How to Remove Constraints Programmatically That Is Added from Storyboard

How to remove constraints programmatically that is added from storyboard?

As @Henit mentioned, you can set IBOutlet for constraints as well.

For example,

@property(weak, nonatomic) IBOutlet NSLayoutConstraint *viewHeight;

so now, you can remove this constraint like this:

[myView removeConstraint: viewHeight];

Or else if you want to remove all / multiple constraints related to your view then,

[myView removeConstraints: constraintsArrayHere]; // custom array of constraints references
[myView removeConstraints: [myView constraints]]; //all constraints

Then later you can add your new constraints in the same manner using addConstraint or addConstraints method.

For more details go through Apple Documentation here.

Hope this helps.

Removing constraints that were added programatically

You should assign your constraint to a property in your ViewController. And then set .isActive to false instead of true.

Your code should look like this:

let myConstraint = firstView.topAnchor.constraint(equalTo: secondView.bottomAnchor, constant: 15)

Now, to activate it:

myConstraint.isActive = true

And to disable it:

myConstraint.isActive = false

How to change constraints programmatically that is added from storyboard?

You need to create an IBOutlet of your constraint.

Then you set the constant value of your constraint in code:

labelWidthConstraint.constant = newValue

If you want it animated you can do something like this:

Swift

labelWidthConstraint.constant = newValue
UIView.animate(withDuration: 0.3, animations: { 
    self.view.layoutIfNeeded()
})

Objective-C

self.labelWidthConstraint.constant = newValue;
[UIView animateWithDuration:0.3 animations:^{        
    [self.view layoutIfNeeded];
}];

How to remove constraints on storyboard or menu

Single Constraint

To remove a single constraint just select it and hit delete.

All constraint for a selected view(s)

To remove constraints for a single view you select the view and hit the triangle button in the bottom right hand corner...

And hit "Clear Constraints" under the "Selected Views" part.

All constraints in a View Controller

To clear constraints for an entire View Controller do the same but hit "Clear Constraints" under the "All Views in ..." part.

All constraints in a storyboard

To clear all constraints in the Storyboard you'd be best to disable Auto Layout and then re-enable it for the Storyboard.

Remove all constraints affecting a UIView

The only solution I have found so far is to remove the view from its superview:

[view removeFromSuperview]

This looks like it removes all constraints affecting its layout and is ready to be added to a superview and have new constraints attached. However, it will incorrectly remove any subviews from the hierarchy as well, and get rid of [C7] incorrectly.

ios storyboard remove hidden constraints

There must be a menu on the left that displays all the constraints. If it's not there, there is a button on the bottom-left to show it:

Then you can just find the constraint and delete (backspace) it:

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