iOS Get FirstResponder

gistfile1.txt

//////////////////////////////////////////////////
@implementation UIView (FirstResponder)
- (UIView *)findFirstResponder {
    if (self.isFirstResponder) {
        return self;
    }
    
    for (UIView *subView in self.subviews) {
        UIView *firstResponder = [subView findFirstResponder];
        if (firstResponder != nil) {
            return firstResponder;
        }
    }
    return nil;
}

@end

//////////////////////////////////////////////////
import UIKit

private weak var _currentFirstResonder: AnyObject?

extension UIResponder {
    
    static func findFirstResponder() -> AnyObject? {
        _currentFirstResonder = nil
        UIApplication.shared.sendAction(#selector(UIResponder._findFirstResponder(_:)), to: nil, from: nil, for: nil)
        return _currentFirstResonder
    }
    
    @objc private func _findFirstResponder(_ sender: AnyObject?) {
        _currentFirstResonder = self
    }
}

Should be _currentFirstResponder, not _currentFirstResonder