固定单元宽度 - 无法同时满足约束

Question

刚刚迈出 IOS 开发的第一步，我想将我的 Android 应用程序带到 IOS。

UICollectionView 的问题。我需要单元格具有固定的恒定宽度，并且单元格内的图像 - 具有固定的高度。因此，我将 StackView 的宽度限制设置为 105，将 ImageView 的高度限制设置为 147。

一切看起来都如预期的那样，但是我在控制台中收到警告：

2021-02-21 22:23:17.490472+0200 myapp-ios[20727:783655] [LayoutConstraints] Unable to simultaneously satisfy constraints.
    Probably at least one of the constraints in the following list is one you don't want.
    Try this:
        (1) look at each constraint and try to figure out which you don't expect;
        (2) find the code that added the unwanted constraint or constraints and fix it.
(
    "<NSLayoutConstraint:0x600002193890 UIStackView:0x7f90efc173d0.width == 105   (active)>",
    "<NSLayoutConstraint:0x6000021938e0 H:[UIStackView:0x7f90efc173d0]-(0)-|   (active, names: '|':UIView:0x7f90efc1d840 )>",
    "<NSLayoutConstraint:0x600002193930 H:|-(0)-[UIStackView:0x7f90efc173d0]   (active, names: '|':UIView:0x7f90efc1d840 )>",
    "<NSLayoutConstraint:0x600002193a20 'UIIBSystemGenerated' myapp_ios.ShowCell:0x7f90efc23ec0.leading == UIView:0x7f90efc1d840.leading   (active)>",
    "<NSLayoutConstraint:0x600002193a70 'UIIBSystemGenerated' H:[UIView:0x7f90efc1d840]-(0)-|   (active, names: '|':myapp_ios.ShowCell:0x7f90efc23ec0 )>",
    "<NSLayoutConstraint:0x6000021967b0 'UIView-Encapsulated-Layout-Width' myapp_ios.ShowCell:0x7f90efc23ec0.width == 50   (active)>"
)

Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x600002193890 UIStackView:0x7f90efc173d0.width == 105   (active)>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.

我还尝试将 ImageView 的宽度和高度限制设置为 105x147，它看起来一样，并且警告几乎相同。基本上，如果没有设置宽度或高度约束 - 没有警告，一旦我添加它们中的任何一个 - 它就会出现。

以下是限制条件：

感谢您帮助我了解潜在问题。

Answer 1

我认为移除堆栈视图的宽度限制会起作用。