how to change textfield x and y location and when edit is begin it's go back to normal location

When i press button textfield frame location should changed [ex: (0,0) to (50,50)]. That code work's perfectly. But if i try to type in textfield it's go back to same frame location [0,0]

and this is my code

(IBAction)Buttonname:(id)sender
{
CGRect newframeTextfield = textfiledname.frame;
newframeTextfield.origin.y = 365;
textfiledname.frame = newframeTextfield;
}

And this is previous position

-(void)viewWillAppear:(BOOL)animated
{
    CGRect oldTextfieldframe = textfiledname.frame;
    oldTextfieldframe.origin.y = 333;
    oldTextfieldframe.origin.x = 50;
    textfiledname.frame = oldTextfieldframe;
}

and i am also using scrollview and automatic textfield move up when keyboard appear.

-(void)textFieldDidBeginEditing:(UITextField *)textField
{
        if (textField == textfiledname)
        {
            [Scrolview setContentOffset:CGPointMake(0, 210) animated:YES];
            Scrolview.contentSize = CGSizeMake(320, 900); // there is submit button in bottom so scroll up to submit when keyboard appear. Otherwise (320,568) using in other function
        }
}

and Advance Thanks... :)