ios - 在 UICollectionViewCell 中隐藏 UIImage

Question

我当前的 UICollectionViewCell 看起来像这样:

有时候不想显示图片。在这种情况下，我希望调整 UICollectionViewCell 的大小以仅适合 tmp、tmp1 和 tmp2。

我将如何完成这项工作？

Answer 1

Set the Constraint on height of Image View in the Storyboard or in the XIB. Drog the Constraint on your self UICollectionViewCell . If have an image, the Constraint.constant = your need. If have no image , the Constraint.constant = 0;

@property (weak, nonatomic) IBOutlet NSLayoutConstraint *pictureConstraint;

@end

@implementation CollectionViewCell

- (void)setModel:(cellObject *)model{
_model = model;
self.firstLabelView.text = model.firstLabelText;
self.secondLabelView.text = model.secondLabelText;
if (model.haveImage) {
    self.pictureView.image = [UIImage imageNamed:@"kitten"];
    self.pictureConstraint.constant = 149;
} else {
    self.pictureConstraint.constant = 0;
}}

在 Controller 中设置 itemSize。

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
cellObject *model = self.hahaArray[indexPath.item];
CGFloat height;
if (model.haveImage) {
    height = "your pictureConstraint.constant + thirdLabel.maxY + your bottom margin  ;
} else{
    height =  thirdLabel.maxY + your bottom margin   ;
}
return  CGSizeMake(self.flowLayout.itemSize.width, height);
}