我试图将两种不同UICollectionViewCells的东西合二为一UICollectionView。它正在工作，但经过一些滚动后，我收到内存警告并且应用程序崩溃。
这是我的代码：
创建并填充单元格：
-(UICollectionViewCell*)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
static NSString *cellIdentifier = @"KatalogBAGCell";
BAGCell *cell = (BAGCell*)[collectionView dequeueReusableCellWithReuseIdentifier:cellIdentifier forIndexPath:indexPath];
id unknown = [[self.katalogBAGs objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
BAGObject* bag = nil;
SerienObject* serie = nil;
NSString *filePath;
if ([unknown isKindOfClass:[SerienObject class]]) {
serie = (SerienObject*)unknown;
cell = nil;
cell = [[BAGCell alloc] initWithSerie:serie.serienID];
filePath = serie.completePath;
cell.bagText.text = serientext;
cell.directText.text = serie.serienName;
[cell.directText sizeToFit];
}
else {
bag = (BAGObject*)unknown;
if ( [self isEmptyCell:bag.fileName] ) {
cell.alpha = 0.0;
cell.hidden = cell.contentView.hidden = YES;
return cell;
}
else {
cell.alpha = 1.0;
cell.hidden = cell.contentView.hidden = NO;
// should be a real bag
if (self.viewMode==0) {
// regular floating mode
cell.fullscreenButton.hidden = NO;
[cell.bookmarkButton addTarget:self action:@selector(createBookMarkForThisBAG:) forControlEvents:UIControlEventTouchUpInside];
[cell.fullscreenButton addTarget:self action:@selector(pushToFullScreenView:) forControlEvents:UIControlEventTouchUpInside];
}
else if (self.viewMode==1) {
// fullscreen mode
cell.fullscreenButton.hidden = YES;
[cell.bookmarkButton addTarget:self action:@selector(createBookMarkForThisBAG:) forControlEvents:UIControlEventTouchUpInside];
}
filePath = bag.completePath;
// clear the reused cell
for (UIView *v in [cell.directOrderContainer subviews]) {
if ((UILabel*)v==cell.directText) {
continue;
}
[v removeFromSuperview];
}
if (SAMOADelegate.appIsInPresentationMode==NO) {
// generate the infos for the textInfoLine
NSString *artCols = @"a.vkpreis, a.ve, a.groesse, a.ausverkauft";
NSString *sqlStatement = [NSString stringWithFormat:@"SELECT %@ FROM kataloge_bags_artikel as ba LEFT JOIN artikel as a ON a.artikel = ba.artikelnr where ba.bagid=%i order by ba.position_in_bag ASC", artCols, bag.bagID];
sqlite3_stmt *itemSQL;
NSString *lineText = @"";
int c = 0;
if(sqlite3_prepare_v2([ToolBox db], [sqlStatement UTF8String], -1, &itemSQL, NULL) == SQLITE_OK) {
while(sqlite3_step(itemSQL) == SQLITE_ROW) {
ArticleItem *item = [[ArticleItem alloc] init];
item.vkpreis = [[NSDecimalNumber alloc] initWithFloat:[self.helper calculateArticlePriceforPrice:sqlite3_column_double(itemSQL, 0)]];
item.verpackungseinheit = sqlite3_column_int(itemSQL, 1);
item.sizeInCM = [ToolBox convertFloatToString:sqlite3_column_double(itemSQL, 2)];
item.ausverkauft = [ToolBox checkNullString:(char *)sqlite3_column_text(itemSQL, 3)];
NSString *trenner = @"";
if (c!=0) {
trenner = @" · ";
}
if (item.ausverkauft.length!=0) {
// ausverkauft
NSString *price = [NSString stringWithFormat:@"- %@", SAMOADelegate.loggedInCustomer.waehrungsZeichen];
NSString *part = [NSString stringWithFormat:@"%@%@ %@:%i %@ %@", trenner, price, veText, item.verpackungseinheit, item.sizeInCM, cmText];
lineText = [lineText stringByAppendingString:part];
}
else {
// not ausverkauft
NSString *price = [ToolBox convertDecimalNumber: item.vkpreis withCurrencySymbol:SAMOADelegate.loggedInCustomer.waehrungsZeichen];
NSString *part = [NSString stringWithFormat:@"%@%@ %@:%i %@ %@", trenner, price, veText, item.verpackungseinheit, item.sizeInCM, cmText];
lineText = [lineText stringByAppendingString:part];
}
c++;
}
} else { [ToolBox logDatabaseError:_cmd]; } sqlite3_finalize(itemSQL);
bag.textInfoLine = lineText;
}
// check if this an article which you can order directly
if (bag.amountOfArticles==1) {
[self createDirectOrderViewForCell:cell andItem:bag];
[cell.directText setText:bag.marketingtext];
}
else {
cell.defaultContainer.hidden = NO;
cell.directOrderContainer.hidden = YES;
if (SAMOADelegate.appIsInPresentationMode==YES) {
[cell.bagText setText:bag.marketingtext];
}
else {
[cell.bagText setText:bag.textInfoLine];
}
}
if (bag.isBookMarked==YES) {
[cell.bookmarkButton setImage:[UIImage imageNamed:@"bookmark-icon-active.png"] forState:UIControlStateNormal];
}
else {
[cell.bookmarkButton setImage:[UIImage imageNamed:@"bookmark-icon-inactive.png"] forState:UIControlStateNormal];
}
if (SAMOADelegate.appIsInPresentationMode==YES) {
cell.bookmarkButton.hidden = YES;
}
// check if this bag is already in the cart
int artInCart = [ToolBox returnSQLCountForQuery:[NSString stringWithFormat:@"SELECT COUNT(*) FROM auftragsposition where auftragsnr = '%i' AND bagid = '%i' LIMIT 1", SAMOADelegate.currentOrder.belegnr, bag.bagID]];
if (artInCart) {
cell.isInCartStateView.image = [UIImage imageNamed:@"ordered-dot.png"];
}
else {
cell.isInCartStateView.image = [UIImage imageNamed:@"not-ordered-dot.png"];
}
self.lastLoadedBagIs = bag.bagID;
self.latestLoadedIndex = indexPath.row;
}
}
__weak UIActivityIndicatorView *iV = cell.loadingIndicator;
[cell.loadingIndicator startAnimating];
[cell.bagImageView setImageWithURL:[NSURL fileURLWithPath:filePath]
placeholderImage:nil
options:0
progress:^(NSUInteger receivedSize, long long expectedSize) { [iV startAnimating]; }
completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType) { [iV stopAnimating];
}];
//rounded corners for the cell
[self roundedCornersForLayerinCell:cell.bagImageView.layer];
[cell.bagImageView.layer setShadowPath:[[UIBezierPath bezierPathWithRoundedRect:cell.frame cornerRadius:cell.layer.cornerRadius] CGPath]];
UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:cell.bounds byRoundingCorners:UIRectCornerBottomLeft|UIRectCornerBottomRight cornerRadii:CGSizeMake(10.0, 10.0)];
CAShapeLayer *maskLayer = [CAShapeLayer layer];
maskLayer.frame = cell.bounds;
maskLayer.path = maskPath.CGPath;
// Set the newly created shape layer as the mask for the image view's layer
cell.layer.mask = maskLayer;
return cell;
}
和单元格对象*.m：
-(id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
// Initialization code
NSArray *arrayOfViews = [[NSBundle mainBundle] loadNibNamed:@"BAG-Template-1" owner:self options:nil];
if (arrayOfViews.count < 1) {
return nil;
}
if (![[arrayOfViews objectAtIndex:0] isKindOfClass:[UICollectionViewCell class]]) {
return nil;
}
self = [arrayOfViews objectAtIndex:0];
}
return self;
}
和辅助初始化单元：
-(id)initWithSerie:(int)serienID {
self = [super init];
if (self) {
if (serienID>0) {
// Initialization code
NSArray *arrayOfViews = [[NSBundle mainBundle] loadNibNamed:@"BAG-Template-2" owner:self options:nil];
if (arrayOfViews.count < 1) {
return nil;
}
if (![[arrayOfViews objectAtIndex:0] isKindOfClass:[UICollectionViewCell class]]) {
return nil;
}
self = [arrayOfViews objectAtIndex:0];
}
else {
// Initialization code
NSArray *arrayOfViews = [[NSBundle mainBundle] loadNibNamed:@"BAG-Template-1" owner:self options:nil];
if (arrayOfViews.count < 1) {
return nil;
}
if (![[arrayOfViews objectAtIndex:0] isKindOfClass:[UICollectionViewCell class]]) {
return nil;
}
self = [arrayOfViews objectAtIndex:0];
}
}
return self;
}
知道为什么我会收到内存警告吗？