Change default option of UIimagePickerController

Question

after taking a picture it is displying Retake,Preview and Use button.I need to change Use button as Save button.Is it possible?.

UIImagePickerController * imagePicker = [[UIImagePickerController alloc] init];
        imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
        imagePicker.delegate = self;
        [self presentModalViewController:imagePicker animated:YES];