If you develop a new active step subclass, consider contributing your code to the ResearchKit project so that it’s available for others to use in their studies.

In the ResearchKit framework, each step collects some information or data from the user. Typically, the task view controller instantiates the step view controller before presenting the …

ORKQuestionType An enumeration of values that identify the different types of questions that the ResearchKit framework supports.

Discussion When it’s about to present a step, the task view controller needs to look up a suitable default answer. The answer can be used to prepopulate a survey with the results obtained on …

ORKPSATPresentationMode Values that identify the presentation mode of paced serial addition tests that are auditory and/or visual (PSAT).

The ORKImageChoiceAnswerFormat class represents an answer format that lets participants choose one image from a fixed set of images in a single choice question.

ORKTappingButtonIdentifier Values that identify the button that was tapped in a tapping sample.

The graph chart view delegate protocol forwards pan gesture events occuring within the bounds of an ORKGraphChartView object.

The ORKDiscreteGraphChartView class presents data provided by an object conforming to the ORKValueRangeGraphChartViewDataSource protocol as a discrete graph of ranged ...

The ORKResultPredicate class provides convenience class methods to build predicates for most of the ORKQuestionResult subtypes.