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，它重定向到外部链接。
每当该链接打开时，应用程序在后台崩溃并在调试器上提供：
“由于内存问题而终止”。
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来响应，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。
我有同样的问题 – 当内存使用率仍然很低时因内存问题而终止。
然后我找到了原因：实际上分配的内存非常快。
仅仅因为内存被很快破坏，所以内存使用量似乎仍然非常低。 您可以使用仪器查看当前内存使用情况/总内存使用情况图片，以说明查看内存使用情况/总内存使用情况图片是从互联网上找到的，但请清楚说明问题。 您将在快速减少中找到此值，浅色区域快速增长，然后当内存使用率仍然较低时，您的应用程序因内存问题而崩溃。