onWillFocus function Will emit the target route upon mounting and before each nav transition

static getCurrentPosition(geo_success, geo_error?, geo_options?) Invokes

iosannotations [{latitude: number, longitude: number, animateDrop: bool, draggable: bool, onDragStateChange: function

onMagicTap function When accessible is true, the system will invoke this function when the

visible bool

onDidFocus function Will be called with the new route of each scene after the transition is complete or

style View#style React style object.

iosdirectionalLockEnabled bool When true, the ScrollView will try to lock

static getPixelSizeForLayoutSize(layoutSize) Converts a layout size (dp)

margin number