Convert typedef to Swift

Question

How do I convert this code to Swift

 typedef  UIViewController<CalendarViewControllerNavigation> CalendarViewController;

tried to find solution everywhere but seems I can't find a reference to this.

You used the `typealias` tag for your question. So you seem to already know the answer. — rmaddy, Apr 03 '17 at 23:08
Swift doesn't currently support expressing the type of something that inherits from a class and conforms to a given protocol – but [it will in a future version of the language](https://github.com/apple/swift-evolution/blob/master/proposals/0156-subclass-existentials.md). — Hamish, Apr 03 '17 at 23:24
Do you any other way I can do that. Maybe create extension of UIViewController pressing protocol the typealias to that extension? — Thanh, Apr 04 '17 at 01:19

score 1 · Accepted Answer · answered Oct 16 '17 at 13:35

1

In Swift 4 you can use:

typealias CalendarViewController = UIViewController & CalendarViewControllerNavigation

Which uses the new protocol composition type. Also see SE-156.

answered Oct 16 '17 at 13:35

Sulthan

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score 0 · Answer 2 · answered Apr 04 '17 at 11:54

I was facing same issue to use calendar library from https://github.com/jumartin/Calendar.

I have solved this problem as below.

protocol CalendarViewControllerNavigation: NSObjectProtocol {
    func move(to date: Date, animated: Bool)
}

typealias CalendarTypeController = UIViewController

extension CalendarTypeController:CalendarViewControllerNavigation{
    internal func move(to date: Date, animated: Bool) {
    }
    internal func deviceIsRotated() {
    }
    internal func selectedEventForAddSession(event:EventDetail) {
    }
}


protocol CalenderViewControllerDelegate : NSObjectProtocol {
    func calendarViewController(_ controller:CalendarTypeController, showDate:NSDate)
}

Hope this code will help you!

Convert typedef to Swift

2 Answers2