how to access NSLayoutConstraint into tableviewcell with identifier to it?

Question

I am using autolayout into my project and there is one situation in which I stuck. I already done with it Custom XIB of TableviewCell but I want to do it with default prototype cell of Tableview. My design is like below

Now In my design I select constraint top to button and giving identifier like below

In Tableview Prototype cell, I cant give outlet of it. So how can i access that NSLayoutConstraint with identifier. I search through web but nothing found

Please help me.
Thank you

Answer 1

Hope this helps.

    NSArray *constraints = [myView constraints]; // Here myView is a reference to the required UI component 
    int count = [constraints count];
    int index = 0;
    BOOL found = NO;

    while (!found && index < count) {
        NSLayoutConstraint *constraint = constraints[index];
        if ( [constraint.identifier isEqualToString:@"topconstraint"] ) {
            //save the reference to constraint
            constraint.constant = yourValue;
            found = YES;
        }
        index++;
    }

Using Predicate also, one can filter out:

constraints.filter{ $0.identifier == "MyIdentifierText" }.first { }