移至下一个响应者时键盘闪烁

Question

I implemented basic Next button on the Text Field using the following code:

func textFieldShouldReturn(textField: UITextField) -> Bool {
    let didResign = textField.resignFirstResponder()
    if(!didResign) {
        return false
    }

    let myView = getParentView(textField)
    dispatch_async(dispatch_get_main_queue(), { myView.nextField?.contentTextField.becomeFirstResponder() })

    return true
}

What annoys me is that before nextField becomes First Responder, the keyboard disappears for a brief moment which looks ugly.

The effect is not always visible, sometimes it looks like the keyboard stayed up, sometimes it blinks fast.

Is there a way to resign first responder but still keep the keyboard up? Move to next field whilst keeping the keyboard?

Answer 1

If you're working with UI, you should be on the main queue, so there's no need to dispatch_async to the main queue. Removing this code will make your code cleaner. The method you're implemented determines the behavior of the app when the return key is pressed. Resigning first responder dismisses the keyboard, so if this is not the effect you want, don't resign first responder.