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.
Related
How is it possible to change AutoLayout Constraints during run time.
I need to change the coordinate of view during run time so i did following:
if ([OfferText length] != 0) {
cell.topContentView.translatesAutoresizingMaskIntoConstraints = YES;
CGRect newFrame = CGRectMake( 71, 4, [Util window_width]-71,50);
cell.topContentView.frame = newFrame;
}
While doing that I get following warning. Is it possible to change the auto layout constraints during run time.
(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:0x7fca729606a0 UIView:0x7fca7296c6e0.top == UITableViewCellContentView:0x7fca729712b0.topMargin + 2>",
"<NSAutoresizingMaskLayoutConstraint:0x7fca7286f620 h=--& v=--& UIView:0x7fca7296c6e0.midY == + 29>",
"<NSAutoresizingMaskLayoutConstraint:0x7fca7286f670 h=--& v=--& V:[UIView:0x7fca7296c6e0(50)]>",
"<NSAutoresizingMaskLayoutConstraint:0x7fca705c9770 h=--& v=--& 'UIView-Encapsulated-Layout-Top' V:|-(0)-[UITableViewCellContentView:0x7fca729712b0] (Names: '|':CollectionBrandCell:0x7fca72968820 )>"
)
I find my solution using following code:
in .h of tableviewcell In my case
#property (weak, nonatomic) IBOutlet NSLayoutConstraint *constraintsTopContentView;
and in .m
if ([OfferText length] != 0) {
cell.constraintsTopContentView.constant=-4;
}
If you are setting up constraints from Storyboard, then make the outlet's of the constraints that are required to change the view's co-ordinates.
For Example:
If you want to change the top space of some view XYZ, then please do the following:
Select that view's top constraint and make outlet in .h file. This will
look like this.
#property (strong, nonatomic) NSLayoutConstraint *XYZ'stopConstraint;
Now, change this constraints constant, when you required by the following
code.
self.XYZ'stopConstraints.constant = youValue;
Also, please remove this line from your code as it is not necessary as per my view.
cell.topContentView.translatesAutoresizingMaskIntoConstraints = YES;
Create outlets for constraints you want to change (similar to UI controls); then change constant property of them.
Your warning caused because you use cell.topContentView.translatesAutoresizingMaskIntoConstraints = YES;. This will creates some new constraints (NSAutoresizingMaskLayoutConstraint) and cause conflict with olds.
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
when I run my app on an iPhone I get the following errors. When I run it in the simulator I do not. If I take the -12-| away then the cell's height collapses to something like 30 pixels. And the UI breaks.
Can someone help me and tell me why?
Thanks
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:0x170285ff0 V:|-(12)-[UIImageView:0x1741ec200] (Names: '|':UITableViewCellContentView:0x17419c7d0 )>",
"<NSLayoutConstraint:0x170286040 V:[UIImageView:0x1741ec200(200)]>",
"<NSLayoutConstraint:0x170286090 V:[UIImageView:0x1741ec200]-(12)-| (Names: '|':UITableViewCellContentView:0x17419c7d0 )>",
"<NSLayoutConstraint:0x174881f40 'UIView-Encapsulated-Layout-Height' V:[UITableViewCellContentView:0x17419c7d0(224)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x170286090 V:[UIImageView:0x1741ec200]-(12)-| (Names: '|':UITableViewCellContentView:0x17419c7d0 )>
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.
Warning once only: Detected a case where constraints ambiguously suggest a height of zero for a tableview cell's content view. We're considering the collapse unintentional and using standard height instead.
Unable to simultaneously satisfy constraints.
In a custom UITableViewCell I defined the Layout Constraints as follows:
_imgView.translatesAutoresizingMaskIntoConstraints = NO;
[self.contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"H:|-15-[imageView]-15-|" options:0 metrics:nil views:#{ #"imageView": _imgView }]];
[self.contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"V:|-12-[imageView(200)]-12-|" options:0 metrics:metrics views:#{ #"imageView" : _imgView }]];
--- EDIT ---
In response to the contentView.bounds suggestion:
In my UITableViewController I implement the following:
_tableView.rowHeight = UITableViewAutomaticDimension;
_tableView.estimatedRowHeight = 30.0f;
So a zero height, should not be an issue.
The initial height of the cell is likely smaller than the vertical constraints. This creates an initial height conflict until the contentView's frame changes.
You can work around this issue using one of the following approaches:
Increase the cell's height in the storyboard to initially fit the content.
Change the bounds of the cell's contentView to a larger size:
self.contentView.bounds = CGRectMake(0, 0, 99999, 99999);
You'll find more details in the answers to this auto layout question.
Update:
The "Unable to simultaneously satisfy constraints" conflict is between the imageView constraints trying to set the cell's height to 225 points, and the fixed height trying to set the cell height to 224 points.
Your imageView vertical constraints use 224 (12 + 200 + 12) points. The tableView separator uses 1 point. So the cell height needs to be 225 points for all constraints to be met.
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 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)