How to present keyboard inside popover?, ipad passcode lock style

问题

Is it posible to present a keyboard the way is shown when you set a passcode for your ipad?

回答1:

Unfortunately no, But what i did to replicate this was, built a bunch of buttons like a keyboard inside my passcode view using interface builder. Then linked each button to a command that would change the text field.

- (IBAction) button9_clicked:(id) sender{

    if ([self textField:theTextField shouldChangeCharactersInRange:range replacementString:@"9"]){
        self.theTextField.text=[self.theTextField.text stringByAppendingString:@"9"];
        range.location = self.theTextField.text.length;
    }
    else 
        range.location = self.theTextField.text.length;
}

来源：https://stackoverflow.com/questions/3636560/how-to-present-keyboard-inside-popover-ipad-passcode-lock-style