Thanush Shre Thanush Shre - 4 months ago 44
iOS Question

Unable to simultaneously satisfy constraints

Actually integrated camera application using xib, in that I placed uiview on a view, after that I put imageview, again view on imageview for cropping. then run the project I got this error.


2013-07-23 12:45:49.936 Camera_App1[30668:907] 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)


(
"<NSAutoresizingMaskLayoutConstraint:0x1f5b3d10 h=--& v=--& V:[UIView:0x1f5a2f70(460)]>",
"<NSLayoutConstraint:0x1f5a3c80 V:[UIView:0x1f5a31b0]-(385)-| (Names: '|':UIView:0x1f5a3120 )>",
"<NSLayoutConstraint:0x1f5a3f80 V:|-(0)-[UIView:0x1f5a3120] (Names: '|':UIView:0x1f5a2f70 )>",
"<NSLayoutConstraint:0x1f5a3f40 V:[UIView:0x1f5a3120]-(63)-| (Names: '|':UIView:0x1f5a2f70 )>",
"<NSLayoutConstraint:0x1f5a3bc0 V:|-(61)-[UIView:0x1f5a31b0] (Names: '|':UIView:0x1f5a3120 )>"
)

Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x1f5a3c80 V:[UIView:0x1f5a31b0]-(385)-| (Names: '|':UIView:0x1f5a3120 )>

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.
2013-07-23 12:45:58.697 Camera_App1[30668:907] media type=public.image
2013-07-23 12:45:58.701 Camera_App1[30668:907] global=public.image
2013-07-23 12:45:58.858 Camera_App1[30668:907] 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:0x1f5a3c80 V:[UIView:0x1f5a31b0]-(385)-| (Names: '|':UIView:0x1f5a3120 )>",
"<NSLayoutConstraint:0x1f5a3f80 V:|-(0)-[UIView:0x1f5a3120] (Names: '|':UIView:0x1f5a2f70 )>",
"<NSLayoutConstraint:0x1f5a3f40 V:[UIView:0x1f5a3120]-(63)-| (Names: '|':UIView:0x1f5a2f70 )>",
"<NSLayoutConstraint:0x1f5a3bc0 V:|-(61)-[UIView:0x1f5a31b0] (Names: '|':UIView:0x1f5a3120 )>",
"<NSAutoresizingMaskLayoutConstraint:0x1f53a430 h=--& v=--& V:[UIView:0x1f5a2f70(460)]>"
)

Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x1f5a3c80 V:[UIView:0x1f5a31b0]-(385)-| (Names: '|':UIView:0x1f5a3120 )>

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.

Answer

The error is what it says, and gives quite clear instructions for you to begin debugging. There are two constraints that conflict. Each instructs the Auto Layout runtime to do something that contradicts the other.

If you are creating and adding views programmatically, then chances are Auto Resizing attributes have been automatically translated to Auto Layout constraints.

So, the first thing to try is, with your programmatically created views, disable this by setting:

myProgrammaticView.translatesAutoresizingMaskIntoConstraints = NO;