Array element cannot be bridged to Objective-C

Question

I have this code that creates a view and applies a gradient to it.

import UIKit
import QuartzCore


let rect : CGRect = CGRectMake(0,0,320,100)

var vista :          


        

Answer 1

This runtime error can also be triggered if it tries to bridge an array of type [MySwiftProtocol] over to Objective-C.

The solution is to mark your protocol with @objc:

@objc protocol MySwiftProtocol {
   // ...
}