Click button

def click_button(self, index_or_name):
        """ Click button """
        _platform_class_dict = {'ios': 'UIAButton',
                                'android': 'android.widget.Button'}
        if self._is_support_platform(_platform_class_dict):
            class_name = self._get_class(_platform_class_dict)
            self._click_element_by_class_name(class_name, index_or_name)