I can't create UIResponder nextResponder in Swift iOS

问题

I have a class ASTextField which extends after UITextField and I want to define textFieldResponder.

Is any solution to write below line in Swift ??

UIResponder* nextResponder = [textField.superview viewWithTag:nextTag];

which has been written in Objective-C below?

-(BOOL)textFieldShouldReturn:(UITextField*)textField;
{
  NSInteger nextTag = textField.tag + 1;
  // Try to find next responder
  UIResponder* nextResponder = [textField.superview viewWithTag:nextTag];
  if (nextResponder) {
    // Found next responder, so set it.
    [nextResponder becomeFirstResponder];
  } else {
    // Not found, so remove keyboard.
    [textField resignFirstResponder];
  }
  return NO; // We do not want UITextField to insert line-breaks.
}

回答1:

it will be something like this

let nextResponder = textField.superview?.viewWithTag(nextTag) as UIResponder!

Hope it helps!

来源：https://stackoverflow.com/questions/26510110/i-cant-create-uiresponder-nextresponder-in-swift-ios