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Get the current first responder
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| // | |
| // UIResponder.swift | |
| // | |
| // Created by Groom on 23/03/2015. | |
| // Copyright (c) 2015 Stephen Groom. All rights reserved. | |
| // | |
| import UIKit | |
| extension UIResponder { | |
| //Class var not supported in 1.0 | |
| private struct CurrentFirstResponder { | |
| weak static var currentFirstResponder: UIResponder? | |
| } | |
| private class var currentFirstResponder: UIResponder? { | |
| get { return CurrentFirstResponder.currentFirstResponder } | |
| set(newValue) { CurrentFirstResponder.currentFirstResponder = newValue } | |
| } | |
| class func getCurrentFirstResponder() -> UIResponder? { | |
| currentFirstResponder = nil | |
| UIApplication.sharedApplication().sendAction("findFirstResponder", to: nil, from: nil, forEvent: nil) | |
| return currentFirstResponder | |
| } | |
| func findFirstResponder() { | |
| UIResponder.currentFirstResponder = self | |
| } | |
| } |
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Hi I'm new in Swift but I wish to understand how this work. Can you give me an advice what I have to read to understand this process?