ORKStroopStepViewController Class Reference

Inherits from ORKActiveStepViewController : ORKStepViewController : UIViewController
Declared in ORKStroopStepViewController.h
ORKStroopStepViewController.m

– initWithStep:

Returns a new step view controller for the specified step.

- (instancetype)initWithStep:(ORKStep *)step

Parameters

step

The step to be presented.

Return Value

A newly initialized step view controller.

Declared In

ORKStepViewController.h

– stepDidFinish

Tells the view controller that the active step has finished.

- (void)stepDidFinish

Discussion

This method is an override point for subclasses, called by the base class when the step has just finished.

The default implementation does nothing except in the case of steps that have countdown enabled. When countdown is enabled in a step, the view controller attempts to navigate automatically to the next step, if so configured.

Declared In

ORKActiveStepViewController.h

– result

The current state of the result. (read-only)

- (ORKStepResult *)result

Discussion

The task view controller uses this property to get the results for the step, and to collate them into the task result.

The current step result and any subsidiary results representing data collected so far are available in this property. You can detect significant changes to the result, such as when the user enters a new answer, using the stepViewControllerResultDidChange: delegate callback.

Subclasses must use this property to return the current results. Subclasses may call super to obtain a clean, empty result object appropriate for the step, to which they can attach appropriate child results.

The implementations of this method in the ResearchKit framework currently create a new result object on every call, so do not call this method unless it is actually necessary.

Declared In

ORKStepViewController.h

– start

Starts the active step.

- (void)start

Discussion

Call this method to start the timer on the active step, if there is one, and to start any data recording.

When you start the step, recorders are instantiated based on their configurations and then started. All timers should start, and the UI should show users that the step is in progress.

This method does nothing if the step has already started.

Subclasses should super when overriding this method.

Declared In

ORKActiveStepViewController.h