Образ изображения вышел из ячейки просмотра коллекции

Question

Я новичок в разработке iOS, и это мой первый проект, который я делаю в одиночку. Я пытаюсь показать канал неофициальной страницы моего колледжа, используя uicollectionview. Я пытался много разных вещей, но ничего, кажется, work.The вид изображения переместилась из collectionviewcell UICollectionViewController.m файл

- (void)viewDidLoad { 
[super viewDidLoad]; 
self.title = @"DCE Speaks Up"; 
self.collectionView.backgroundColor = [UIColor colorWithWhite:0.95 alpha:1]; 
// Uncomment the following line to preserve selection between presentations 
// self.clearsSelectionOnViewWillAppear = NO; 
NSError *error= nil; 

NSURL *feedURL = [NSURL URLWithString:@"https://graph.facebook.com/382057938566656/feed?fields=id,full_picture,message,story,created_time,link&access_token=1750413825187852%7CkUl9nlZFPvdGxGZX4WYabKKG2G4"]; 

NSData *jsonData = [NSData dataWithContentsOfURL:feedURL]; 

NSDictionary *dataDictionary= [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error]; 
self.feedArray = [NSMutableArray array]; 
NSArray *feedTempArray = [dataDictionary objectForKey:@"data"];  //feedTempArray just used for parsing 

for (NSDictionary *feedDictionary in feedTempArray) { 
    FacebookFeed *fbFeed =[FacebookFeed facebookFeedWithMessage:[feedDictionary objectForKey:@"message"]]; 
    fbFeed.story = [feedDictionary objectForKey:@"story"]; 
    fbFeed.imageURL = [NSURL URLWithString:[feedDictionary objectForKey:@"full_picture"]]; 
    fbFeed.date = [feedDictionary objectForKey:@"created_time"]; 
    fbFeed.sharedLink = [NSURL URLWithString:[feedDictionary objectForKey:@"link"]]; 
    [self.feedArray addObject:fbFeed]; 
} 



// Register cell classes 
[self.collectionView registerClass:[FacebookCollectionViewCell class] forCellWithReuseIdentifier:reuseIdentifier]; 

// Do any additional setup after loading the view. 

}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath { 
FacebookCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath]; 
cell.feed = self.feedArray[indexPath.row]; 
cell.sizeDictionary = [self sizeForLabelAtIndexPath:indexPath.row collectionView:collectionView]; 
// Configure the cell 
for (UIView *view in cell.contentView.subviews) { 
    if ([view isKindOfClass:[UILabel class]]) { 
     [view removeFromSuperview]; 
    }else if ([view isKindOfClass:[UIImageView class]]){ 
     [view removeFromSuperview]; 
    } 
} 
    cell.layer.shouldRasterize = YES;   
    cell.layer.rasterizationScale = [UIScreen mainScreen].scale; 
return cell; 
} 
#pragma mark <UICollectionViewDelegateFlowLayout> 
-(CGSize) collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{ 
    NSDictionary *sizeDictionary = [[NSDictionary alloc] init]; 
    sizeDictionary = [self sizeForLabelAtIndexPath:indexPath.row collectionView:collectionView]; 
     return CGSizeMake(self.view.frame.size.width - 20, [sizeDictionary[@"imageHeight"] floatValue] + [sizeDictionary[@"messageHeight"] floatValue] + [sizeDictionary[@"nameHeight"] floatValue]); 
} 
#pragma mark <UICollectionViewDelegate> 
- (NSDictionary *) sizeForLabelAtIndexPath:(NSUInteger)indexPath collectionView:(UICollectionView *)collectionView{ 
FacebookFeed *feed = self.feedArray[indexPath]; 
CGSize nameSize = CGSizeFromString(@"DCE Speaks Up"); 
CGSize imageSize = CGSizeMake(0, 0); 
if (feed.imageURL) { 
    imageSize = CGSizeMake(470, 394); 
} 
float height = 80; 
NSString *string = @""; 
if (feed.message) { 
    string = [feed.message stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; 
}else if (feed.story){ 
    string = [feed.story stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; 
} 
if (string) { 
    NSDictionary *attributes = @{ 
           NSFontAttributeName : [UIFont preferredFontForTextStyle:UIFontTextStyleBody] 
           }; 
    CGRect bodyFrame = 
    [string boundingRectWithSize:CGSizeMake(CGRectGetWidth(collectionView.bounds), 
              CGFLOAT_MAX) 
         options:(NSStringDrawingUsesLineFragmentOrigin) 
         attributes:attributes 
         context:nil]; 

    height += ceilf(CGRectGetHeight(bodyFrame)); 
} 
return @{ @"imageHeight" : @(imageSize.height) , @"messageHeight" : @(height) , @"nameHeight" : @(nameSize.height)}; 
} 

Пользовательский файл ячейки

@implementation FacebookCollectionViewCell 

- (instancetype)initWithFrame:(CGRect)frame{ 
self = [super initWithFrame:frame]; 
if (self) 
{ 
    self.contentView.backgroundColor = [UIColor whiteColor]; 
    // change to our custom selected background view 
    self.imageView = [[UIImageView alloc] init]; 
    self.messageLabel = [[UILabel alloc] init]; 
    self.nameLabel = [[UILabel alloc] init]; 
} 
return self; 
} 

-(void) setFeed:(FacebookFeed *)feed{ 
_feed = feed; 
self.messageLabel.numberOfLines = 0; 
self.messageLabel.lineBreakMode = 0; 
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ 
    NSData *data= [NSData dataWithContentsOfURL:feed.imageURL]; 
    UIImage *theImage=[UIImage imageWithData:data]; 

    dispatch_async(dispatch_get_main_queue(), ^{ 
     self.imageView.image= theImage ; 
    }); 
}); 
if (feed.message) { 
    self.messageLabel.text = [[NSString alloc] initWithString:[feed.message stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]]; 
}else{ 
    self.messageLabel.text = [[NSString alloc] initWithString:[feed.story stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]]; 
} 
self.messageLabel.font = [UIFont fontWithName:@"ArialMT" size:11]; 
[self.messageLabel sizeToFit]; 
self.nameLabel.text = @"DCE Speaks Up"; 
[self.nameLabel setFont:[UIFont fontWithName:@"ArialMT" size:12]]; 
[self.nameLabel sizeToFit]; 
} 
-(void) layoutSubviews{ 
NSLog(@"%@",self.feed); 
self.nameLabel.frame = CGRectMake(10, 10, self.contentView.bounds.size.width, [self.sizeDictionary[@"nameHeight"] floatValue]); 
float height = 200; 
if (self.contentView.bounds.size.height - [self.sizeDictionary[@"messageHeight"] floatValue] -[self.sizeDictionary[@"nameHeight"] floatValue] >100) { 
    height = self.contentView.bounds.size.height - [self.sizeDictionary[@"messageHeight"] floatValue] -[self.sizeDictionary[@"nameHeight"] floatValue]; 
} 
if (self.feed.imageURL) { 
    self.imageView.frame = CGRectMake(10, [self.sizeDictionary[@"messageHeight"] floatValue] +[self.sizeDictionary[@"nameHeight"] floatValue], self.contentView.bounds.size.width - 20,height); 
    self.messageLabel.frame = CGRectMake(10, [self.sizeDictionary[@"nameHeight"] floatValue] +10, self.contentView.bounds.size.width - 10, [self.sizeDictionary[@"messageHeight"] floatValue]); 

    [self.contentView addSubview:self.messageLabel]; 
    [self.contentView addSubview:self.imageView]; 

}else{ 
    self.messageLabel.frame = CGRectMake(10, [self.sizeDictionary[@"nameHeight"] floatValue], self.contentView.bounds.size.width - 10, [self.sizeDictionary[@"messageHeight"] floatValue]); 
    [self.contentView addSubview:self.messageLabel]; 
} 
[self.contentView addSubview:self.nameLabel]; 

} 
@end 

Answer 1

Это, скорее всего, проблема с ограничениями, похоже, вы не добавили никаких программных ограничений.

Попробуйте что-то вроде этого с вашими взглядами, это, конечно, пример, поэтому, чтобы изображениеView обнимало границы, вы идеально поставили его на 0 с любой стороны. Выполнение self.bounds или self.view.bounds.width/height и т. Д. Никогда не работало для меня в ячейках, поэтому я всегда делаю это так.

NSDictionary *viewsDictionary = NSDictionaryOfVariableBindings(_yourImageView); 

    NSArray *constraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-0-[yourImageView]-0-|" options:0 metrics:nil views:viewsDictionary]; 

    NSArray *horizontalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-0-[yourImageView]-0-|" options:0 metrics:nil views:viewsDictionary]; 

    [self.contentView addConstraints:constraints]; 
    [self.contentView addConstraints:horizontalConstraints];