IBOutletCollection set ordering in Interface Builder

Question

I am using IBOutletCollections to group several Instances of similar UI Elements. In particular I group a number of UIButtons (which are similar to buzzers in a quiz game) a

Answer 1

Here's an extension I created on Array to sort by tag, e.g., useful when working w/ IBOutletCollections.

extension Array where Element: UIView {

  /**
   Sorts an array of `UIView`s or subclasses by `tag`. For example, this is useful when working with `IBOutletCollection`s, whose order of elements can be changed when manipulating the view objects in Interface Builder. Just tag your views in Interface Builder and then call this method on your `IBOutletCollection`s in `viewDidLoad()`.
   - author: Scott Gardner
   - seealso:
   * [Source on GitHub](http://bit.ly/SortUIViewsInPlaceByTag)
   */
  mutating func sortUIViewsInPlaceByTag() {
    sortInPlace { (left: Element, right: Element) in
      left.tag < right.tag
    }
  }

}