messageKey and targetKey are both read from
Components.AddToHomeScreenGuide. They are separate because the instruction
is a sentence and the target is the bare control label — the same label the
mock screen paints, so the two can never name different controls.
One tap of the install flow.
Remarks
messageKeyandtargetKeyare both read fromComponents.AddToHomeScreenGuide. They are separate because the instruction is a sentence and the target is the bare control label — the same label the mock screen paints, so the two can never name different controls.