How to use the constraints created from iOS 9 in Objective C?

Question

How to use the constraints created from iOS 9 in Objective C? In Swift this shall be like this:

    button.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
    button.heightAnchor.constraint(equalToConstant: 100).isActive = true

Answer 1

Are you simply asking for an Objective-C translation of your Swift code?

[button.centerYAnchor constraintEqualToAnchor:view.centreYAnchor].active = YES;
[button.heightAnchor constraintEqualToConstant:100].active = YES;

The constraints behave and are used in exactly the same way, regardless of the language you use to create them.