Right aligned UITextField spacebar does not advance cursor in iOS 7

It would be a bit of a hack, but if you really need that to look the iOS6 way, you can replace space with non-breaking space as it’s written. It’s treated differently. Example code could look like this:

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
    // only when adding on the end of textfield && it's a space
    if (range.location == textField.text.length && [string isEqualToString:@" "]) {
        // ignore replacement string and add your own
        textField.text = [textField.text stringByAppendingString:@"\u00a0"];
        return NO;
    }
    // for all other cases, proceed with replacement
    return YES;
}

In case it’s not clear, textField:shouldChangeCharactersInRange:replacementString: is a UITextFieldDelegate protocol method, so in your example, the above method would be in the viewcontroller designated by [textField setDelegate:self].

If you want your regular spaces back, you will obviously also need to remember to convert the text back by replacing occurrences of @"\u00a0" with @" " when getting the string out of the textfield.