Centering a view in its superview using Visual Format Language

Question

I just started learning AutoLayout for iOS and had a look at Visual Format Language.

It all works fine except for one thing: I just can\'t get a view to center withi

Answer 1

Absolutely possible was able to do it like this:

[NSLayoutConstraint constraintsWithVisualFormat:@"H:[view]-(<=1)-[subview]"
                                        options:NSLayoutFormatAlignAllCenterY
                                        metrics:nil
                                          views:NSDictionaryOfVariableBindings(view, subview)];

Learned this from here. Code above centers subview in view by Y obviously.

Swift3:

        NSLayoutConstraint.constraints(withVisualFormat: "H:[view]-(<=1)-[subview]",
                                       options: .alignAllCenterY,
                                                       metrics: nil,
                                                       views: ["view":self, "subview":_spinnerView])