我无法在Swift iOS中创建UIResponder nextResponder [英] I can't create UIResponder nextResponder in Swift iOS

问题描述

我有一个ASTextField类，它在UITextField之后扩展，我想定义textFieldResponder。

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

是否有任何解决方案在Swift中写入以下行？

Is any solution to write below line in Swift ??

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

这是用Objective-C编写的？

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.
}

推荐答案

这将是这样的

让nextResponder = textField.superview？.viewWithTag（nextTag）作为UIResponder！

希望它有所帮助！

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