视图高度的AMBIGUOUS布局

Question

我有一个UITableView与一个单元格，其中包含：

Title label + UIStackView带有一些按钮，下面有一个UIStackView，带有另一个标签（描述），UICollectionView（图像集）和一个按钮。标题标签固定在前导，尾随和顶部超视图上，底部固定在UIStackView上（固定在标签的前端，尾部，底部和超视图的底部）。

我也在使用UITableViewAutomaticDimension，因为UIStackView（图片，文字）内容高度可能不同。

在我向UICollectionView添加UIStackView之前，一切正常，但在某些情况下添加它后布局破坏（UIStackView内部的所有内容都重叠），在View UI Hierarchy中我可以看到警告：

*UIView:0x1038635e0- AMBIGUOUS LAYOUT for UIView:0x1038635e0.Height{id: 3153}

Legend:
    * - is laid out with auto layout
    + - is laid out manually, but is represented in the layout engine because translatesAutoresizingMaskIntoConstraints = YES
    • - layout engine host
2018-01-03 10:19:58.527094+0100 Crowd Knowledge[1462:1408352] [LayoutConstraints] View has an ambiguous layout. See "Auto Layout Guide: Ambiguous Layouts" for help debugging. Displaying synopsis from invoking -[UIView _autolayoutTrace] to provide additional detail.

*Crowd_Knowledge.AttachmentsCollectionView:0x104072e00- AMBIGUOUS LAYOUT for Crowd_Knowledge.AttachmentsCollectionView:0x104072e00.minY{id: 3263}, Crowd_Knowledge.AttachmentsCollectionView:0x104072e00.Height{id: 3252}

Legend:
    * - is laid out with auto layout
    + - is laid out manually, but is represented in the layout engine because translatesAutoresizingMaskIntoConstraints = YES
    • - layout engine host
2018-01-03 10:19:58.531696+0100 Crowd Knowledge[1462:1408352] [LayoutConstraints] View has an ambiguous layout. See "Auto Layout Guide: Ambiguous Layouts" for help debugging. Displaying synopsis from invoking -[UIView _autolayoutTrace] to provide additional detail.

*UIButton:0x103854dc0'Edit solution'- AMBIGUOUS LAYOUT for UIButton:0x103854dc0'Edit solution'.minY{id: 3261}, UIButton:0x103854dc0'Edit solution'.Height{id: 3258}

Legend:
    * - is laid out with auto layout
    + - is laid out manually, but is represented in the layout engine because translatesAutoresizingMaskIntoConstraints = YES
    • - layout engine host
2018-01-03 10:19:59.247887+0100 Crowd Knowledge[1462:1408352] [LayoutConstraints] Window has a view with an ambiguous layout. See "Auto Layout Guide: Ambiguous Layouts" for help debugging. Displaying synopsis from invoking -[UIView _autolayoutTrace] to provide additional detail.

*UIView:0x1038635e0- AMBIGUOUS LAYOUT for UIView:0x1038635e0.Height{id: 3153}

Legend:
    * - is laid out with auto layout
    + - is laid out manually, but is represented in the layout engine because translatesAutoresizingMaskIntoConstraints = YES
    • - layout engine host

此外，我的UICollectionView有一个布局，根据内容设置高度：

class DynamicCollectionView: UICollectionView {

    override func layoutSubviews() {
        super.layoutSubviews()
        if !__CGSizeEqualToSize(bounds.size, self.intrinsicContentSize) {
            self.invalidateIntrinsicContentSize()
        }
    }

    override var intrinsicContentSize: CGSize {
        return contentSize
    }

}

我在故事板中没有任何警告，它在90％的时间都有效。如果它被打破，我所要做的就是滚动另一个单元格，这样它就会刷新并且约束再次起作用。我尝试了各种技巧来强制更新UI (tableView.beginUpdates() + tableView.endUpdates())，但我仍然无法找到一个始终有效的解决方案。

我正在为这个问题寻找一个干净的解决方案。