Device, method, and graphical user interface for synchronizing two or more displays

A portable electronic device, comprising:

• a portable-device display;
• a communications interface for communicating with a plurality of vehicle displays in a vehicle, the plurality of vehicle displays including a first vehicle display and a second vehicle display, wherein the plurality of vehicle displays are configured to display vehicle native user interfaces generated by the vehicle and user interfaces generated by the portable electronic device;
• one or more processors;
• memory;
• and
• one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for:
• in accordance with a determination that the plurality of vehicle displays are displaying user interfaces generated by the portable electronic device:
• receiving first input information that is indicative of a first input detected by a first input source of a plurality of input sources, wherein the first input information includes:
• a first identifier for the first input source;
• and
• a first input description that describes the first input;
• using an input-source mapping that maps input sources to corresponding vehicle displays, selecting a first affected vehicle display from the plurality of vehicle displays based on the first identifier and the input-source mapping, wherein the input-source mapping maps the first input source and a second input source that is different from the first input source to different vehicle displays of the plurality of vehicle displays;
• and
• sending, to the first affected vehicle display, update information that enables the first affected vehicle display to be updated in accordance with the first input;
• wherein the portable electronic device uses the input source mapping and second input information indicative of a second input from the second input source that is different from the first input source to update a user interface on a second affected vehicle display of the plurality of vehicle displays, and the first affected vehicle display and the second affected vehicle display are separate display devices.

A non-transitory computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a portable electronic device that includes a portable-device display that is in communication with a plurality of vehicle displays in a vehicle, the plurality of vehicle displays including a first vehicle display and a second vehicle display, wherein the plurality of vehicle displays are configured to display vehicle native user interfaces generated by the vehicle and user interfaces generated by the portable electronic device, cause the portable electronic device to:

• in accordance with a determination that the plurality of vehicle displays are displaying user interfaces generated by the portable electronic device:
• receive first input information that is indicative of a first input detected by a first input source of a plurality of input sources, wherein the first input information includes:
• a first identifier for the first input source;
• and
• a first input description that describes the first input;
• using an input-source mapping that maps input sources to corresponding vehicle displays, select a first affected vehicle display from the plurality of vehicle displays based on the first identifier and the input-source mapping, wherein the input-source mapping maps the first input source and a second input source that is different from the first input source to different vehicle displays of the plurality of vehicle displays;
• and
• send, to the first affected vehicle display, update information that enables the first affected vehicle display to be updated in accordance with the first input;
• wherein the portable electronic device uses the input source mapping and second input information indicative of a second input from the second input source that is different from the first input source to update a user interface on a second affected vehicle display of the plurality of vehicle displays, and the first affected vehicle display and the second affected vehicle display are separate display devices.