UICollectionViewCell大小等於UICollectionView大小

Question

我想UICollectionView單元大小等於UICollectionView的寬度和高度。

-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{ 
    CGSize size=collectionView.bounds.size; 
    return CGSizeMake(414.0, 586.0); 
} 

如果我使用size然後它引發自動佈局誤差the item height must be less than the height of the UICollectionView minus the section insets top and bottom values, minus the content insets top and bottom values.作爲高度是 650.0;它工作正常，如果我把高度設置爲586.0f

UICollectionView frame = (0 0; 414 650); 
contentOffset: {0, 0}; contentSize: {0, 514} 

那麼，我該如何解決這個高度問題？

Answer 1

爲iOS 9/10嘗試下UIController方法

- (void)viewDidLayoutSubviews { 
    [super viewDidLayoutSubviews]; 

    CGSize scrollSize = self.collectionView.frame.size; 
    UICollectionViewFlowLayout *layout = (UICollectionViewFlowLayout *)self.collectionView.collectionViewLayout; 
    UIEdgeInsets inset = layout.sectionInset; 
    [layout setItemSize:CGSizeMake(scrollSize.width - inset.left - inset.right, scrollSize.height - inset.top - inset.bottom)]; 

    [self.collectionView.collectionViewLayout invalidateLayout]; 
}