How do I stop UITextField Secure text showing characters

问题

I've enabled Secure text for my UITextField. At runtime when I type some text in I initially see the character before it turns to a bullet point. Is there a way to stop it showing the characters and having it as a bullet point as I type.

Is there something I need to add to

-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

Has anyone got an example?

回答1:

That is the default behaviour of the UITextField. So there's nothing much you can do about it. You can play with some kind of encryption on the coding side but on the view side, this behaviour will prevail.

回答2:

I dont know its good practice or not but following trick did it for me

-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    NSString *editedString = [textField.text stringByReplacingCharactersInRange:range withString:string];
    textField.text = editedString;
    return NO;
}

来源：https://stackoverflow.com/questions/24531274/how-do-i-stop-uitextfield-secure-text-showing-characters