ios - CollectionView内存虚拟机:CoreAnimation memory allocated and abandoned

Question

我有一些 collectionViews 和一个 TableView ，它们位于同一个 View Controller 中。相当奇怪的问题是，当我上下滚动时，内存总是会增加。仪器显示了 VM:CoreAnimation 对象的大量分配，但我无法追踪它们(它们位于 collectionView 本身内部)。准备重用正在单元格内部被调用，我检查了这一点。

这是代码:

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.receivedChannels = NO;
    self.ItemsDict = [NSMutableDictionary new];
    self.crtBatchSet = [NSMutableIndexSet new];


    if ([[PSDeviceInfo sharedInstance] is_iPad]) {
        self.epgWidth = EPG_WIDTH_IPAD;
    } else {
        self.epgWidth = EPG_WIDTH_IPHONE;
    }
    crtBatchSetSize = 0;
    self.currentSelecteIndexOfDateCell = 0;
    //size
    self.widthDictionary = [NSMutableDictionary new];
    self.centerXDictionary = [NSMutableDictionary new];

    self.layout = [[MultipleLineLayout alloc] initWithWidthDictionary:self.widthDictionary andCenterXDictionary:self.centerXDictionary];
    self.ItemsCollectionVIew.collectionViewLayout = self.layout;
    self.ItemsCollectionVIew.showsHorizontalScrollIndicator = NO;
    self.ItemsCollectionVIew.showsVerticalScrollIndicator = NO;
    self.layout.scrollDirection = UICollectionViewScrollDirectionHorizontal;
    [self.ItemsCollectionVIew registerClass:[ItemColectionCell class] forCellWithReuseIdentifier:@"ItemColectionCellID"];
    [self.hoursCollectionView registerClass:[HoursCollectionViewCell class] forCellWithReuseIdentifier:@"HoursColectionCellID"];
    [self.datePickerCollectionView registerClass:[DatePickerCollectionViewCell class] forCellWithReuseIdentifier:@"DatePickerColectionCellID"];


 }

-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
    if (scrollView == self.ItemsCollectionVIew){
        self.channelsTableView.contentOffset = CGPointMake(0, self.ItemsCollectionVIew.contentOffset.y);
        self.hoursCollectionView.contentOffset = CGPointMake(self.ItemsCollectionVIew.contentOffset.x, 0);
    }
    if (scrollView == self.channelsTableView) {
        self.ItemsCollectionVIew.contentOffset = CGPointMake(self.ItemsCollectionVIew.contentOffset.x,self.channelsTableView.contentOffset.y);
    }
    if (scrollView == self.hoursCollectionView) {
        self.ItemsCollectionVIew.contentOffset = CGPointMake(self.hoursCollectionView.contentOffset.x,self.ItemsCollectionVIew.contentOffset.y);
    }
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *channelCellID = @"ChannelTableCellID";
    ChannelTableCell *cell = [tableView dequeueReusableCellWithIdentifier:channelCellID forIndexPath:indexPath];
    cell.myIndexInTable = indexPath.row;

    cell.selectionStyle = UITableViewCellSelectionStyleNone;

    [cell getData];
    return cell;
}


#pragma mark - UITableViewDelegate Methods
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    [self.ItemsCollectionVIew reloadData];
}

#pragma mark - UICollectionViewDataSource Methods

-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
    if (collectionView == self.datePickerCollectionView || collectionView == self.hoursCollectionView) {
        return 1;
    }else{
        if (self.receivedChannels) {
            return totalNoChannels;
        } else {
            return 1;
        }
    }
}

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
    if (collectionView == self.datePickerCollectionView) {
        return DELTA_DAYS + 1;
    }else if (collectionView == self.hoursCollectionView) {
        return 48; //24 hours  *  2
    }else{
//        if (collectionView == self.ItemsCollectionVIew){
        NSArray *sectionItems = self.ItemsDict[@(section)];
        if (sectionItems) {
           // return sectionItems.count;
            return 100;
        } else {
            return 100;
        }
    }

    return 1;
}

// The cell that is returned must be retrieved from a call to -dequeueReusableCellWithReuseIdentifier:forIndexPath:
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{

    if (collectionView == self.datePickerCollectionView) {
        static NSString *ItemCellID = @"DatePickerColectionCellID";
        DatePickerCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:ItemCellID forIndexPath:indexPath];
        [self setDayAndDateforCell:cell at:indexPath];
        [cell setBackgroundColor:[self getColorForCell:self.currentSelecteIndexOfDateCell == indexPath.row ? YES:NO]];
        return cell;
    }else if (collectionView == self.hoursCollectionView){
        static NSString *ItemCellID = @"HoursColectionCellID";
        HoursCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:ItemCellID forIndexPath:indexPath];
        cell.hourLabel.text = [self getTimeLineCellValuerFor:indexPath];
        return cell;
    } else{
//    if (collectionView == self.datePickerCollectionView) {
        static NSString *ItemCellID = @"ItemColectionCellID";
        ItemColectionCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:ItemCellID forIndexPath:indexPath];

        NSArray *Items = self.ItemsDict[@(indexPath.section)];
        if (indexPath.row >= Items.count) {
            return cell;
        }
        MvpItem *prog = Items[indexPath.row];

        [cell updateInfo:prog];

        [cell setBackgroundColor:[self getColorForCell:NO]];

        return cell;
    }
}

#pragma mark - UICollectionViewDelegate Methods
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
    if (collectionView == self.datePickerCollectionView) {
        self.currentSelecteIndexOfDateCell = indexPath.row;
    }
    if (collectionView == self.ItemsCollectionVIew) {
        [self pushDetailsatIndexPath:indexPath];
    }
}

tableView单元格的代码是:

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        // Initialization code
        [self.layer setBorderColor:[UIColor blackColor].CGColor];
        [self.layer setBorderWidth:1.0f];
    }
    return self;
}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated
{
    [super setSelected:selected animated:animated];

    // Configure the view for the selected state
}

- (void)prepareForReuse{
    self.thumbnailImage.image = nil;
    self.channel = nil;
    [self clearDelegate];
    [super prepareForReuse];
}

- (void)dealloc
{
    [self clearDelegate];
}

- (void)clearDelegate
{
    NSString *url = self.channel.media_content.thumbPoster.url;
  //  [[ImageManager sharedInstance] removeDelegate:self forImgUrl:url];
    [[TVManager sharedInstance] removeDelegate:self];
}

- (void)getData
{
    [[TVManager sharedInstance] getChannelAndItemssForIndex:self.myIndexInTable forDateDelta:0 forDelegate:self];
}

- (void)didReceiveTotalNoChn:(NSInteger)totalChnNo{
    return;
}

- (void)didReceiveChannel:(MvpChannel *)channel withItemss:(NSArray *)Itemss forDateDelta:(NSInteger)date withIndex:(NSUInteger)index{
    if (index != self.myIndexInTable) {
        return;
    }
    if ([self.channel isEqual:channel]) {
        return;
    }
    self.channel = channel;
    NSString *imgUrl = self.channel.media_content.thumbPoster.url;
//    UIImage *img = [[ImageManager sharedInstance] getImageForUrl:imgUrl forIndex:self.myIndexInTable withDelegate:self];
//    if (img) {
//        self.thumbnailImage.image = img;
//    }
}

#pragma mark - Image Delegate

- (void)didReceiveImage:(UIImage *)image forIndex:(NSInteger)index
{
    if (index != self.myIndexInTable) {
        return;
    }
    if (image) {
        self.thumbnailImage.contentMode = UIViewContentModeScaleAspectFit;
        self.thumbnailImage.image = image;
        [self setNeedsLayout];
    }
}

在collectionViewCell内部:

@interface ItemColectionCell ()

@property (retain, nonatomic) UILabel *titleLabel;
@property (retain, nonatomic) UILabel *genreLabel;
@property (retain, nonatomic) UILabel *intervalLabel;

@end

@implementation ItemColectionCell //collection

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        [self.layer setBorderColor:[UIColor blackColor].CGColor];
        [self.layer setBorderWidth:1.0f];

        self.titleLabel = [[UILabel alloc] init];
        self.genreLabel = [[UILabel alloc] init];
        self.intervalLabel = [[UILabel alloc] init];

        [self.titleLabel setBackgroundColor:[UIColor clearColor]];
        [self.genreLabel setBackgroundColor:[UIColor clearColor]];
        [self.intervalLabel setBackgroundColor:[UIColor clearColor]];

        [self.titleLabel setTextColor:[UIColor whiteColor]];
        [self.genreLabel setTextColor:[UIColor whiteColor]];
        [self.intervalLabel setTextColor:[UIColor whiteColor]];

        [self.titleLabel setFont:[UIFont fontWithName:@“cf-Bold" size:15]];;
        [self.genreLabel setFont:[UIFont fontWithName:@“cf-Regular" size:11]];;
        [self.intervalLabel setFont:[UIFont fontWithName:@“cf-Regular" size:11]];;

    }
    return self;
}

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
    // Drawing code
}
*/

- (void)prepareForReuse{
    self.titleLabel.text = nil;
    self.genreLabel.text = nil;
    self.intervalLabel.text = nil;
    [self.titleLabel removeFromSuperview];
    [self.genreLabel removeFromSuperview];
    [self.intervalLabel removeFromSuperview];
    [super prepareForReuse];
}

- (void)updateInfo:(MvpItem*)item{
    if (!item) {
        return;
    }

    NSDateFormatter *startTimeFormat = [[NSDateFormatter alloc] init];
    [startTimeFormat setDateFormat:@"hh:mm"];

    NSDateFormatter *endTimeFormat = [[NSDateFormatter alloc] init];
    [endTimeFormat setDateFormat:@"hh:mm a"];

    NSString *startTime = [startTimeFormat stringFromDate:item.startTime];
    NSString *endTime = [endTimeFormat stringFromDate:item.endTime];

    self.titleLabel.frame = CGRectMake(10, 7, self.frame.size.width - 10, 15);
    self.genreLabel.frame = CGRectMake(10, 20, self.frame.size.width - 10, 15);
    self.intervalLabel.frame = CGRectMake(10, 32, self.frame.size.width - 10, 15);

    self.titleLabel.text = item.title;
    self.genreLabel.text = @“tewst”;
    self.intervalLabel.text = [NSString stringWithFormat:@"%@ - %@", startTime, endTime];

    [self addSubview:self.titleLabel];
    [self addSubview:self.genreLabel];
    [self addSubview:self.intervalLabel];
}

我可以做什么来解决这个问题？

Answer 1

您是否尝试删除单元格或在单元格结束显示时显示该单元格所触发的繁重任务？

- (void)collectionView:(UICollectionView *)collectionView didEndDisplayingCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath

或

- (void)tableView:(UITableView *)tableView didEndDisplayingCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath