我无法在Swift iOS中创建UIResponder nextResponder

Question

我有一个类ASTextField,它扩展到UITextField后我想定义textFieldResponder.

是否有任何解决方案写在Swift下面的行？

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

哪个是用Objective-C编写的？

-(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.
}

Answer 1

它会是这样的

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

希望能帮助到你!