uialertview 改变文字显示位置

- (void)willPresentAlertView:(UIAlertView *)alertView{

    UIView * view = [alertView.subviews objectAtIndex:2];

    if([view isKindOfClass:[UILabel class]]){

        UILabel* label = (UILabel*) view;

        CGRect frame = label.frame;

        frame.origin.x +=10;

        label.frame = frame;

        label.textAlignment = UITextAlignmentLeft;

    }

}