Ios 收集视图中间的快速收集视图-中心单元

我试图将

UICollectionView

中的所有单元格放在中间。这些单元格被划分为11x4

我已经尝试使用下面的代码，但是，单元格被分组在一行中

我试图实现的目标如第二幅图所示：

错

应该是

同样在我的代码中，我有趣地将单元格分成4行，也许我应该在这里实现居中系统，但我不知道如何实现这一点。有什么想法吗

func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAtIndex section: Int) -> UIEdgeInsets {

        let totalCellWidth = 30 * 11
        let totalSpacingWidth = 2 * (11 - 1)

        let leftInset = (self.view.frame.size.width - CGFloat(totalCellWidth + totalSpacingWidth)) / 2;
        let rightInset = leftInset

        return UIEdgeInsetsMake(0, leftInset, 0, rightInset)
    }

---

找到解决方案：

func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAtIndex section: Int) -> UIEdgeInsets {

        let totalCellWidth = 30 * 11
        let totalSpacingWidth = 2 * (11 - 1)

        let leftInset = (self.view.frame.size.width - CGFloat(totalCellWidth + totalSpacingWidth)) / 2;
        let rightInset = leftInset

        let totalCellHeight = 30 * 4
        let totalSpacingHeight = 5 * (4 - 1)

        let topInset = (self.view.frame.size.height - CGFloat(totalCellHeight + totalSpacingHeight)) / 2;
        let bottInset = topInset

        return UIEdgeInsetsMake(topInset, leftInset, bottInset, rightInset)
    }

---

如果您喜欢更直观的方法，请尝试更改插图

func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAtIndex section: Int) -> UIEdgeInsets {

        let totalCellWidth = 30 * 11
        let totalSpacingWidth = 2 * (11 - 1)

        let leftInset = (self.view.frame.size.width - CGFloat(totalCellWidth + totalSpacingWidth)) / 2;
        let rightInset = leftInset

        let totalCellHeight = 30 * 4
        let totalSpacingHeight = 5 * (4 - 1)

        let topInset = (self.view.frame.size.height - CGFloat(totalCellHeight + totalSpacingHeight)) / 2;
        let bottInset = topInset

        return UIEdgeInsetsMake(topInset, leftInset, bottInset, rightInset)
    }