I have the following simple test code in my controller:
- (void)loadView
{
UIView *view = [UIView new];
[self setView:view];
UILabel *label = [UILabel new];
[label setText:#"Hello World!"];
[view addSubview:label];
[view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"|-[label]"
options:0 metrics:nil views:NSDictionaryOfVariableBindings(label)]];
}
The code fails with the following exception and I can't figure out why. Any help would be greatly appreciated:
2013-04-15 14:15:47.880 libmarkup-test[1072:c07] 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:0x753eb60 H:|-(NSSpace(20))-[UILabel:0x7536b60] (Names: '|':UIView:0x75376a0 )>",
"<NSAutoresizingMaskLayoutConstraint:0x712a2c0 h=--& v=--& UILabel:0x7536b60.midX ==>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x753eb60 H:|-(NSSpace(20))-[UILabel:0x7536b60] (Names: '|':UIView:0x75376a0 )>
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.
The "unable to simultaneously satisfy constraints" message is especially confusing since, as far as I can tell, I'm only specifying one constraint.
It looks like you forgot to set translatesAutoresizingMaskIntoConstraints on the UILabel. By default it will be YES. So the autoresizing mask on that label are translated to additional constraints, which are then conflicting with the one you specified.
Adding this should fix the constraint issue:
label.translatesAutoresizingMaskIntoConstraints = NO;
You should probably think about a vertical constraints on that label as well.
please adjust the constraint priority( default is 1000) and hugging priority(default is 250)
Related
I have a UILabel and a UITextField that I created, and added constraint programmatically. Here is the code I inserted in viewDidLoad:
UILabel *currencyLabel = [[UILabel alloc] init];
UITextField dollars = [[UITextField alloc] init];
CGRect label = CGRectMake(0, 0, 12, 33);
currencyLabel.frame = label;
CGRect textField = CGRectMake(12, 0, self.amountView.frame.size.width - 12, 33);
dollars.frame = textField;
[self.amountView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"H:|-0-[currencyLabel(12)]-3-[dollars]-0-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(currencyLabel, dollars)]];
[self.amountView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"V:|-0-[currencyLabel]-0-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(currencyLabel)]];
[self.amountView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"V:|-0-[dollars]-0-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(dollars)]];
When I run it, the textField and label are not positioned correctly, and I get the following error:
2015-06-10 22:20:17.248 myApp[2591:134955] 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:0x7f82995382d0 H:|-(0)-[UILabel:0x7f829959e320] (Names: '|':UIView:0x7f8299450070 )>",
"<NSLayoutConstraint:0x7f82995bd6e0 H:[UILabel:0x7f829959e320(12)]>",
"<NSLayoutConstraint:0x7f82995bd730 H:[UILabel:0x7f829959e320]-(3)-[UITextField:0x7f82994e8bf0]>",
"<NSAutoresizingMaskLayoutConstraint:0x7f82995d4310 h=--& v=--& UITextField:0x7f82994e8bf0.midX == + 221>",
"<NSAutoresizingMaskLayoutConstraint:0x7f82995d4360 h=--& v=--& H:[UITextField:0x7f82994e8bf0(418)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x7f82995bd730 H:[UILabel:0x7f829959e320]-(3)-[UITextField:0x7f82994e8bf0]>
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.
2015-06-10 22:20:17.250 myApp[2591:134955] 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:0x7f82994edad0 H:[UIButton:0x7f829954ee80'Expense'(71)]>",
"<NSLayoutConstraint:0x7f829953bec0 H:[UIButton:0x7f829954c6f0'Income'(71)]>",
"<NSLayoutConstraint:0x7f82994503a0 UIButton:0x7f829954c6f0'Income'.leading == UITableViewCellContentView:0x7f82994582f0.leadingMargin>",
"<NSLayoutConstraint:0x7f82994504b0 H:[UIButton:0x7f829954c6f0'Income']-(0)-[UIButton:0x7f829954ee80'Expense']>",
"<NSLayoutConstraint:0x7f8299450550 UIView:0x7f8299450070.trailing == UITableViewCellContentView:0x7f82994582f0.trailingMargin>",
"<NSLayoutConstraint:0x7f82994505a0 H:[UIButton:0x7f829954ee80'Expense']-(12)-[UIView:0x7f8299450070]>",
"<NSLayoutConstraint:0x7f82995bd780 H:[UITextField:0x7f82994e8bf0]-(0)-| (Names: '|':UIView:0x7f8299450070 )>",
"<NSAutoresizingMaskLayoutConstraint:0x7f82995d4310 h=--& v=--& UITextField:0x7f82994e8bf0.midX == + 221>",
"<NSAutoresizingMaskLayoutConstraint:0x7f82995d4360 h=--& v=--& H:[UITextField:0x7f82994e8bf0(418)]>",
"<NSLayoutConstraint:0x7f82995c1280 'UIView-Encapsulated-Layout-Width' H:[UITableViewCellContentView:0x7f82994582f0(375)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x7f82995bd780 H:[UITextField:0x7f82994e8bf0]-(0)-| (Names: '|':UIView:0x7f8299450070 )>
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.
Try add:
self.view.translatesAutoresizingMaskIntoConstraints = NO;
I see "NSAutoresizingMaskLayoutConstraint", I think you don't want these constraints
I have a UIView in a UITableViewCell. in the view, I have a UITextView and a UIView. They are both auto constraint on all 4 sides.
The UIView has a height constraint. I would like to update the height constraint prorrammatically. I made a outlet of the height constraint so I can change it.
Here is my code:
CGRect frame = self.myView.frame;
frame.size.height = 50;
frame.size.width = self.myView.frame.size.width;
self.myView.frame = frame;
self.viewHeight.constant = 50;
[myTableView reloadData];
When I run this code, it works perfectly, but I get an error: (I'm pretty new to objective c, so I don't understand what it's trying to say.)
2015-01-26 15:25:43.408 myApp[1449:55334] 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:0x7fb07853ac20 V:[UIView:0x7fb0784dbb80(50)]>",
"<NSLayoutConstraint:0x7fb0785bd170 V:|-(0)-[UITextView:0x7fb07896de00] (Names: '|':UIView:0x7fb07857fb70 )>",
"<NSLayoutConstraint:0x7fb0785bd260 V:[UITextView:0x7fb07896de00]-(3)-[UIView:0x7fb0784dbb80]>",
"<NSLayoutConstraint:0x7fb0785bd350 V:[UIView:0x7fb0784dbb80]-(0)-| (Names: '|':UIView:0x7fb07857fb70 )>",
"<NSLayoutConstraint:0x7fb0785bd5b0 UILabel:0x7fb0785150f0'info:'.top == UITableViewCellContentView:0x7fb078581400.topMargin>",
"<NSLayoutConstraint:0x7fb0785bd650 UITableViewCellContentView:0x7fb078581400.bottomMargin == UIView:0x7fb07857fb70.bottom + 1>",
"<NSLayoutConstraint:0x7fb0785bd6f0 V:[UILabel:0x7fb0785150f0'info:']-(8)-[UIView:0x7fb07857fb70]>",
"<NSLayoutConstraint:0x7fb078704f20 'UIView-Encapsulated-Layout-Height' V:[UITableViewCellContentView:0x7fb078581400(77)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x7fb07853ac20 V:[UIView:0x7fb0784dbb80(50)]>
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.
You programmaticlly change the height constraint to 50. It is unsatisfied with UIView-Encapsulated-Layout-Height constraint(77), which is set by iOS for UITableViewCellContentView.
Trying to create a view with a UITextField and UILabel beyond it.
What's wrong with the following code?
- (UIView *)tableHeaderView{
NSArray *constraints;
UIView *view = [[UIView alloc]initWithFrame:(CGRect){0,0,self.view.frame.size.width, 88}];
UITextField *tf = [[UITextField alloc]init];
tf.borderStyle = UITextBorderStyleRoundedRect;
tf.text = _filter.name;
[view addSubview:tf];
UILabel *titleLabel = [[UILabel alloc] init];
titleLabel.textAlignment = NSTextAlignmentCenter;
titleLabel.translatesAutoresizingMaskIntoConstraints = NO;
titleLabel.text = [NSString stringWithFormat:NSLocalizedString(#"Found results: %d", nil), _filter.resultsCount];
[view addSubview:titleLabel];
constraints = [NSLayoutConstraint constraintsWithVisualFormat:#"|-[titleLabel]-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(titleLabel)];
[view addConstraints:constraints];
constraints = [NSLayoutConstraint constraintsWithVisualFormat:#"|-[tf]-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(tf)];
[view addConstraints:constraints];
constraints = [NSLayoutConstraint constraintsWithVisualFormat:#"V:|[titleLabel]-8-[tf]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(titleLabel, tf)];
[view addConstraints:constraints];
}
Error message:
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:0x15dd2fc0 V:|-(0)-[UILabel:0x15dd1e10] (Names: '|':UIView:0x15dc4f90 )>",
"<NSLayoutConstraint:0x15dd3120 V:[UILabel:0x15dd1e10]-(8)-[UITextField:0x15dbe780]>",
"<NSAutoresizingMaskLayoutConstraint:0x15de2300 h=--& v=--& UITextField:0x15dbe780.midY ==>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x15dd3120 V:[UILabel:0x15dd1e10]-(8)-[UITextField:0x15dbe780]>
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.
2014-07-14 14:01:30.216 DossierPolice[4724:60b] 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:0x15dd2e20 H:[UITextField:0x15dbe780]-(NSSpace(20))-| (Names: '|':UIView:0x15dc4f90 )>",
"<NSAutoresizingMaskLayoutConstraint:0x15de1ee0 h=--& v=--& UITextField:0x15dbe780.midX ==>",
"<NSAutoresizingMaskLayoutConstraint:0x15de22d0 h=--& v=--& H:[UITextField:0x15dbe780(0)]>",
"<NSAutoresizingMaskLayoutConstraint:0x13a9eda0 h=--& v=--& H:[UIView:0x15dc4f90(320)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x15dd2e20 H:[UITextField:0x15dbe780]-(NSSpace(20))-| (Names: '|':UIView:0x15dc4f90 )>
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.
2014-07-14 14:01:30.217 DossierPolice[4724:60b] 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:0x15dd3160 V:[UITextField:0x15dbe780]-(0)-| (Names: '|':UIView:0x15dc4f90 )>",
"<NSAutoresizingMaskLayoutConstraint:0x15de2300 h=--& v=--& UITextField:0x15dbe780.midY ==>",
"<NSAutoresizingMaskLayoutConstraint:0x15de2330 h=--& v=--& V:[UITextField:0x15dbe780(0)]>",
"<NSAutoresizingMaskLayoutConstraint:0x13a9ee00 h=--& v=--& V:[UIView:0x15dc4f90(88)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x15dd3160 V:[UITextField:0x15dbe780]-(0)-| (Names: '|':UIView:0x15dc4f90 )>
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.
You forgot to set the translatesAutoresizingMaskIntoConstraints to NO on tf. This property prevents the layout engine to automatically transform the old style autoresizing masks into constraints, which is why the errors.
If you read error message cerfully you'll notice: (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
And later:
NSAutoresizingMaskLayoutConstraint:0x13a9eda0...
This means that you forgot to disable translates autoresizing mask.
Add tf.translatesAutoresizingMaskIntoConstraints = NO; to your code.
I have a complex set of labels and buttons. I set everything programmatically using mainly visual format language. The UILabels are created with the following method:
-(UILabel*)createLabelWithPlaceHolder:(NSString*)placeHolder{
UILabel *provisionalLabel=[[UILabel alloc] init];
provisionalLabel =[[UILabel alloc] init];
provisionalLabel.translatesAutoresizingMaskIntoConstraints=NO;
provisionalLabel.text=placeHolder;
provisionalLabel.font=[UIFont systemFontOfSize:12.0f];
provisionalLabel.backgroundColor=[UIColor greenColor];
provisionalLabel.textAlignment=NSTextAlignmentCenter;
[provisionalLabel setContentHuggingPriority:200 forAxis:UILayoutConstraintAxisHorizontal];
[provisionalLabel setContentCompressionResistancePriority:900 forAxis:UILayoutConstraintAxisHorizontal];
return provisionalLabel;
}
and the labels are displayed according to the following VLF code:
gap=(self.vistaGris.bounds.size.width*secondRowFactor)/7;
labelWidth=(self.vistaGris.bounds.size.width*(1-secondRowFactor))/6;
gapN=[NSNumber numberWithFloat:gap];
labelWidthN=[NSNumber numberWithFloat:labelWidth];
constraints = [NSLayoutConstraint
constraintsWithVisualFormat:#"H:|-gap-[solution4(width)]-gap-[solution5(width)]-gap-[solution6(width)]-gap-[solution7(width)]-gap-[solution8(width)]-gap-[solution9(width)]-gap-|"
options:NSLayoutFormatAlignAllBaseline
metrics:#{#"gap":gapN, #"width":labelWidthN}
views:viewsDictionary];
[self.vistaGris addConstraints:constraints];
Basically what it does is to display 6 labels on the bottom of the view. With equal spaces between them and same width. The device orientation is always landscape all the time.
The code does what I want it to do and everything is displayed OK. However I got a console warning telling me that the system cannot satisfy simultaneous constraints:
2014-04-19 09:59:48.749 Concentrations[431:60b] 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:0x8d6cd70 Linees:0x8c82d70.width == UIView:0x8c41c40.width>",
"<NSLayoutConstraint:0x8d84480 H:|-(6.85714)-[UILabel:0x8d65460] (Names: '|':Linees:0x8c82d70 )>",
"<NSLayoutConstraint:0x8d844d0 H:[UILabel:0x8d65460(72)]>",
"<NSLayoutConstraint:0x8d84500 H:[UILabel:0x8d65460]-(6.85714)-[UILabel:0x8d73890]>",
"<NSLayoutConstraint:0x8d84550 H:[UILabel:0x8d73890(72)]>",
"<NSLayoutConstraint:0x8d845b0 H:[UILabel:0x8d73890]-(6.85714)-[UILabel:0x8d731b0]>",
"<NSLayoutConstraint:0x8d845e0 H:[UILabel:0x8d731b0(72)]>",
"<NSLayoutConstraint:0x8d84640 H:[UILabel:0x8d731b0]-(6.85714)-[UILabel:0x8d734e0]>",
"<NSLayoutConstraint:0x8d84690 H:[UILabel:0x8d734e0(72)]>",
"<NSLayoutConstraint:0x8d84700 H:[UILabel:0x8d734e0]-(6.85714)-[UILabel:0x8d741b0]>",
"<NSLayoutConstraint:0x8d84730 H:[UILabel:0x8d741b0(72)]>",
"<NSLayoutConstraint:0x8d847d0 H:[UILabel:0x8d741b0]-(6.85714)-[UILabel:0x8d744d0]>",
"<NSLayoutConstraint:0x8d84800 H:[UILabel:0x8d744d0(72)]>",
"<NSLayoutConstraint:0x8d84860 H:[UILabel:0x8d744d0]-(6.85714)-| (Names: '|':Linees:0x8c82d70 )>",
"<NSAutoresizingMaskLayoutConstraint:0x8c8aef0 h=--& v=--& V:[UIView:0x8c41c40(480)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x8d847d0 H:[UILabel:0x8d741b0]-(6.85714)-[UILabel:0x8d744d0]>
The thing is that I don't set constraints for these labels anywhere else on my code and this debugger warning could not be less explanatory.
The warning says that you have an NSAutoresizingMaskLayoutConstraint (it derives from the autoresize automatically translated to constraints). Probably you want to set translatesAutoresizingMaskIntoConstraints=NO not only on the labels but on the vistaGris too.
I am programatically setting the following constraints on three views inside a UIView:
UIView *view1 = ((UIViewController *)[self.viewControllers objectAtIndex:0]).view;
UIView *view2 = ((UIViewController *)[self.viewControllers objectAtIndex:1]).view;
UIView *view3 = ((UIViewController *)[self.viewControllers objectAtIndex:2]).view;
NSDictionary *viewsDictionary = NSDictionaryOfVariableBindings(view1, view2, view3);
[self.contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"H:|-0-[view1(==320)]-0-[view2(==320)]-0-[view3(==320)]|" options:0 metrics:0 views:viewsDictionary]];
My intention is that each view is 320px wide, sitting flush against one-another with no gap, and view one up against the left edge of the containing UIView.
However, when compiled, the views are laid out on-top of one-another and I get the following in the console:
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:0x211811c0 H:|-(0)-[UIView:0xc683790] (Names: '|':UIView:0xc683320 )>",
"<NSAutoresizingMaskLayoutConstraint:0x21179820 h=-&- v=-&- UIView:0xc683790.midX == UIView:0xc683320.midX - 340>",
"<NSLayoutConstraint:0x211793d0 H:[UIView:0xc6a50c0]-(0)-| (Names: '|':UIView:0xc683320 )>",
"<NSLayoutConstraint:0x21179390 H:[UIView:0xc6a50c0(320)]>",
"<NSLayoutConstraint:0x21179350 H:[UIView:0xc6a05f0]-(0)-[UIView:0xc6a50c0]>",
"<NSLayoutConstraint:0x211563d0 H:[UIView:0xc6a05f0(320)]>",
"<NSLayoutConstraint:0x21156390 H:[UIView:0xc683790]-(0)-[UIView:0xc6a05f0]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x21179350 H:[UIView:0xc6a05f0]-(0)-[UIView:0xc6a50c0]>
Try setting
[view setTranslatesAutoresizingMaskIntoConstraints:NO];
for all of your views, it usually is enough to solve this kind of problem.