当用户点击iPhone键盘上的发送按钮时，如何执行选择器？

Question

我有一个UITextView。当用户点击发送键时，我希望能够自动执行选择器。我怎样才能做到这一点？我知道UITextField有

- (BOOL)textFieldShouldReturn:(UITextField *)textField

Answer 1

试试这个：

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range 
 replacementText:(NSString *)text; {
  // Any new character added is passed in as the "text" parameter.
  if ([text isEqualToString:@"\n"]) {
    // If the Done button was pressed, resign the keyboard.
    [textView resignFirstResponder];
    // Return FALSE so that the final '\n' character doesn't get added.
    return NO;
  }
  // For any other character return TRUE so that the text gets added to the view.
  return YES;
}

希望有帮助！

Answer 2

你可以使用

[self performSelector:@selector(aMethod) withObject:nil afterDelay:0.1];

in

- (BOOL)textViewShouldEndEditing:(UITextView *)textView 
{
  return YES;
}

希望它可以帮助你..