iOS - changing constraint relation programmatically
given the following constraint in ios programmatically:
IBOutlet NSLayoutConstraint *myConstraint;
this constraint is linked in interfacebuilder to the following details:
How do I change the relation attribute programmatically. I tried to look up for a method called setRelation but I don't see it.
ios xcode interface-builder nslayoutconstraint
edited Dec 28 '18 at 7:34
Cœur
17.5k9103145
asked May 21 '15 at 18:25
j2emanuej2emanue
21.7k24139250
add a comment |
given the following constraint in ios programmatically:
IBOutlet NSLayoutConstraint *myConstraint;
this constraint is linked in interfacebuilder to the following details:
How do I change the relation attribute programmatically. I tried to look up for a method called setRelation but I don't see it.
ios xcode interface-builder nslayoutconstraint
edited Dec 28 '18 at 7:34
Cœur
17.5k9103145
asked May 21 '15 at 18:25
j2emanuej2emanue
21.7k24139250
1
What are you trying to do by changing the relation? There might be an easier way.
– chedabob
May 21 '15 at 18:35
add a comment |
given the following constraint in ios programmatically:
IBOutlet NSLayoutConstraint *myConstraint;
this constraint is linked in interfacebuilder to the following details:
How do I change the relation attribute programmatically. I tried to look up for a method called setRelation but I don't see it.
ios xcode interface-builder nslayoutconstraint
edited Dec 28 '18 at 7:34
Cœur
17.5k9103145
asked May 21 '15 at 18:25
j2emanuej2emanue
21.7k24139250
given the following constraint in ios programmatically:
IBOutlet NSLayoutConstraint *myConstraint;
this constraint is linked in interfacebuilder to the following details:
How do I change the relation attribute programmatically. I tried to look up for a method called setRelation but I don't see it.
ios xcode interface-builder nslayoutconstraint
ios xcode interface-builder nslayoutconstraint
edited Dec 28 '18 at 7:34
Cœur
17.5k9103145
asked May 21 '15 at 18:25
j2emanuej2emanue
21.7k24139250
edited Dec 28 '18 at 7:34
Cœur
17.5k9103145
asked May 21 '15 at 18:25
j2emanuej2emanue
21.7k24139250
edited Dec 28 '18 at 7:34
Cœur
17.5k9103145
edited Dec 28 '18 at 7:34
Cœur
17.5k9103145
edited Dec 28 '18 at 7:34
Cœur
17.5k9103145
17.5k9103145
asked May 21 '15 at 18:25
j2emanuej2emanue
21.7k24139250
asked May 21 '15 at 18:25
j2emanuej2emanue
21.7k24139250
asked May 21 '15 at 18:25
j2emanuej2emanue
21.7k24139250
21.7k24139250
1
What are you trying to do by changing the relation? There might be an easier way.
– chedabob
May 21 '15 at 18:35
add a comment |
1
What are you trying to do by changing the relation? There might be an easier way.
– chedabob
May 21 '15 at 18:35
1
1
What are you trying to do by changing the relation? There might be an easier way.
– chedabob
May 21 '15 at 18:35
What are you trying to do by changing the relation? There might be an easier way.
– chedabob
May 21 '15 at 18:35
add a comment |
2 Answers
2
active
oldest
votes
According to the documentation, relation is read-only.
What you will need to do, I suspect, is to set
self.myConstraint.active = NO;
Then make a new NSLayoutConstraint programmatically using:
+ constraintWithItem:attribute:relatedBy:toItem:attribute:multiplier:constant:
And in the process copying values you want to keep, and replacing the relation.
Then add it to the view hierarchy where appropriate.
answered May 21 '15 at 18:33
i_am_jorfi_am_jorf
44.6k11111205
add a comment |
You can do like that :
[self.view addConstraint:[NSLayoutConstraint
constraintWithItem:self.yellowView
attribute:NSLayoutAttributeWidth
relatedBy:NSLayoutRelationEqual
toItem:self.redView
attribute:NSLayoutAttributeWidth
multiplier:0.75
constant:0.0]];
answered Jul 18 '15 at 11:52
Erhan DemirciErhan Demirci
3,12332940
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
According to the documentation, relation is read-only.
What you will need to do, I suspect, is to set
self.myConstraint.active = NO;
Then make a new NSLayoutConstraint programmatically using:
+ constraintWithItem:attribute:relatedBy:toItem:attribute:multiplier:constant:
And in the process copying values you want to keep, and replacing the relation.
Then add it to the view hierarchy where appropriate.
answered May 21 '15 at 18:33
i_am_jorfi_am_jorf
44.6k11111205
add a comment |
According to the documentation, relation is read-only.
What you will need to do, I suspect, is to set
self.myConstraint.active = NO;
Then make a new NSLayoutConstraint programmatically using:
+ constraintWithItem:attribute:relatedBy:toItem:attribute:multiplier:constant:
And in the process copying values you want to keep, and replacing the relation.
Then add it to the view hierarchy where appropriate.
answered May 21 '15 at 18:33
i_am_jorfi_am_jorf
44.6k11111205
add a comment |
According to the documentation, relation is read-only.
What you will need to do, I suspect, is to set
self.myConstraint.active = NO;
Then make a new NSLayoutConstraint programmatically using:
+ constraintWithItem:attribute:relatedBy:toItem:attribute:multiplier:constant:
And in the process copying values you want to keep, and replacing the relation.
Then add it to the view hierarchy where appropriate.
answered May 21 '15 at 18:33
i_am_jorfi_am_jorf
44.6k11111205
According to the documentation, relation is read-only.
What you will need to do, I suspect, is to set
self.myConstraint.active = NO;
Then make a new NSLayoutConstraint programmatically using:
+ constraintWithItem:attribute:relatedBy:toItem:attribute:multiplier:constant:
And in the process copying values you want to keep, and replacing the relation.
Then add it to the view hierarchy where appropriate.
answered May 21 '15 at 18:33
i_am_jorfi_am_jorf
44.6k11111205
answered May 21 '15 at 18:33
i_am_jorfi_am_jorf
44.6k11111205
answered May 21 '15 at 18:33
i_am_jorfi_am_jorf
44.6k11111205
answered May 21 '15 at 18:33
i_am_jorfi_am_jorf
44.6k11111205
44.6k11111205
add a comment |
add a comment |
You can do like that :
[self.view addConstraint:[NSLayoutConstraint
constraintWithItem:self.yellowView
attribute:NSLayoutAttributeWidth
relatedBy:NSLayoutRelationEqual
toItem:self.redView
attribute:NSLayoutAttributeWidth
multiplier:0.75
constant:0.0]];
answered Jul 18 '15 at 11:52
Erhan DemirciErhan Demirci
3,12332940
add a comment |
You can do like that :
[self.view addConstraint:[NSLayoutConstraint
constraintWithItem:self.yellowView
attribute:NSLayoutAttributeWidth
relatedBy:NSLayoutRelationEqual
toItem:self.redView
attribute:NSLayoutAttributeWidth
multiplier:0.75
constant:0.0]];
answered Jul 18 '15 at 11:52
Erhan DemirciErhan Demirci
3,12332940
add a comment |
You can do like that :
[self.view addConstraint:[NSLayoutConstraint
constraintWithItem:self.yellowView
attribute:NSLayoutAttributeWidth
relatedBy:NSLayoutRelationEqual
toItem:self.redView
attribute:NSLayoutAttributeWidth
multiplier:0.75
constant:0.0]];
answered Jul 18 '15 at 11:52
Erhan DemirciErhan Demirci
3,12332940
You can do like that :
[self.view addConstraint:[NSLayoutConstraint
constraintWithItem:self.yellowView
attribute:NSLayoutAttributeWidth
relatedBy:NSLayoutRelationEqual
toItem:self.redView
attribute:NSLayoutAttributeWidth
multiplier:0.75
constant:0.0]];
answered Jul 18 '15 at 11:52
Erhan DemirciErhan Demirci
3,12332940
answered Jul 18 '15 at 11:52
Erhan DemirciErhan Demirci
3,12332940
answered Jul 18 '15 at 11:52
Erhan DemirciErhan Demirci
3,12332940
answered Jul 18 '15 at 11:52
Erhan DemirciErhan Demirci
3,12332940
3,12332940
add a comment |
add a comment |
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1
What are you trying to do by changing the relation? There might be an easier way.
– chedabob
May 21 '15 at 18:35