollingUp = YES;
}
else*/
{
static NSString *CellIdentifier = @"CustomThumbImageTableCell_iphone";
static NSString *CellIdentifier1 = @"CustomThumbImageTableCell_iphone";
//UITableViewCell *cell;
if(cell==nil)
{
cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
cell = [[[CustomThumbImageTableCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
}
else
{
cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier1];
cell = [[[CustomThumbImageTableCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier1] autorelease];
}
cell.selectionStyle = UITableViewCellSelectionStyleNone;
NSLog(@">>>>>>>>>..... %d, %d, %@", imgViewArray.count, indexPath.row, (((int)imgViewArray.count- 1) < (int)indexPath.row) ? @"YES" : @"NO");
/*if(((int)imgViewArray.count- 1) < (int)indexPath.row)
{
// NSLog(@">>>>> Creating image >>>>>>>>");
cell.thumbImageView = [[CustomImageView alloc] initWithFrame:CGRectMake(4, 4, 83, 101)];
[imgViewArray addObject:cell.thumbImageView];
}
else {
cell.thumbImageView = (CustomImageView *) [imgViewArray objectAtIndex:indexPath.row];
}*/
//NSLog(@"img array = %@,%d",imgViewArray,imgViewArray.count);
cell.thumbImageView =[imgViewArray objectAtIndex:indexPath.row];
cell.thumbImageView.contentMode = UIViewContentModeScaleAspectFit;
[cell.contentView addSubview:cell.thumbImageView];
cell.thumbImageView.index = (int)indexPath.row;
@try
{
{
BOOL isFound = NO;
do
{
@try {
NSArray *array1 = [contentString componentsSeparatedByString:@"@@#"];
NSArray *array2 = [[array1 objectAtIndex:currentRow ] componentsSeparatedByString:@"##"];
NSString *str = [NSString stringWithFormat:@"%@", [array2 objectAtIndex:0]];
str = [str stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
UILabel *name = [[UILabel alloc] initWithFrame:CGRectMake(104, 6, 141, 96)];
name.textAlignment = UITextAlignmentCenter;
name.font = [UIFont fontWithName:@"Arial" size:17.0];
name.numberOfLines = 3;
name.backgroundColor = [UIColor clearColor];
name.textColor = [UIColor whiteColor];
cell.catalogName = name;
[cell.catalogName setText:[NSString stringWithFormat:@"%@", str]];
[cell.contentView addSubview:cell.catalogName];
//[name release];
name = [[UILabel alloc] initWithFrame:CGRectMake(107, 89, 193, 21)];//107,89,193
name.textAlignment = UITextAlignmentCenter;
name.font = [UIFont fontWithName:@"Arial" size:13.0];
name.textColor = [UIColor whiteColor];
name.numberOfLines = 3;
name.backgroundColor = [UIColor clearColor];
name.alpha = 0.26;
cell.pageNo = name;
[cell.contentView addSubview:cell.pageNo];
//[name release];
if((searchId != 2 && (isLineNameSearchEnabled == 0)) || searchInCatalogFlag == 1)
//cell Page No//pageNoLabel
//NSLog(@"cell for row.......");
[cell.pageNo setText:[NSString stringWithFormat:@"Page No: %@", [array2 objectAtIndex:(array2.count - 2)]]];
{
}
NSLog(@" thumb image = %@",[NSString stringWithFormat:@"%@%@", baseURL, [array2 objectAtIndex:1]]);
//[cell.thumbImageView setImageURL:@"http://www.zoomcatalog.com/sites/default/files/catalogs/27705_Abex2010/images/thumbnails/Thumb-1.jpg"];
[cell.thumbImageView setImageURL:[NSString stringWithFormat:@"%@%@", baseURL, [array2 objectAtIndex:1]]];
[NSThread detachNewThreadSelector:@selector(initThread) toTarget:cell.thumbImageView withObject:nil];
[cell.thumbImageView setPageNo:((searchId == 2 || (isLineNameSearchEnabled && searchInCatalogFlag == 0)) ? 0 : (int)currentRow)];
UIImageView *img = [[UIImageView alloc] initWithFrame:CGRectMake(264, 33, 36, 34)];
img.contentMode = UIViewContentModeScaleToFill;
[img setImage:cellArrow];
[cell.contentView addSubview:img];
[img release];
[cell.catalogName release];
//>>>> [cell.pageNoLabel release];
[cell.thumbImageView release];
isFound = YES;
}
@catch (NSException * e) {
//skippedItems++;
currentRow = [indexPath row] + 1;
}
}
while (!isFound);
/*if(isScrollingUp)
{
//scrollCount++;
[loadedCellArray removeLastObject];
}
isScrollingUp = NO;
currentRow =indexPath.row;
// cell = (CustomThumbImageTableCell_iphone *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
//cell = (CustomThumbImageTableCell_iphone *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"CustomThumbImageTableCell_iphone" owner:self options:nil];
//cell = (CustomThumbImageTableCell_iphone *) [loadedCellArray objectAtIndex:(currentRow )];
cell = self.cell;
self.cell = nil;
}
NSLog(@"Image loaded from source= %d,", ( currentRow));
//if(loadedCellArray.count > currentRow + 1)
// NSLog(@"Image loaded from source cell array ref= %@", [loadedCellArray objectAtIndex:(currentRow)]);
/*if(currentRow == ([Table numberOfRowsInSection:0] - 1))
{
cell.catalogName.text = @"50 More";
NSLog(@">>>>>>>>>>>>>>>>>>>>> End cell....");
return cell;
}
/////
// if(true)
// return cell;
@try
{
{
BOOL isFound = NO;
do
{
@try {
NSArray *array1 = [contentString componentsSeparatedByString:@"@@#"];
NSArray *array2 = [[array1 objectAtIndex:currentRow] componentsSeparatedByString:@"##"];
NSString *str = [NSString stringWithFormat:@"%@", [array2 objectAtIndex:0]];
str = [str stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
// NSLog(@"&&&&&&&&&&&&&&&&& %@", str);
[cell.catalogName setText:[NSString stringWithFormat:@"%@", str]];
if((searchId != 2 && (isLineNameSearchEnabled == 0)) || searchInCatalogFlag == 1)
[cell.pageNo setText:[NSString stringWithFormat:@"Page No: %@", [array2 objectAtIndex:(array2.count - 2)]]];
// NSLog(@"Background color has been set....%d", i);
//NSLog(@")
//NSLog(@"Catalog %d = %@", currentRow, [array1 objectAtIndex:currentRow]);
// NSLog(@"Image URL = %@", [NSString stringWithFormat:@"%@%@", baseURL, [array2 objectAtIndex:1]]);
[cell.thumbImageView setImageURL:[NSString stringWithFormat:@"%@%@", baseURL, [array2 objectAtIndex:1]]];
//[cell.thumbImageView setContentString:contentString];
//if(searchId == 2)
// [cell.thumbImageView setContentString:[NSString stringWithFormat:@"%@", [array2 objectAtIndex:(array2.count - (isLineNameSearch ? 2 : 2))]]];
[cell.thumbImageView performSelectorOnMainThread:@selector(initThread) withObject:nil waitUntilDone:NO];
[cell.thumbImageView setPageNo:(searchId == 2 ? @"0" : [indexPath row])];
isFound = YES;
}
@catch (NSException * e) {
//skippedItems++;
currentRow = [indexPath row] + 1;
}
*/
// }
// while(!isFound);// && currentRow < [Table numberOfRowsInSection:0]);
//[imgViewArray addObject:cell.thumbImageView];
// [imgViewArray retain];
//[label setTextColor:[UIColor blackColor]];
//[label setTextAlignment:UITextAlignmentCenter];
/* UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(7 + ((i % 3) * (96 + 8)) , 9 + ((i / 3) * (140 + 10)), 98, 142)];
[label setBackgroundColor:[UIColor grayColor]];
[scrollView addSubview:label];
[imgViewArray addObject:imgView];
[scrollView addSubview:imgView];
if(i % 3 == 0)
{
[scrollView setContentSize:CGSizeMake(scrollView.contentSize.width, scrollView.contentSize.height + (140 + 10))];
}*/
}
//[imgViewArray retain];
// [cellArray retain];
}
答案 0 :(得分：5)
当您遇到内存管理问题时，您可以执行以下操作：
[_NSZombie release]插入断点。这应该有望打破导致问题的界限。根据您的代码，以下行可能是罪魁祸首。
[cell.thumbImageView release]; // NOT GOOD
同样在你的其他代码中：
[cell.thumbImageView release]; // NOT GOOD
[cell.catalogName release]; // NOT GOOD
您将自动释放的对象设置为单元格的thumbImageView和catalogName属性，但您仍在尝试释放它。这不是Cocoa内存管理的工作原理。您没有拥有 cell.thumbImageView或cell.catalogName，因此您不应该发布它们。
答案 1 :(得分：2)
当您尝试访问已释放的对象时，会发生此问题。在您访问它之前，可能是您的字符串已发布。