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I have a container view in my viewController.swift file. Now i want to pass data between Container view class and viewController.swift class. All demos are available using delegate function. But i want to perform this using callbacks. How i can achieve this?

Manan Shah
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1 Answers1

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The following site is a great reference for closures; http://fuckingclosuresyntax.com/

In your UIView declare a property to hold your closure;

var callback: ((CustomData) -> Void)?

Again in your UIView when you want to pass some data through that callback you can use;

callback?(someData)

Finally in your UIViewController you set your UIView's callback;

view.callback = { (data) in
    // perform some operations
}
Daniel T-D
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  • you can replace `if..let` with `callback?(someData)` – Desdenova Dec 13 '18 at 11:49
  • Ah of course, I'd just quickly typed it up in Playground, I'll update my answer now. Thanks. – Daniel T-D Dec 13 '18 at 11:51
  • Yes, but i am talking about data from container view to viewcontroller. Container view is kind of UIViewController not UIVIew. – Manan Shah Dec 13 '18 at 11:55
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    The file type shouldn't make a difference? If you can get a reference to either, allowing you to set up a delegate then you can get a reference to either to set a closure. – Daniel T-D Dec 13 '18 at 12:00