Swift constraint warning

Question

I tried everything but can't find the solution for this warning XCode throws at me:

---

I have a tableView with cells.

The cells are dynamic height, because they have a view inside them: "message bubble".

Inside the message bubble, I have a label. If you click on a message bubble, the label's top-bottom margin constraint are expanding.

And there is a time label over the message bubble.

I get this warning:

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2018-08-15 10:50:40.805762+0200 PipeTest[2521:879876] [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:0x1c0296670 V:[UILabel:0x102790380'Hehe']-(14)-|   (active, names: '|':UIView:0x10278ff60 )>",
    "<NSLayoutConstraint:0x1c02945f0 V:|-(14)-[UILabel:0x102790380'Hehe']   (active, names: '|':UIView:0x10278ff60 )>",
    "<NSLayoutConstraint:0x1c0299780 UIView:0x102790b20.height == 27   (active)>",
    "<NSLayoutConstraint:0x1c0296d00 UILabel:0x102773e60' 9 minutes ago'.height == 18   (active)>",
    "<NSLayoutConstraint:0x1c02926b0 UIView:0x102790b20.bottom == UITableViewCellContentView:0x102784510.bottomMargin   (active)>",
    "<NSLayoutConstraint:0x1c02963a0 V:[UIView:0x10278ff60]-(7.67)-[UIView:0x102790b20]   (active)>",
    "<NSLayoutConstraint:0x1c0298a10 V:[UILabel:0x102773e60' 9 minutes ago']-(3)-[UIView:0x10278ff60]   (active)>",
    "<NSLayoutConstraint:0x1c0297070 UILabel:0x102773e60' 9 minutes ago'.top == UITableViewCellContentView:0x102784510.topMargin   (active)>",
    "<NSLayoutConstraint:0x1c0296760 'UIView-Encapsulated-Layout-Height' UITableViewCellContentView:0x102784510.height == 94   (active)>"
)

What am I doing wrong?

Answer 1

You have defined several height constraints (dimensions) as well as vertical constraints. Probably, you have over constrained. As proposed, lower the priorities of tome vertical constraints.