How to create an IBInspectable of type enum

Question

enum is not an Interface Builder defined runtime attribute. The following does not show in Interface Builder's Attributes Inspector:

enum StatusShape:Int {     case Rectangle = 0     case Triangle = 1     case Circle = 2 } @IBInspectable var shape:StatusShape = .Rectangle 

From the documentation: You can attach the IBInspectable attribute to any property in a class declaration, class extension, or category for any type that’s supported by the Interface Builder defined runtime attributes: boolean, integer or floating point number, string, localized string, rectangle, point, size, color, range, and nil.

Q: How can I see an enum in Interface Builder's Attributes Inspector?

Answer 1

Swift 3

@IBInspectable var shape:StatusShape = .Rectangle merely creates a blank entry in Interface Builder:

Use an adapter, which will acts as a bridge between Swift and Interface Builder.
shapeAdapter is inspectable from IB:

   // IB: use the adapter    @IBInspectable var shapeAdapter:Int {         get {             return self.shape.rawValue         }         set( shapeIndex) {             self.shape = StatusShape(rawValue: shapeIndex) ?? .Rectangle         }     } 

Unlike the conditional compilation approach (using #if TARGET_INTERFACE_BUILDER), the type of the shape variable does not change with the target, potentially requiring further source code changes to cope with the shape:NSInteger vs. shape:StatusShape variations:

   // Programmatically: use the enum    var shape:StatusShape = .Rectangle 

Complete code

@IBDesignable class ViewController: UIViewController {      enum StatusShape:Int {         case Rectangle         case Triangle         case Circle     }      // Programmatically: use the enum     var shape:StatusShape = .Rectangle      // IB: use the adapter     @IBInspectable var shapeAdapter:Int {         get {             return self.shape.rawValue         }         set( shapeIndex) {             self.shape = StatusShape(rawValue: shapeIndex) ?? .Rectangle         }     } } 

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