- (void)refreshImg:(NewTaskPointModel *)iCKTrendModel {    NSInteger count = iCKTrendModel.pictures.count;    if (count && count<= 9) {        CGFloat   itemH = 70;        NSInteger row = (count-1)/3;        NSInteger collecH = (row + 1) * itemH + row*2;                self.collectionView.hidden = NO;        self.collectionViewHCons.constant = collecH;        self.collectionViewWCons.constant = 214;        self.collectionTopCons.constant = 10;            } else {        self.collectionView.hidden = YES;        self.collectionViewHCons.constant = 0;        self.collectionViewWCons.constant = 0;        self.collectionTopCons.constant = 0;    }    //    滚动过程崩溃 布局与数据不符 原因是布局的缓存//    刷新数据    [self.collectionView reloadData];//    更新布局 //   立即执行更新  [self.contentView setNeedsLayout];   [self.contentView layoutIfNeeded];

}