UIButton高度限制迅速不起作用

Question

So I have this UIButton with constraints in a storyboard that looks like this.... with constraints to safe areas as well as a height/width constraint. the height constraint is set to 30

but the output looks like... (deff not 30 height and regardless of what I set as the height constraint it looks like the following) also the buttons other than Daily are not shown because they have no constraints yet!

here are the constraints

2019-03-04 01:43:35.157418-0500 Daily[831:112538] [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

Answer 1

In this case, height and bottom constraint will conflict, I think you have set top, bottom, and height constraint property of UIbutton , So if you want fixed height 15 then remove the bottom constraint. and if you don't want fixed hight then keep as it is a bottom constraint and remove height constraint of UIbutton .

Answer 2

Look for Constraints error/warning at runtime. If there is inconsistency, few constraints are removed during runtime.

Try setting vertical content hugging property - High. This will inform system, content does not want to grow.

Answer 3

Don't use unnecessary constraints as you were set both width and leading, trailing. You can check this by updating constraints as attached image.

Feel free to ask me if any problem

*Remember, this is a sample button to guide you.