经过一段时间后，便士一直在检查Any / Any Size类的限制....这些与我在日志中吐出的错误约束相匹配。所以我在A / A尺寸类中设计了Popover视图并且工作正常！

After some time the penny dropped to check the Any/Any Size class constraints.... These were matching the erronous constraints that I was spitting out in the logs. So I designed the Popover view in the A/A size class and it worked fine!

这对某些人来说似乎很明显，但我认为这是因为我的应用程序是R / R我的Popover约束应该在R / R中。但是，如果您使用VC作为Popover，则需要在A / A Size Class中进行约束。

This might seem obvious to some but I thought that because my App was R/R that my Popover constraints should be in R/R. However it looks like that if you are using a VC as a Popover that the constraints need to be made in the A/A Size Class.