UITextField text moving unexpectedly

问题

Below is a demonstration of how the text in my text field is moving when the text field is active. By applying a background to the field, i found that only the text moves, not the whole text field itself. This is not happening to the text field above as well, only the bottom one

回答1:

after search for this issue i recommend to change your font to another font. but there is some way to prevent this issue :

you can use this :

 - (void)textFieldDidEndEditing:(UITextField *)textField
{
 [textField layoutIfNeeded]; //Fixes iOS 9 text bounce glitch
  //...other stuff
}

please check this links :

Text in UITextField moves up after editing (center while editing)

UITextField text jumps iOS 9

回答2:

Try to change to font to Arial, helped me.

yourTextField.font = UIFont(name: "Arial", size: CGFloat(16))

来源：https://stackoverflow.com/questions/35680996/uitextfield-text-moving-unexpectedly