来自调试器的Ios Xcode消息：由于内存问题而终止

我有一个带有集合视图的应用程序和此集合视图中的一个单元格,可重定向到外部链接.

每当该链接打开时,应用程序在后台崩溃并提供调试器：

“Terminated due to memory issue”.

如果我只按主页按钮,应用程序继续正常工作.

if (UIDeviceOrientationIsLandscape([UIDevice currentDevice].orientation)) Portrait = NO;
else if (UIDeviceOrientationIsPortrait([UIDevice currentDevice].orientation)) Portrait = YES;
else Portrait = [self getStatusBarOrientations];

if(indexPath.row == 4 && indexPath.section == 0)
{
    NewsListCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell4"  forIndexPath:indexPath];

    if ([languageID isEqualToString:@"1025"])
    {
        cell.title.text =[NSString stringWithFormat:@"جريدة اليوم %@", [self.pdfCoverDict valueForKey:@"PdfDate"]];
        [cell.contentView setTransform:CGAffineTransformMakeScale(-1, 1)];
    } else {
        cell.title.text =[NSString stringWithFormat:@"Today's Edition %@", [self.pdfCoverDict valueForKey:@"PdfDate"]];
    }
    NSURL *imageUrl = [NSURL URLWithString:[self.pdfCoverDict valueForKey:@"CoverImage"]];
    [cell.imageView sd_setImageWithURL:imageUrl];
    cell.imageViewWidth.constant = Portrait ? 246 : 331;
    cell.imageViewHeight.constant = Portrait ? 350 : 471;
    return cell;

} else if(indexPath.row == 0) {
    NewsListCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"HeaderView" forIndexPath:indexPath];
    cell.title.text = [self.channelKeys objectAtIndex:indexPath.section];
    cell.backView.hidden = [channelID isEqualToString:@"1"] ? (indexPath.section == 0 ? YES : NO) : YES;
    if([languageID isEqualToString:@"1025"]) {
        [cell.contentView setTransform:CGAffineTransformMakeScale(-1, 1)];
    } else {
        [cell.contentView setTransform:CGAffineTransformMakeScale(-1, 1)];
        [cell.title setTransform:CGAffineTransformMakeScale(-1, 1)];
    }
    return cell;
} else {

    NSInteger row;
    if(indexPath.row != 1 && indexPath.row != 2 && indexPath.row != 3) {
        row = indexPath.row - 2;
    } else {
        row = indexPath.row - 1;
    }
    NSMutableArray * articles =  [self.channelArticles valueForKey:[self.channelKeys objectAtIndex:indexPath.section]];
     //        if(row < articles.count) {
    NSString *articleImage = [[articles objectAtIndex:row] valueForKey:@"ArticleMedia"];
    NSString *cellIdentifier;
    NSString *articleLangID = [NSString stringWithFormat:@"%@", [[articles objectAtIndex:row] valueForKey:@"LanguageID"]];

    if(indexPath.section == 0) {
        switch (indexPath.row)
        {
            case 1:
                if(![articleImage isEqualToString:@""]) cellIdentifier = @"Cell1";
                else cellIdentifier = @"CellNoImg";
                break;
            case 2:
                if(![articleImage isEqualToString:@""]) cellIdentifier = @"Cell2";
                else cellIdentifier = @"CellNoImg";
                break;
            case 3:
                if(![articleImage isEqualToString:@""]) cellIdentifier = @"Cell3";
                else cellIdentifier = @"CellNoImg";
                break;
            case 5:
                if(![articleImage isEqualToString:@""]) cellIdentifier = @"Cell5";
                else cellIdentifier = @"CellNoImg";
                break;
            case 6:
                if(![articleImage isEqualToString:@""]) cellIdentifier = @"Cell5";
                else cellIdentifier = @"CellNoImg";
                break;
            default:
                if(![articleImage isEqualToString:@""]) {
                    if([channelID isEqualToString:@"1"]) cellIdentifier = @"Cell6";
                    else cellIdentifier = @"Cell5";
                } else {
                    cellIdentifier = @"CellNoImg";
                }
                break;
        }
    } else {
        if(![articleImage isEqualToString:@""]) cellIdentifier = @"Cell5";
        else cellIdentifier = @"CellNoImg";
    }


    NewsListCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:cellIdentifier forIndexPath:indexPath];

    if([[[articles objectAtIndex:row] valueForKey:@"LabelName"] isEqualToString:@""]) {
        cell.labelNameHeight.constant = 0;
    } else {
        cell.labelNameHeight.constant = 21;
    }
    cell.labelName.text = [[articles objectAtIndex:row] valueForKey:@"LabelName"];

    cell.title.text = [[articles objectAtIndex:row] valueForKey:@"MainHeadline"];

    if(indexPath.row == 3 && indexPath.section == 0) {
        if(![articleImage isEqualToString:@""]) cell.titleHeight.constant = [self lineCountForLabel:cell.title labelWidth:cell.frame.size.width - Portrait ? 254 : 337] * 35;
        else cell.titleHeight.constant = [self lineCountForLabel:cell.title labelWidth:cell.frame.size.width - 10] * 35;
    } else {
        cell.titleHeight.constant = [self lineCountForLabel:cell.title labelWidth:cell.frame.size.width - 10] * 35;
    }

    NSString *authorTime = [self getAuthorTime:[articles objectAtIndex:row]];
    if([authorTime isEqualToString:@""]) {
        cell.authorTimeHeight.constant = 0;
    } else {
        cell.authorTimeHeight.constant = 21;
    }
    cell.authorTime.text = authorTime;

    NSString *details = [[articles objectAtIndex:row] valueForKey:@"Introduction"];
    cell.details.attributedText = [self getAttributedString: details language: articleLangID];

    if([cellIdentifier isEqualToString:@"CellNoImg"]) {
        defaultLines = 5;
        if([cell.authorTime.text isEqualToString:@""]) defaultLines++;
        if([cell.labelName.text isEqualToString:@""]) defaultLines++;
        if(cell.titleHeight.constant / 35 == 1) defaultLines++;
        cell.details.numberOfLines = defaultLines;
    }

    if(indexPath.section == 0) {
        switch (indexPath.row)
        {
            case 2:
                cell.imageViewWidth.constant = Portrait ? 240 : 323;
                cell.imageViewHeight.constant = Portrait ? 151 : 199;
                break;
            case 3:
                cell.imageViewWidth.constant = Portrait ? 240 : 323;
                cell.imageViewHeight.constant = Portrait ? 151 : 199;
            case 5:
                cell.imageViewWidth.constant = Portrait ? 240 : 323;
                cell.imageViewHeight.constant = Portrait ? 151 : 199;
                break;
            case 6:
                cell.imageViewWidth.constant = Portrait ? 240 : 323;
                cell.imageViewHeight.constant = Portrait ? 151 : 199;
                break;
            default:
                cell.imageViewWidth.constant = Portrait ? 240 : 323;
                cell.imageViewHeight.constant = Portrait ? 151 : 199;
                break;
        }
    } else {
        cell.imageViewWidth.constant = Portrait ? 240 : 323;
        cell.imageViewHeight.constant = Portrait ? 151 : 199;
    }

    if (![articleImage isEqualToString:@""]) {
        NSURL *imageUrl = [NSURL URLWithString:articleImage];
        [cell.imageView sd_setImageWithURL:imageUrl];

    } else {
        [cell.imageView sd_setImageWithURL:nil];
    }

    if([articleLangID isEqualToString:@"1025"]) {
        [cell.contentView setTransform:CGAffineTransformMakeScale(-1, 1)];
        cell.labelName.textAlignment = NSTextAlignmentRight;
        cell.title.textAlignment = NSTextAlignmentRight;
        cell.authorTime.textAlignment = NSTextAlignmentRight;
        cell.details.textAlignment = NSTextAlignmentRight;
    } else {
        if (indexPath.row == 3) {
            [cell.contentView setTransform:CGAffineTransformMakeScale(-1, 1)];
            [cell.labelName setTransform:CGAffineTransformMakeScale(-1, 1)];
            [cell.title setTransform:CGAffineTransformMakeScale(-1, 1)];
            [cell.authorTime setTransform:CGAffineTransformMakeScale(-1, 1)];
            [cell.details setTransform:CGAffineTransformMakeScale(-1, 1)];
            [cell.imageView setTransform:CGAffineTransformMakeScale(-1, 1)];
        }
        cell.labelName.textAlignment = NSTextAlignmentLeft;
        cell.title.textAlignment = NSTextAlignmentLeft;
        cell.authorTime.textAlignment = NSTextAlignmentLeft;
        cell.details.textAlignment = NSTextAlignmentLeft;
    }
    return cell;

}

}

这是怎么回事？一旦你的应用程序在后台,你可以期望它随时被杀死 – 它不必使用过多的内存.

如果新的前台应用程序需要更多内存,操作系统将尽可能多地提供内存.它会向任何后台应用程序发送内存警告.如果他们没有通过减少内存占用而做出响应,或者前台应用程序仍然需要更多内存,则后台应用程序将被终止.

您的应用程序没有崩溃,它被操作系统杀死,因为它不再是前台应用程序,而且其他地方需要其资源.