iOS: Programmatically change height constraint of a UIView iOS: Programmatically change height constraint of a UIView ios ios

iOS: Programmatically change height constraint of a UIView


First add height constraint to your .h file:

//Add Outlet     IBOutlet NSLayoutConstraint *ViewHeightConstraint;

Next, add the below code to your .m file:

//Set Value From Here   ViewHeightConstraint.constant = 100;


You can connect that specific constraint to your code from the interface builder like

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And NSLayoutConstraint has a constant property to be set which is your constant pin value.

If you're adding your constraints programmatically, you can surely benefit from the identifier property in NSLayoutConstraint class. Set them and iterate over them to get that specific identifired constraint.

As the documentation says

extension NSLayoutConstraint {    /* For ease in debugging, name a constraint by setting its identifier, which will be printed in the constraint's description.     Identifiers starting with UI and NS are reserved by the system.     */    @availability(iOS, introduced=7.0)    var identifier: String?}


matomo