AutoLayout constraints conflict after strings translation

Question

On a well working application, I just did the strings translation in code and storyboard and then, I get an 'Unable to simultaneously satisfy constraints' error.

The error is:

    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. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
 "<NSLayoutConstraint:0x1d5408d0 V:[UIView:0x1d540c40(0)]>",
 "<NSLayoutConstraint:0x1d540910 V:|-(0)-[UIView:0x1d540c40]   (Names: '|':UIView:0x1d541100 )>",
 "<NSLayoutConstraint:0x1d540fd0 V:[UILabel:0x1d541040(21)]>",
 "<NSLayoutConstraint:0x1d5407d0 V:[UIView:0x1d540c40]-(20)-[UILabel:0x1d541040]>",
 "<NSLayoutConstraint:0x1d540710 V:[LTSelectView:0x1d542210]-(360)-|   (Names: '|':UIView:0x1d541100 )>",
 "<NSAutoresizingMaskLayoutConstraint:0x1d5928b0 h=--& v=--& V:[UIView:0x1d541100(416)]>",
 "<NSLayoutConstraint:0x1d540690 V:[UILabel:0x1d541040]-(19)-[LTSelectView:0x1d542210]>"
 )

Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x1d540fd0 V:[UILabel:0x1d541040(21)]>

Break on objc_exception_throw to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.

Does the translation somewhere responsible of it?

I read few posts on this subject but reasons are really not easy to understand for me.

So my objects are:

UILabel: Height equals 21 Width equals: 220 Top space to top Layout: 17 Align center X to: superview Bottom space to Selectview: 22

LTSelectView: Width equals to: 160 Height equals to: 30 Align center X to: superview Top space to UILabel: 22 Bottom space to UIButton: 67

UIButton: Width equals to: 100 Height equals to: 30 Top space to SelectView: 67 Align center to: superview

And in fact I can see the UILabel, the UIButton but not the LTSelectView. So the problem is certainly here. I trie to use the obj_exception_throw but I did get anything.

After other tests, I only the problem on iOS6. Things go well on iOS7.

Did you add the constraints in code? There is this NSAutoresizingMaskLayoutConstraint which looks like you forgot to set the translatesAutoresizingMasksToContraints to NO. — dasdom
No I didn't add any constraints in code and in doubt, I add this line in my viewDidLoad method and the result is a pure nightmare! Nothing is in a right location anymore. — fralbo

fred foc fred foc · Accepted Answer · 2014-09-19T14:55:38

One of your label has too many vertical constraints and they can not be satisfied at the same time.

Change the priority of some constraints or rebuild them.

AutoLayout constraints conflict after strings translation

1 Answers