我有一个带有集合视图的应用程序，以及此集合视图中的一个单元格，该单元格重定向到外部链接。
每当该链接打开时，应用程序就会在后台崩溃并在调试器上显示：
“由于内存问题而终止”。
如果我只按主页按钮，应用程序就会继续正常工作。
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;
}
}
这是在什么设备上发生的？一旦您的应用程序进入后台，您就可以随时终止它 - 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，操作系统将提供尽可能多的内存。它将向任何后台应用程序发送内存警告。如果它们不通过减少内存占用来做出响应，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，而是被操作系统杀死，因为它不再是前台应用程序，并且其他地方需要它的资源。
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