Allow to select starting index when displaying trip previews on CarPlay

Originator:eugene.andreiev
Number:rdar://42426674 Date Originated:July 20 2018
Status:Open Resolved:
Product:iOS + SDK: CarPlay Product Version:iOS 12 SDK Beta 4
Classification:Feature (New) Reproducible:Not Applicable
 
Area:
CarPlay

SDK Version: iOS 12 beta 4 SDK
Trip previews are always displayed from the first item - the API call is limited to 2 parameters: an array of trip previews and text configuration. It's leading to a bad UX from the user perspective when a user selects an item from the list and then see selected trip previews with functionality to switch between them.

The current UX Flow:
1) User opens a list of locations
2) User selects the 2d item from the list of 12 items
3) User sees the preview list of item with "*1* of 12" title of trip preview

The needed UX Flow (which actually works in Apple Maps):
1) User opens a list of locations
2) User selects the 2d item from the list of 12 items
3) User sees the preview list of item with "*2* of 12" title of trip preview

This could be done for example by extending -showTripPreviews- with -startingIndex parameter.

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