In UI testing one way of selecting element is by "Accessibility ID", e.g. in Appium:
Read a unique identifier for a UI element. For XCUITest it is the element's attribute. For Android it is the element's attribute.
In Titanium SDK "content description" for Android views composed from three other properties:
On iOS property "accessibilityIdentifier" is not used by Ti SDK.
I suggest to compose "accessibilityIdentifier" value on iOS same way it is done on Android for "content description".